diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 345a05a..10d1dfb 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -57,11 +57,15 @@ jobs:
with:
version: '0.12.19'
enable-cache: true
+ - uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6
+ with:
+ node-version: '24.19.0'
- run: uv python install
- run: uv sync --locked --group browser-tests
- run: uv run --no-sync python -m playwright install --with-deps chromium
- run: uv run --no-sync python scripts/compiler_conformance.py --browser --report build/compiler-parity-report.json
- run: uv run --no-sync python scripts/compiler_browser_smoke.py --report build/compiler-browser-report.json
+ - run: uv run --no-sync python scripts/measure_compiler.py --browser --repeats 3 --output build/compiler-measurements
- uses: actions/upload-artifact@v5
if: always()
with:
@@ -69,4 +73,5 @@ jobs:
path: |
build/compiler-browser-report.json
build/compiler-parity-report.json
+ build/compiler-measurements/report.json
if-no-files-found: error
diff --git a/IMPLEMENTATION_PLAN.md b/IMPLEMENTATION_PLAN.md
index c0e5548..fcbd1ab 100644
--- a/IMPLEMENTATION_PLAN.md
+++ b/IMPLEMENTATION_PLAN.md
@@ -481,3 +481,11 @@ Shimify's exact MIT notice, including the runnable browser example. The versione
[compatibility matrix](docs/compiler-conformance.md) records the adopted scope
and remaining differences; full Python tracebacks and arbitrary dynamic Python
remain outside this compiler profile. No release was published.
+
+PERF-01 now provides [reproducible compiler measurements](docs/compiler-measurements.md):
+required helpers and full helpers for the same profile pass the shared reference
+corpus in Node/browser workers. Reports separate source, generated modules,
+helpers, maps, notices, metadata/harness and compressed payloads, with raw warm
+build, fresh/warm context startup and separate dedicated-worker V8 heap samples.
+These synchronous compiler fixtures do not include the browser-host/PWA shell;
+complete application and future interpreter measurements remain separate scopes.
diff --git a/docs/compiler-measurements.md b/docs/compiler-measurements.md
new file mode 100644
index 0000000..fe2bff6
--- /dev/null
+++ b/docs/compiler-measurements.md
@@ -0,0 +1,137 @@
+# Reproducing compiler measurements
+
+PERF-01 measures the existing helper selection in the development compiler. It
+compares required helpers with every helper available to the same language
+profile; it does not add an optimization or enable otherwise unsupported syntax.
+The complete positive compiler corpus must match CPython in both variants, in
+Node and in a real browser worker. Rejected/deferred features remain covered by
+the separate compiler conformance gate. Published 0.1.0 predates these APIs.
+
+```sh
+uv sync --locked --group browser-tests
+uv run --no-sync python -m playwright install chromium
+uv run --no-sync python scripts/measure_compiler.py --browser --repeats 5 \
+ --output build/compiler-measurements
+```
+
+Choose a new output directory. Omit --browser for the Node/reference and build/
+size gates. --channel chrome selects an installed Chrome and records its actual
+version. The reference and Node versions in CI are 3.14.7 and 24.19.0; the locked
+Playwright 1.64.0 installs its Chromium build. Hardware, OS caches, CPU frequency
+and background load are not controlled. Compare reports with matching recorded
+inputs and versions; the command accepts other development environments and
+reports them rather than silently treating them as identical.
+
+The output contains schema-1 compiler-footprint/1 report.json and twelve
+reproducible .tar.gz browser-fixture archives. Reports record the repository
+revision/modified state, actual installed compiler source hashes with canonical
+LF line endings, measurement/corpus hashes, Python/Node/browser/host versions,
+every output file/hash, raw build/startup/heap samples and reference outcomes.
+No host-specific absolute source paths are included. The initial observations
+were collected before their commit; the recorded script and compiler hashes
+identify the actual measurement inputs.
+
+## Payload accounting and behavior
+
+Three fixtures exercise numeric/Unicode values, the shared text-metrics callable,
+and its invalid-input error. Each has required/all-profile helpers and included/
+omitted maps. The application source and generated executable module statements
+are the same within a helper comparison. The baseline includes all synchronous
+helpers for a synchronous profile, or all non-browser helpers for an async corpus
+case. Injecting browser/async adapters into a synchronous application would change
+its requirements and is not a comparable baseline.
+
+The report separates original input source, generated executable modules,
+compatibility helpers, source maps, notices, compiler metadata and the small
+measurement HTML/worker harness. The physical buckets sum to complete payload
+bytes. Original source is a separate input metric; source maps can embed those
+same bytes. Interpreter assets are zero in this compiled profile. The browser-host
+SDK and pocket-python PWA shell are outside these synchronous fixtures and need
+separate complete-application measurements.
+
+Per-file gzip transfer bytes sum gzip level-9, mtime-zero streams for every file;
+HTTP headers, TLS framing and server content-encoding policy are excluded. This
+is a reproducible transfer estimate, not captured network traffic. A separate
+canonical USTAR archive uses sorted paths, fixed modes/ownership/timestamps and
+includes archive padding before gzip. Compressed archive bytes and independently
+compressed files answer different questions. Record the zlib version when
+comparing exact compressed bytes.
+
+The shared computation retains Shimify's exact MIT notice in every corresponding
+artifact. Other fixtures are original regression cases. Compiler provenance
+notices do not choose a license for the compiler itself. Only these approved
+fixtures are executed; the script is not a general application benchmark runner.
+
+## Timing and memory methods
+
+Build samples measure compilation and manifest generation in an already imported
+Python process after warming the compiler's Unicode repr table. They exclude
+Python startup, dependency installation and filesystem publication. The required
+and all-profile variants must emit identical bytes on every repeated build.
+
+Cold browser samples create a fresh storage/HTTP-cache context and a fresh module
+worker for each observation. The running browser process and OS caches are
+shared. Warm samples use one context, perform an explicit untimed warm-up, then
+create a new worker for each observation. HTTP cache is shared; V8 decides whether
+its code cache is reusable. Every served file is immutable during the run and
+uses max-age=3600. No service worker or server computation enters this measurement.
+
+The page timer starts before worker creation and ends after its result message.
+It includes worker bootstrap, application import, module initialization and one
+complete call; document navigation is outside that timer. Worker observations
+also separate dynamic import from initialization/call time. Every observed result
+and original error span must match CPython. Both helper modes additionally run
+all 24 positive corpus cases in Node and the browser (48 observations per target).
