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Matteo Collina
29bd7402f8
A source without pull() has nothing observable left to do in its post-start step, since the started flag only gates calls into the pull algorithm. Set the flag right away instead of from a microtask, so a push-style ReadableStream allocates neither the closure nor the task and is not kept alive until the next microtask checkpoint. pipeTo and tee hold the only references to their reader and writer, so their [[closedPromise]] records are never observed as promises. Install the watchers as the records themselves, as pipeTo's ready hook already does, instead of materializing a promise plus reaction per side, and hand the erroring/release probes one shared pending promise. The tee's cancel promise is likewise materialized by the first branch cancel. Microtask ordering is unchanged: each hook enqueues its watcher at the position the promise reaction would have had. node benchmark/compare.js --runs 20 over benchmark/webstreams (46 rows, all others within the confidence interval): webstreams/creation.js kind='ReadableStream' *** +172.40% webstreams/creation.js kind='ReadableStream.tee' *** +20.47% webstreams/creation.js kind='ReadableStreamBYOBReader' *** +15.66% webstreams/creation.js kind='ReadableStreamDefaultReader' *** +14.53% webstreams/lifecycle.js kind='pipe-to' (40 runs) ** +10.98% Signed-off-by: Matteo Collina <hello@matteocollina.com> PR-URL: https://github.com/nodejs/node/pull/66424 Reviewed-By: Paolo Insogna <paolo@cowtech.it> Reviewed-By: Gürgün Dayıoğlu <hey@gurgun.day> Reviewed-By: James M Snell <jasnell@gmail.com>
Node.js Core Tests
This directory contains code and data used to test the Node.js implementation.
For a detailed guide on how to write tests in this directory, see the guide on writing tests.
On how to run tests in this directory, see the contributing guide.
For the tests to run on Windows, be sure to clone Node.js source code with the
autocrlf git config flag set to true.
Test Directories
| Directory | Runs on CI | Purpose |
|---|---|---|
abort |
Yes | Tests that use --abort-on-uncaught-exception and other cases where we want to avoid generating a core file. |
addons |
Yes | Tests for addon functionality along with some tests that require an addon. |
async-hooks |
Yes | Tests for async_hooks functionality. |
benchmark |
Yes | Test minimal functionality of benchmarks. |
cctest |
Yes | C++ tests that are run as part of the build process. |
code-cache |
No | Tests for a Node.js binary compiled with V8 code cache. |
common |
N/A | Common modules shared among many tests.1 |
doctool |
Yes | Tests for the documentation generator. |
es-module |
Yes | Test ESM module loading. |
fixtures |
N/A | Test fixtures used in various tests throughout the test suite. |
internet |
No | Tests that make real outbound network connections.2 |
js-native-api |
Yes | Tests for Node.js-agnostic Node-API functionality. |
known_issues |
Yes | Tests reproducing known issues within the system.3 |
message |
Yes | Tests for messages that are output for various conditions |
node-api |
Yes | Tests for Node.js-specific Node-API functionality. |
parallel |
Yes | Various tests that are able to be run in parallel. |
pseudo-tty |
Yes | Tests that require stdin/stdout/stderr to be a TTY. |
pummel |
No | Various tests for various modules / system functionality operating under load. |
sequential |
Yes | Various tests that must not run in parallel. |
testpy |
N/A | Test configuration utility used by various test suites. |
tick-processor |
No | Tests for the V8 tick processor integration.4 |
v8-updates |
No | Tests for V8 performance integration. |
-
Tests for networking related modules may also be present in other directories, but those tests do not make outbound connections. ↩︎
-
All tests inside of this directory are expected to fail. If a test doesn't fail on certain platforms, those should be skipped via
known_issues.status. ↩︎ -
The tests are for the logic in
lib/internal/main/prof_process.jsandlib/internal/v8_prof_polyfill.js. The tests confirm that the profile processor packages the correct set of scripts from V8 and introduces the correct platform specific logic. ↩︎