+These include precision/Unicode, side effects, imports, original errors and async
+cases; the measured synchronous fixtures do not imply broader browser-host support.
+
+Memory uses separate fresh-context workers, outside startup samples. The command
+selects the dedicated worker by URL and browser-context identity, forces a V8 GC,
+and reads CDP Runtime.getHeapUsage before importing the application and after
+retaining one module/result. It records used/total V8 heap, embedder heap and
+backing storage in bytes, plus the used-heap difference. These figures exclude
+process RSS, other processes and native/code allocations outside that API. A
+post-GC retained heap difference is not peak application memory or a hard memory
+limit. Memory samples must also produce the same reference outcome.
+
+The script refuses a measurement if helper variants disagree with the reference,
+any timed/memory call changes its result, browser scripts raise unhandled errors,
+or requests leave the local static GET fixture. Tests also deliberately corrupt
+an arithmetic helper to demonstrate that agreement between two wrong variants
+cannot satisfy the CPython gate. Neither smaller source nor a single run's timing
+establishes a general speed or memory improvement.
+
+## Recorded observations
+
+[The 2026-10-20 report](measurements/2026-10-20-compiler.json) records five samples
+per condition on one Darwin arm64 host, CPython 3.14.7, Node 24.19.0 and Chromium
+156.0.8078.4. The tables below describe that run only; raw samples and exact file
+identities remain in the report.
+
+| Fixture / variant | Input source B | Helper B | Complete payload B | Per-file gzip B |
+| --- | ---: | ---: | ---: | ---: |
+| numeric-and-unicode / required-maps | 138 | 9,796 | 17,855 | 6,522 |
+| numeric-and-unicode / all-profile-maps | 138 | 23,547 | 31,665 | 11,668 |
+| numeric-and-unicode / required-no-maps | 138 | 9,796 | 17,379 | 6,219 |
+| numeric-and-unicode / all-profile-no-maps | 138 | 23,547 | 31,189 | 11,367 |
+| text-metrics / required-maps | 702 | 10,357 | 25,152 | 8,947 |
+| text-metrics / all-profile-maps | 702 | 23,547 | 38,378 | 13,996 |
+| text-metrics / required-no-maps | 702 | 10,357 | 23,612 | 8,146 |
+| text-metrics / all-profile-no-maps | 702 | 23,547 | 36,838 | 13,194 |
+| text-metrics-error / required-maps | 651 | 10,357 | 24,614 | 8,815 |
+| text-metrics-error / all-profile-maps | 651 | 23,547 | 37,840 | 13,868 |
+| text-metrics-error / required-no-maps | 651 | 10,357 | 23,146 | 8,053 |
+| text-metrics-error / all-profile-no-maps | 651 | 23,547 | 36,372 | 13,103 |
+
+| Text-metrics variant | Warm build ms | Cold context ms | Warm context ms | Retained used-heap delta B |
+| --- | ---: | ---: | ---: | ---: |
+| required-maps | 1.290 | 10.400 | 4.200 | 67,152 |
+| all-profile-maps | 1.359 | 10.600 | 4.600 | 107,824 |
+| required-no-maps | 1.165 | 10.100 | 4.300 | 67,088 |
+| all-profile-no-maps | 1.256 | 10.100 | 4.500 | 107,760 |
+
+Helper selection reduces these fixture payloads relative to their full-profile
+baselines. The text-metrics required runtime is 10,357 bytes versus 23,547 bytes
+for all synchronous helpers. These observations do not compare full browser
+applications, MicroPython, Pyodide or the independent interpreter, and they do not
+establish a general startup or memory improvement.
diff --git a/docs/measurements/2026-10-20-compiler.json b/docs/measurements/2026-10-20-compiler.json
new file mode 100644
index 0000000..0758a01
--- /dev/null
+++ b/docs/measurements/2026-10-20-compiler.json
@@ -0,0 +1,5339 @@
+{
+ "applications": [
+ {
+ "browser": {
+ "cold_context_samples": [
+ {
+ "id": "fixture",
+ "initialize_and_run_ms": 0.5,
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+ "wall_ms": 11.599999904632568
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+ "median_cold_ms": 11.599999904632568,
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+ "memory_samples": [
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+ "embedderHeapUsedSize": 20984,
+ "totalSize": 786432,
+ "usedSize": 270732
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+ "totalSize": 786432,
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+ "build_ns": [
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+ "expected": {
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+ "stdout": "",
+ "value": {
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+ "value": "-3"
+ },
+ {
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+ },
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+ "binary",
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+ }
+ ],
+ "variant": "required-maps"
+ },
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+ ]
+ },
+ "build_ns": [
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+ "tuple",
+ "equal",
+ "compare",
+ "exception",
+ "index",
+ "input",
+ "iterate",
+ "javascript",
+ "len",
+ "repr",
+ "print",
+ "truth",
+ "types",
+ "unary"
+ ],
+ "id": "preconstructed-raise-all-profile",
+ "manifest_sha256": "6d192fa04cb141e59ed4ab8248f4c5e233ba604537c8930d2b52fff4f2de34c2"
+ },
+ {
+ "case": "output-before-error",
+ "helper_policy": "required",
+ "helpers": [
+ "error",
+ "numeric",
+ "str",
+ "binary",
+ "call",
+ "tuple",
+ "input",
+ "repr",
+ "print"
+ ],
+ "id": "output-before-error-required",
+ "manifest_sha256": "a31e7ccaea7c9d1d53a9eeef50cf4a52d910c6450eb31762b8d0e7a9296a7e7d"
+ },
+ {
+ "case": "output-before-error",
+ "helper_policy": "all-profile",
+ "helpers": [
+ "error",
+ "numeric",
+ "str",
+ "binary",
+ "binding",
+ "call",
+ "tuple",
+ "equal",
+ "compare",
+ "exception",
+ "index",
+ "input",
+ "iterate",
+ "javascript",
+ "len",
+ "repr",
+ "print",
+ "truth",
+ "types",
+ "unary"
+ ],
+ "id": "output-before-error-all-profile",
+ "manifest_sha256": "ef744930cd39dcf86cc2c78c43f92648ce30fd526bcb70b6b8043946e779cf43"
+ },
+ {
+ "case": "index-error",
+ "helper_policy": "required",
+ "helpers": [
+ "error",
+ "binding",
+ "call",
+ "numeric",
+ "str",
+ "tuple",
+ "index",
+ "input"
+ ],
+ "id": "index-error-required",
+ "manifest_sha256": "eb6cc0f6893bbc065affc8cccdba9c072f0c8533a1c93fd3e0ff3162295194a5"
+ },
+ {
+ "case": "index-error",
+ "helper_policy": "all-profile",
+ "helpers": [
+ "error",
+ "numeric",
+ "str",
+ "binary",
+ "binding",
+ "call",
+ "tuple",
+ "equal",
+ "compare",
+ "exception",
+ "index",
+ "input",
+ "iterate",
+ "javascript",
+ "len",
+ "repr",
+ "print",
+ "truth",
+ "types",
+ "unary"
+ ],
+ "id": "index-error-all-profile",
+ "manifest_sha256": "2f4eca1d61c6bb06d4498a7d74368fa7a99667365b50c92d4ba97cd9bc87e73c"
+ },
+ {
+ "case": "unbound-local",
+ "helper_policy": "required",
+ "helpers": [
+ "error",
+ "binding",
+ "call",
+ "str",
+ "tuple",
+ "input",
+ "truth"
+ ],
+ "id": "unbound-local-required",
+ "manifest_sha256": "bc7b38a18037ab95c3f6e045a904d1c29b6f4c89ba423fc3b9ab24cb2ce43e23"
+ },
+ {
+ "case": "unbound-local",
+ "helper_policy": "all-profile",
+ "helpers": [
+ "error",
+ "numeric",
+ "str",
+ "binary",
+ "binding",
+ "call",
+ "tuple",
+ "equal",
+ "compare",
+ "exception",
+ "index",
+ "input",
+ "iterate",
+ "javascript",
+ "len",
+ "repr",
+ "print",
+ "truth",
+ "types",
+ "unary"
+ ],
+ "id": "unbound-local-all-profile",
+ "manifest_sha256": "4b47ca28809730df794ef4c607e1c6451f7cf7fce077df6a0dc91dffc526e76c"
+ },
+ {
+ "case": "lazy-coroutine",
+ "helper_policy": "required",
+ "helpers": [
+ "error",
+ "call",
+ "javascript",
+ "async",
+ "str",
+ "tuple",
+ "input",
+ "async-expose",
+ "binding",
+ "numeric",
+ "equal",
+ "compare",
+ "repr",
+ "print"
+ ],
+ "id": "lazy-coroutine-required",
+ "manifest_sha256": "df2c091ef233c2d99dcf5a76223a089995a32cae5da118d7919dd0d7f49f7f8d"
+ },
+ {
+ "case": "lazy-coroutine",
+ "helper_policy": "all-profile",
+ "helpers": [
+ "error",
+ "call",
+ "javascript",
+ "async",
+ "str",
+ "tuple",
+ "input",
+ "async-expose",
+ "numeric",
+ "binary",
+ "binding",
+ "equal",
+ "compare",
+ "exception",
+ "index",
+ "iterate",
+ "len",
+ "repr",
+ "print",
+ "truth",
+ "types",
+ "unary"
+ ],
+ "id": "lazy-coroutine-all-profile",
+ "manifest_sha256": "e296deadc912d7b5ef1877a08787cb18aa8368afd7c64ae886b0c5010c795a0e"
+ },
+ {
+ "case": "promise-callback-once",
+ "helper_policy": "required",
+ "helpers": [
+ "error",
+ "call",
+ "javascript",
+ "async",
+ "str",
+ "tuple",
+ "input",
+ "async-expose",
+ "numeric",
+ "binary",
+ "binding",
+ "repr",
+ "print"
+ ],
+ "id": "promise-callback-once-required",
+ "manifest_sha256": "1124e367667277870a406cee777c380ad2e1974cec0e0aeda2a36dc80c2efd9d"
+ },
+ {
+ "case": "promise-callback-once",
+ "helper_policy": "all-profile",
+ "helpers": [
+ "error",
+ "call",
+ "javascript",
+ "async",
+ "str",
+ "tuple",
+ "input",
+ "async-expose",
+ "numeric",
+ "binary",
+ "binding",
+ "equal",
+ "compare",
+ "exception",
+ "index",
+ "iterate",
+ "len",
+ "repr",
+ "print",
+ "truth",
+ "types",
+ "unary"
+ ],
+ "id": "promise-callback-once-all-profile",
+ "manifest_sha256": "c494369931ca1da2069f5d01475cf4d3ef5b01ec7a5adbbc39c53e920f467623"
+ },
+ {
+ "case": "promise-rejection-value",
+ "helper_policy": "required",
+ "helpers": [
+ "error",
+ "call",
+ "javascript",
+ "async",
+ "str",
+ "tuple",
+ "input",
+ "async-expose",
+ "binding",
+ "exception"
+ ],
+ "id": "promise-rejection-value-required",
+ "manifest_sha256": "761fcc95e4b1cfc3c8a51679ec78b847a09c08d04f118fbb705aa28f68467afd"
+ },
+ {
+ "case": "promise-rejection-value",
+ "helper_policy": "all-profile",
+ "helpers": [
+ "error",
+ "call",
+ "javascript",
+ "async",
+ "str",
+ "tuple",
+ "input",
+ "async-expose",
+ "numeric",
+ "binary",
+ "binding",
+ "equal",
+ "compare",
+ "exception",
+ "index",
+ "iterate",
+ "len",
+ "repr",
+ "print",
+ "truth",
+ "types",
+ "unary"
+ ],
+ "id": "promise-rejection-value-all-profile",
+ "manifest_sha256": "60a42fa6f0ce48f6b4aba302db3f568aaa1f3ac47a89d5cd82782203a0edc482"
+ },
+ {
+ "case": "promise-callback-raise",
+ "helper_policy": "required",
+ "helpers": [
+ "error",
+ "call",
+ "javascript",
+ "async",
+ "str",
+ "tuple",
+ "input",
+ "async-expose",
+ "binding",
+ "exception",
+ "repr",
+ "print"
+ ],
+ "id": "promise-callback-raise-required",
+ "manifest_sha256": "daff8230b86b8dba72ddfae5331b5e6d30e9dfe216953a9d5ae23ddb6f26f4a1"
+ },
+ {
+ "case": "promise-callback-raise",
+ "helper_policy": "all-profile",
+ "helpers": [
+ "error",
+ "call",
+ "javascript",
+ "async",
+ "str",
+ "tuple",
+ "input",
+ "async-expose",
+ "numeric",
+ "binary",
+ "binding",
+ "equal",
+ "compare",
+ "exception",
+ "index",
+ "iterate",
+ "len",
+ "repr",
+ "print",
+ "truth",
+ "types",
+ "unary"
+ ],
+ "id": "promise-callback-raise-all-profile",
+ "manifest_sha256": "c70aec22836ae556acb93bd82faab1161b6a5c8550fdd1e04d61d7fb463c3e79"
+ },
+ {
+ "case": "async-original-failure",
+ "helper_policy": "required",
+ "helpers": [
+ "error",
+ "call",
+ "javascript",
+ "async",
+ "str",
+ "tuple",
+ "input",
+ "async-expose",
+ "numeric",
+ "binary",
+ "binding"
+ ],
+ "id": "async-original-failure-required",
+ "manifest_sha256": "ab38c1e2b78d68f729806b1505ccc70ce89d56d963fd34db14ca12014637afd7"
+ },
+ {
+ "case": "async-original-failure",
+ "helper_policy": "all-profile",
+ "helpers": [
+ "error",
+ "call",
+ "javascript",
+ "async",
+ "str",
+ "tuple",
+ "input",
+ "async-expose",
+ "numeric",
+ "binary",
+ "binding",
+ "equal",
+ "compare",
+ "exception",
+ "index",
+ "iterate",
+ "len",
+ "repr",
+ "print",
+ "truth",
+ "types",
+ "unary"
+ ],
+ "id": "async-original-failure-all-profile",
+ "manifest_sha256": "a15396374f9ef6f1c2de472692b80c13b29dbd57910efee07354f4f91b265d3c"
+ },
+ {
+ "case": "module-alias-and-initialization",
+ "helper_policy": "required",
+ "helpers": [
+ "error",
+ "binding",
+ "call",
+ "numeric",
+ "str",
+ "tuple",
+ "equal",
+ "compare",
+ "input",
+ "repr",
+ "print"
+ ],
+ "id": "module-alias-and-initialization-required",
+ "manifest_sha256": "578da11fba0660e5d5ec9c51d416bc889b9adb45484b518c25bf88817fefec74"
+ },
+ {
+ "case": "module-alias-and-initialization",
+ "helper_policy": "all-profile",
+ "helpers": [
+ "error",
+ "numeric",
+ "str",
+ "binary",
+ "binding",
+ "call",
+ "tuple",
+ "equal",
+ "compare",
+ "exception",
+ "index",
+ "input",
+ "iterate",
+ "javascript",
+ "len",
+ "repr",
+ "print",
+ "truth",
+ "types",
+ "unary"
+ ],
+ "id": "module-alias-and-initialization-all-profile",
+ "manifest_sha256": "a936f092ebad2090aceee20570073b9689e7db39f7fb9b22007ecb9cd4ffced6"
+ },
+ {
+ "case": "module-callback-origin",
+ "helper_policy": "required",
+ "helpers": [
+ "error",
+ "call",
+ "javascript",
+ "async",
+ "str",
+ "tuple",
+ "input",
+ "async-expose",
+ "binding",
+ "exception"
+ ],
+ "id": "module-callback-origin-required",
+ "manifest_sha256": "7d7fc3a290141e546d45a19600669f1cc6b7d5a31975ecb0febcd94879e776f9"
+ },
+ {
+ "case": "module-callback-origin",
+ "helper_policy": "all-profile",
+ "helpers": [
+ "error",
+ "call",
+ "javascript",
+ "async",
+ "str",
+ "tuple",
+ "input",
+ "async-expose",
+ "numeric",
+ "binary",
+ "binding",
+ "equal",
+ "compare",
+ "exception",
+ "index",
+ "iterate",
+ "len",
+ "repr",
+ "print",
+ "truth",
+ "types",
+ "unary"
+ ],
+ "id": "module-callback-origin-all-profile",
+ "manifest_sha256": "717afae5c91d269c5ae16d7be6f7c927a628dc1c9a8ba25659409e55b99c217d"
+ }
+ ]
+ },
+ "host": {
+ "logical_cpu_count": 10,
+ "machine": "arm64",
+ "processor": "arm",
+ "release": "27.0.0",
+ "system": "Darwin"
+ },
+ "kind": "python-javascript-compiler-measurements",
+ "measurement_scripts": {
+ "compiler_conformance.mjs": "db9214c6ce7e8c814fc81702417e1a765174826592381a5c764d01ca0921b184",
+ "compiler_conformance.py": "d03c5ea9846d4063b8da5a6d48bbb0a2ac43f4d7d818cfb32379499641ff71c9",
+ "measure_compiler.mjs": "d8fc75804b9834a0d0d4120d45875744c0046a07a0c273363af7c61f3842c509",
+ "measure_compiler.py": "f08c44e7f41a9cff032ad5c54bfa979df3653a012eb06b6e44ca4e386159d5e8"
+ },
+ "methods": {
+ "build": "Warm imported compiler and Unicode repr table; compilation and manifest generation only; excludes filesystem writes and Python startup.",
+ "cold": "Fresh browser context and worker per sample; browser process and OS caches remain warm/uncontrolled. Timer covers worker creation, imports, initialization, one call and result message; excludes document navigation.",
+ "memory": "Separate fresh-context worker samples. CDP HeapProfiler.collectGarbage then Runtime.getHeapUsage before import and after retaining one module/result. Used/total V8 heap, embedder heap and backing storage are bytes; excludes process RSS, other processes, and native/code allocations not exposed by this API.",
+ "scope": "Synchronous compiled-module browser fixtures, including measurement harness, maps/notices/manifest. Browser-host SDK and pocket PWA shell are measured separately. All-profile baseline includes every helper valid for the same profile; no new feature is enabled.",
+ "warm": "One context, explicit untimed warm-up, then a fresh worker for each observation. HTTP cache is shared; code-cache reuse is browser-controlled."
+ },
+ "node": "v24.19.0",
+ "python": "3.14.7",
+ "repository_revision": "35fbe6eb399f5d94e05e850eb36dbdf695e6d15a",
+ "samples_per_condition": 5,
+ "schema_version": 1,
+ "suite": "compiler-footprint/1",
+ "working_tree_modified": true
+}
diff --git a/pyproject.toml b/pyproject.toml
index 51333b9..99173ae 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,6 +43,9 @@ source-include = [
"scripts/compiler_browser_smoke.py",
"scripts/compiler_conformance.py",
"scripts/compiler_conformance.mjs",
+ "scripts/measure_compiler.py",
+ "scripts/measure_compiler.mjs",
+ "docs/measurements/*.json",
"examples/browser_text_metrics.py",
"CHANGELOG.md",
"RELEASING.md",
diff --git a/scripts/measure_compiler.mjs b/scripts/measure_compiler.mjs
new file mode 100644
index 0000000..286d6cb
--- /dev/null
+++ b/scripts/measure_compiler.mjs
@@ -0,0 +1,27 @@
+// Trusted measurement fixtures use the same tagged result shape in both targets.
+function typed(value) {
+ if (value === null) return {type:'none'};
+ if (typeof value === 'boolean') return {type:'bool',value};
+ if (typeof value === 'bigint') return {type:'int',value:String(value)};
+ if (value?.type === 'str') return {type:'str',codepoints:[...value.codepoints]};
+ if (value?.type === 'tuple') return {type:'tuple',items:value.items.map(typed)};
+ throw new TypeError('Unadopted measurement result');
+}
+
+export async function execute(url, exported = 'main') {
+ const before = performance.now();
+ const {createModule} = await import(url);
+ const imported = performance.now();
+ let stdout = '', value = null, app = null, error = null;
+ try {
+ app = createModule({write:text=>{stdout+=text;}});
+ if (exported) value = await app[exported]();
+ } catch (caught) {
+ const {filename,line,column} = caught.location || {};
+ error = {name:caught.name,message:caught.message,location:{filename,line,column}};
+ }
+ // Retain one module/result for the separate post-GC worker-heap observation.
+ globalThis.measurementRetained = {app,value,stdout};
+ return {result:{stdout,value:typed(value),error},
+ module_import_ms:imported-before,initialize_and_run_ms:performance.now()-imported};
+}
diff --git a/scripts/measure_compiler.py b/scripts/measure_compiler.py
new file mode 100644
index 0000000..fc84286
--- /dev/null
+++ b/scripts/measure_compiler.py
@@ -0,0 +1,391 @@
+"""Measure only the approved compiler corpus and shared computation fixtures."""
+
+import argparse
+from datetime import UTC, datetime
+from functools import partial
+import gzip
+import hashlib
+from http.server import SimpleHTTPRequestHandler, ThreadingHTTPServer
+from importlib.metadata import version
+import io
+import json
+import os
+from pathlib import Path
+import platform
+import statistics
+import subprocess
+import sys
+import tarfile
+import tempfile
+from threading import Thread
+import time
+from unittest.mock import patch
+from urllib.parse import urlsplit
+from urllib.request import url2pathname
+import zlib
+
+import JavaScript
+from JavaScript._compiler_runtime import HELPERS, helper_closure
+from JavaScript.emitter import OutputFile
+from JavaScript.modules import SourceModule, compile_modules
+
+import compiler_conformance as parity
+
+
+ROOT = Path(__file__).resolve().parents[1]
+VARIANTS = [('required-maps', False, True), ('all-profile-maps', True, True),
+ ('required-no-maps', False, False), ('all-profile-no-maps', True, False)]
+WORKER = '''import {execute} from './measure-runtime.mjs';
+self.onmessage=async({data})=>{
+ try{
+ const observations=[];
+ for(const entry of data.entries)observations.push({id:entry.id,...await execute(entry.url,entry.export)});
+ self.postMessage({id:data.id,observations});
+ }catch(error){self.postMessage({id:data.id,error:String(error.stack)});}
+};
+self.postMessage({id:0});
+'''
+PAGE = '''Compiler measurement
+
+'''
+
+
+def encoded(value):
+ return (json.dumps(value, sort_keys=True, indent=2, ensure_ascii=True) + '\n').encode()
+
+
+def compile_case(case, *, all_helpers=False, source_map=True):
+ modules = case.get('modules') or [{'name':'app', 'source':case['source']}]
+ sources = tuple(SourceModule.from_text(item['name'], item['source'], is_package=item.get('package', False)) for item in modules)
+ notices = (OutputFile('LICENSES/shimify.txt', parity.LICENSE.read_bytes(), 'notice'),) if case['id'].startswith('text-metrics') else ()
+ # Include every helper available to this language profile; async/browser
+ # helpers require different adapters and are not a valid synchronous baseline.
+ available = set(HELPERS) - {'browser'}
+ if not case.get('async'):
+ available -= {'async', 'async-expose'}
+ if all_helpers:
+ with patch('JavaScript.modules.helper_closure', return_value=helper_closure(available)):
+ return compile_modules(sources, entrypoint='app', source_map=source_map,
+ async_enabled=case.get('async', False), notices=notices)
+ return compile_modules(sources, entrypoint='app', source_map=source_map,
+ async_enabled=case.get('async', False), notices=notices)
+
+
+def files_for(artifact, *, harness=False):
+ files = {item.path:(item.data,item.role) for item in artifact.files}
+ files['COMPILED-MANIFEST.json'] = (artifact.manifest_bytes,'metadata')
+ if harness:
+ files.update({'index.html':(PAGE.encode(),'measurement-harness'),
+ 'measure-worker.mjs':(WORKER.encode(),'measurement-harness'),
+ 'measure-runtime.mjs':((ROOT/'scripts/measure_compiler.mjs').read_bytes(),'measurement-harness')})
+ return files
+
+
+def sizes(artifact, files):
+ buckets = {'executable-module':'generated_module_bytes', 'compatibility-helper':'helper_bytes',
+ 'source-map':'source_map_bytes', 'notice':'notice_bytes', 'metadata':'metadata_bytes',
+ 'measurement-harness':'measurement_harness_bytes'}
+ result = {name:0 for name in buckets.values()}
+ records, stream = [], io.BytesIO()
+ with tarfile.open(fileobj=stream, mode='w', format=tarfile.USTAR_FORMAT) as archive:
+ for path, (data,role) in sorted(files.items()):
+ result[buckets[role]] += len(data)
+ compressed = gzip.compress(data, compresslevel=9, mtime=0)
+ records.append({'path':path,'role':role,'size_bytes':len(data),
+ 'sha256':hashlib.sha256(data).hexdigest(),'gzip_bytes':len(compressed)})
+ member=tarfile.TarInfo(path)
+ member.size=len(data);member.mode=0o644;member.mtime=0
+ archive.addfile(member,io.BytesIO(data))
+ compressed = gzip.compress(stream.getvalue(), compresslevel=9, mtime=0)
+ result.update(input_source_bytes=sum(item['size'] for item in artifact.manifest['sources']),
+ interpreter_asset_bytes=0, complete_payload_bytes=sum(record['size_bytes'] for record in records),
+ gzip_file_transfer_bytes=sum(record['gzip_bytes'] for record in records),
+ canonical_tar_bytes=len(stream.getvalue()),gzip_tar_bytes=len(compressed),
+ gzip_tar_sha256=hashlib.sha256(compressed).hexdigest())
+ return result,records,compressed
+
+
+def write_files(root, files):
+ root.mkdir(parents=True)
+ for path,(data,_) in sorted(files.items()):
+ destination=root/path
+ destination.parent.mkdir(parents=True,exist_ok=True)
+ destination.write_bytes(data)
+
+
+def verify_results(entries, actual, expected):
+ if len(actual)!=len(entries) or {item['id'] for item in actual}!={item['id'] for item in entries}:
+ raise AssertionError('Missing or duplicate helper-conformance observations.')
+ for item in actual:
+ if item['result']!=expected[item['id']]:
+ raise AssertionError((item['id'],'CPython',expected[item['id']],'compiled',item['result']))
+
+
+def node_results(entries):
+ script="import{execute}from "+json.dumps((ROOT/'scripts/measure_compiler.mjs').as_uri())+";let input='';for await(const chunk of process.stdin)input+=chunk;const entries=JSON.parse(input),results=[];for(const entry of entries)results.push({id:entry.id,...await execute(entry.url,entry.export)});console.log(JSON.stringify(results));"
+ return json.loads(subprocess.check_output(['node','--input-type=module','--unhandled-rejections=strict','-e',script],
+ input=json.dumps(entries),text=True,encoding='utf-8',timeout=30))
+
+
+def prepare_conformance(root):
+ cases,_=parity.load_cases()
+ entries,expected,records=[],{},[]
+ for case in cases:
+ reference=parity.reference(case)
+ for all_helpers in [False,True]:
+ identity=case['id']+('-all-profile' if all_helpers else '-required')
+ artifact=compile_case(case,all_helpers=all_helpers)
+ directory=root/'conformance'/identity
+ write_files(directory,files_for(artifact))
+ entries.append({'id':identity,'url':(directory/'app.mjs').as_uri(),'export':case.get('export')})
+ expected[identity]=reference
+ records.append({'id':identity,'case':case['id'],'helper_policy':'all-profile' if all_helpers else 'required',
+ 'helpers':artifact.manifest['helpers'],'manifest_sha256':hashlib.sha256(artifact.manifest_bytes).hexdigest()})
+ verify_results(entries,node_results(entries),expected)
+ return entries,expected,records
+
+
+def fixtures():
+ cases,_=parity.load_cases()
+ computation=next(case['source'] for case in cases if case['id']=='text-metrics-single-module')
+ computation=computation[:computation.index('\nprint(metrics(')]
+ app='from text_metrics import metrics\ndef main():\n return metrics(""), metrics("A😀 é\\nline two"), metrics("a\\u00a0b")\n'
+ return [dict(next(case for case in cases if case['id']=='numeric-and-unicode'),id='numeric-and-unicode'),
+ {'id':'text-metrics','modules':[{'name':'app','source':app},{'name':'text_metrics','source':computation}],'export':'main'},
+ {'id':'text-metrics-error','modules':[{'name':'app','source':'from text_metrics import metrics\ndef main():\n return metrics(None)\n'},{'name':'text_metrics','source':computation}],'export':'main'}]
+
+
+def prepare_measurements(root, repeats):
+ rows=[]
+ for case in fixtures():
+ reference=parity.reference(case)
+ # Warm the compiler and Unicode repr table before collecting build samples.
+ for _,all_helpers,source_map in VARIANTS:
+ compile_case(case,all_helpers=all_helpers,source_map=source_map)
+ for variant,all_helpers,source_map in VARIANTS:
+ samples=[];artifact=None
+ for _ in range(repeats):
+ before=time.perf_counter_ns()
+ candidate=compile_case(case,all_helpers=all_helpers,source_map=source_map)
+ samples.append(time.perf_counter_ns()-before)
+ if artifact is not None and candidate!=artifact:
+ raise AssertionError('Compiler output changed between samples.')
+ artifact=candidate
+ files=files_for(artifact,harness=True)
+ directory=root/'applications'/case['id']/variant
+ write_files(directory,files)
+ counts,records,compressed=sizes(artifact,files)
+ available=set(HELPERS)-{'async','async-expose','browser'}
+ row={'fixture':case['id'],'variant':variant,'language_profile':artifact.manifest['language_profile'],
+ 'source_map':source_map,'helper_policy':'all-profile' if all_helpers else 'required',
+ 'helpers':artifact.manifest['helpers'],'omitted_profile_helpers':sorted(available-set(artifact.manifest['helpers'])),
+ 'sources':artifact.manifest['sources'],'manifest_sha256':hashlib.sha256(artifact.manifest_bytes).hexdigest(),
+ 'sizes':counts,'files':records,'build_ns':samples,'median_build_ns':statistics.median(samples),'expected':reference}
+ rows.append((row,directory,compressed))
+ entries=[{'id':row['fixture']+'/'+row['variant'],'url':(directory/'app.mjs').as_uri(),'export':'main'} for row,directory,_ in rows]
+ verify_results(entries,node_results(entries),{entry['id']:row['expected'] for entry,(row,_,_) in zip(entries,rows)})
+ return rows
+
+
+class Handler(SimpleHTTPRequestHandler):
+ def log_message(self,*args):
+ pass
+
+ def end_headers(self):
+ # Every served file is immutable for the duration of one measurement run.
+ self.send_header('Cache-Control','public, max-age=3600')
+ super().end_headers()
+
+
+class Server(ThreadingHTTPServer):
+ request_queue_size=128
+
+
+def worker_heap(browser,page):
+ """Read the actual dedicated worker's V8 heap, independently of timings."""
+ connection=browser.new_browser_cdp_session()
+ session=None
+ try:
+ page_connection=page.context.new_cdp_session(page)
+ try:
+ context_id=page_connection.send('Target.getTargetInfo')['targetInfo']['browserContextId']
+ finally:
+ page_connection.detach()
+ target=next(item for item in connection.send('Target.getTargets')['targetInfos']
+ if item['type']=='worker' and item['url']==page.workers[0].url
+ and item.get('browserContextId')==context_id)
+ session=connection.send('Target.attachToTarget',{'targetId':target['targetId'],'flatten':False})['sessionId']
+ responses={}
+ def receive(event):
+ message=json.loads(event['message'])
+ if event['sessionId']==session and 'id' in message:
+ responses[message['id']]=message
+ connection.on('Target.receivedMessageFromTarget',receive)
+ for identity,method in enumerate(['HeapProfiler.collectGarbage','Runtime.getHeapUsage'],1):
+ connection.send('Target.sendMessageToTarget',{'sessionId':session,'message':json.dumps({'id':identity,'method':method})})
+ deadline=time.monotonic()+10
+ while identity not in responses and time.monotonic()window.request(entries)',browser_entries)
+ verify_results(entries,actual,expected)
+ page.evaluate('window.closeWorker()')
+ for row,directory,_ in rows:
+ url=base+'/'+directory.relative_to(root).as_posix()+'/index.html'
+ cold=[];warm=[];memory=[]
+ for _ in range(repeats):
+ with monitored_context() as context:
+ page=context.new_page();page.set_default_timeout(30000);page.goto(url)
+ observation=page.evaluate('window.measureStartup()')
+ if observation.pop('result')!=row['expected']:
+ raise AssertionError('Cold browser computation differs from CPython.')
+ cold.append(observation)
+ with monitored_context() as context:
+ page=context.new_page();page.set_default_timeout(30000);page.goto(url)
+ first=page.evaluate('window.measureStartup()')
+ if first['result']!=row['expected']:
+ raise AssertionError('Warm-up computation differs from CPython.')
+ for _ in range(repeats):
+ observation=page.evaluate('window.measureStartup()')
+ if observation.pop('result')!=row['expected']:
+ raise AssertionError('Warm browser computation differs from CPython.')
+ warm.append(observation)
+ for _ in range(repeats):
+ with monitored_context() as context:
+ page=context.new_page();page.set_default_timeout(30000);page.goto(url)
+ page.evaluate('window.openWorker()')
+ before=worker_heap(browser,page)
+ observation=page.evaluate("window.request([{id:'fixture',url:new URL('./app.mjs',location.href).href,export:'main'}])")
+ if observation[0]['result']!=row['expected']:
+ raise AssertionError('Memory observation differs from CPython.')
+ after=worker_heap(browser,page)
+ memory.append({'baseline':before,'retained_module_and_result':after,
+ 'used_size_delta_bytes':after['usedSize']-before['usedSize']})
+ row['browser']={'cold_context_samples':cold,'warm_context_samples':warm,'memory_samples':memory,
+ 'median_cold_ms':statistics.median(item['wall_ms'] for item in cold),
+ 'median_warm_ms':statistics.median(item['wall_ms'] for item in warm)}
+ if errors:
+ raise AssertionError(('Unhandled browser errors',errors))
+ if not all(method=='GET' and url.startswith(base+'/') for method,url in requests):
+ raise AssertionError('Measurement fixtures made nonlocal/nonstatic requests.')
+ return {'version':browser.version,'channel':channel,'playwright_version':version('playwright'),
+ 'helper_conformance_cases':len(entries),'local_static_gets_only':True,
+ 'requested_paths':sorted({url.removeprefix(base) for _,url in requests})}
+ finally:
+ browser.close()
+ finally:
+ server.shutdown();server.server_close();thread.join(timeout=5)
+
+
+def measure(output,*,repeats=5,browser=False,channel=None):
+ if type(repeats) is not int or not 3<=repeats<=31:
+ raise ValueError('Use 3–31 samples per condition.')
+ output=Path(output).absolute()
+ if output.exists() or output.is_symlink():
+ raise ValueError('Choose a new measurement output directory.')
+ with tempfile.TemporaryDirectory() as temporary:
+ root=Path(temporary)
+ entries,expected,conformance=prepare_conformance(root)
+ rows=prepare_measurements(root,repeats)
+ browser_info=observe_browser(root,rows,entries,expected,channel=channel,repeats=repeats) if browser else None
+ revision=subprocess.check_output(['git','rev-parse','HEAD'],cwd=ROOT,text=True).strip()
+ modified=bool(subprocess.check_output(['git','status','--porcelain'],cwd=ROOT,text=True))
+ package_root=Path(JavaScript.__file__).parent
+ compiler_sources={path.relative_to(package_root).as_posix():hashlib.sha256(path.read_bytes().replace(b'\r\n',b'\n')).hexdigest()
+ for path in sorted(package_root.rglob('*')) if path.is_file() and path.suffix in {'.py','.mjs'}}
+ report={'kind':'python-javascript-compiler-measurements','schema_version':1,'suite':'compiler-footprint/1',
+ 'collected_at_utc':datetime.now(UTC).isoformat(),'repository_revision':revision,'working_tree_modified':modified,
+ 'compiler_version':version('Python-JavaScript'),'compiler_source_sha256':compiler_sources,
+ 'compiler_source_hash_policy':'Installed .py/.mjs files with canonical LF line endings',
+ 'python':platform.python_version(),
+ 'node':subprocess.check_output(['node','--version'],text=True).strip(),
+ 'host':{'system':platform.system(),'release':platform.release(),'machine':platform.machine(),'processor':platform.processor(),'logical_cpu_count':os.cpu_count()},
+ 'browser':browser_info,'samples_per_condition':repeats,
+ 'measurement_scripts':{name:hashlib.sha256((ROOT/'scripts'/name).read_bytes()).hexdigest() for name in ['measure_compiler.py','measure_compiler.mjs','compiler_conformance.py','compiler_conformance.mjs']},
+ 'corpus':{path.name:hashlib.sha256(path.read_bytes()).hexdigest() for path in [parity.FIXTURES/'compiler_contract.json',parity.FIXTURES/'compiler_parity.json',parity.LICENSE]},
+ 'compression':{'per_file':'gzip level 9, mtime 0; excludes HTTP headers','archive':'canonical USTAR then gzip level 9, mtime 0','zlib_version':zlib.ZLIB_RUNTIME_VERSION},
+ 'methods':{'build':'Warm imported compiler and Unicode repr table; compilation and manifest generation only; excludes filesystem writes and Python startup.',
+ 'cold':'Fresh browser context and worker per sample; browser process and OS caches remain warm/uncontrolled. Timer covers worker creation, imports, initialization, one call and result message; excludes document navigation.',
+ 'warm':'One context, explicit untimed warm-up, then a fresh worker for each observation. HTTP cache is shared; code-cache reuse is browser-controlled.',
+ 'memory':'Separate fresh-context worker samples. CDP HeapProfiler.collectGarbage then Runtime.getHeapUsage before import and after retaining one module/result. Used/total V8 heap, embedder heap and backing storage are bytes; excludes process RSS, other processes, and native/code allocations not exposed by this API.',
+ 'scope':'Synchronous compiled-module browser fixtures, including measurement harness, maps/notices/manifest. Browser-host SDK and pocket PWA shell are measured separately. All-profile baseline includes every helper valid for the same profile; no new feature is enabled.'},
+ 'helper_conformance':{'node':'pass','browser':'pass' if browser else 'not-run','observations':conformance},
+ 'applications':[row for row,_,_ in rows]}
+ output.mkdir(parents=True)
+ written=[]
+ try:
+ payloads={row['fixture']+'-'+row['variant']+'.tar.gz':compressed for row,_,compressed in rows}
+ payloads['report.json']=encoded(report)
+ for name,data in payloads.items():
+ path=output/name
+ with path.open('xb') as stream:
+ written.append(path)
+ stream.write(data)
+ except BaseException:
+ for path in reversed(written):path.unlink(missing_ok=True)
+ try:output.rmdir()
+ except OSError:pass
+ raise
+ return report
+
+
+def main():
+ parser=argparse.ArgumentParser(description=__doc__)
+ parser.add_argument('--output',type=Path,required=True)
+ parser.add_argument('--repeats',type=int,default=5)
+ parser.add_argument('--browser',action='store_true')
+ parser.add_argument('--channel')
+ args=parser.parse_args()
+ try:
+ report=measure(args.output,repeats=args.repeats,browser=args.browser,channel=args.channel)
+ except ValueError as error:
+ parser.error(str(error))
+ print(json.dumps({'report':str(args.output/'report.json'),'applications':len(report['applications']),
+ 'helper_conformance':len(report['helper_conformance']['observations']),
+ 'browser':None if report['browser'] is None else {key:report['browser'][key] for key in ['version','channel','playwright_version','helper_conformance_cases','local_static_gets_only']}}))
+
+
+if __name__=='__main__':
+ main()
diff --git a/tests/test_compiler_measurements.py b/tests/test_compiler_measurements.py
new file mode 100644
index 0000000..83950fa
--- /dev/null
+++ b/tests/test_compiler_measurements.py
@@ -0,0 +1,72 @@
+import gzip
+import hashlib
+import importlib.util
+import io
+from pathlib import Path
+import sys
+import tarfile
+import tempfile
+import unittest
+
+
+ROOT=Path(__file__).resolve().parents[1]
+sys.path.insert(0,str(ROOT/'scripts'))
+SPEC=importlib.util.spec_from_file_location('measure_compiler',ROOT/'scripts/measure_compiler.py')
+MEASURE=importlib.util.module_from_spec(SPEC)
+SPEC.loader.exec_module(MEASURE)
+
+
+class CompilerMeasurementTests(unittest.TestCase):
+ def test_required_and_full_profile_helpers_match_reference_and_detect_drift(self):
+ with tempfile.TemporaryDirectory() as temporary:
+ root=Path(temporary)
+ entries,expected,records=MEASURE.prepare_conformance(root)
+ cases,_=MEASURE.parity.load_cases()
+ self.assertEqual(len(records),2*len(cases))
+ self.assertEqual({record['helper_policy'] for record in records},{'required','all-profile'})
+ selected=next(entry for entry in entries if entry['id']=='numeric-and-unicode-all-profile')
+ runtime=root/'conformance'/selected['id']/'runtime.mjs'
+ source=runtime.read_text(encoding='utf-8')
+ changed=source.replace('return left + right;', 'return left - right;')
+ self.assertNotEqual(source,changed)
+ runtime.write_text(changed,encoding='utf-8')
+ with self.assertRaisesRegex(AssertionError,'CPython'):
+ MEASURE.verify_results([selected],MEASURE.node_results([selected]),expected)
+
+ def test_complete_payload_map_variants_and_compression_are_accounted(self):
+ with tempfile.TemporaryDirectory() as temporary:
+ rows=MEASURE.prepare_measurements(Path(temporary),3)
+ self.assertEqual(len(rows),12)
+ for row,directory,archive in rows:
+ with self.subTest(fixture=row['fixture'],variant=row['variant']):
+ counts=row['sizes']
+ buckets=['generated_module_bytes','helper_bytes','source_map_bytes','notice_bytes','metadata_bytes','measurement_harness_bytes']
+ self.assertEqual(sum(counts[name] for name in buckets),counts['complete_payload_bytes'])
+ self.assertEqual(sum(record['gzip_bytes'] for record in row['files']),counts['gzip_file_transfer_bytes'])
+ self.assertEqual(hashlib.sha256(archive).hexdigest(),counts['gzip_tar_sha256'])
+ self.assertEqual(len(gzip.decompress(archive)),counts['canonical_tar_bytes'])
+ self.assertEqual(row['source_map'],any(record['path'].endswith('.map') for record in row['files']))
+ self.assertEqual(counts['interpreter_asset_bytes'],0)
+ self.assertEqual(len(row['build_ns']),3)
+ with tarfile.open(fileobj=io.BytesIO(archive),mode='r:gz') as packed:
+ for record in row['files']:
+ data=packed.extractfile(record['path']).read()
+ self.assertEqual(data,(directory/record['path']).read_bytes())
+ self.assertEqual(hashlib.sha256(data).hexdigest(),record['sha256'])
+ if row['fixture'].startswith('text-metrics'):
+ self.assertEqual((directory/'LICENSES/shimify.txt').read_bytes(),MEASURE.parity.LICENSE.read_bytes())
+ if row['helper_policy']=='required':
+ self.assertTrue(row['omitted_profile_helpers'])
+ else:
+ self.assertEqual(row['omitted_profile_helpers'],[])
+
+ def test_sample_bounds_and_output_refusal_preserve_existing_files(self):
+ with tempfile.TemporaryDirectory() as temporary:
+ root=Path(temporary)
+ for repeats in [True,0,2,32]:
+ with self.subTest(repeats=repeats),self.assertRaises(ValueError):
+ MEASURE.measure(root/'new',repeats=repeats)
+ (root/'keep').write_bytes(b'keep')
+ with self.assertRaisesRegex(ValueError,'new measurement output'):
+ MEASURE.measure(root,repeats=3)
+ self.assertEqual((root/'keep').read_bytes(),b'keep')