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@hi-ogawa hi-ogawa commented Sep 21, 2024

Description

I think we should clear BenchmarkResult.samples by default on test runner side. I added benchmark.includeSamples option which allows returning samples, but it's disabled by default.

The fix is verified with this reproduction https://github.com/hi-ogawa/reproductions/tree/main/vitest-6539-bench-heap-oom

Plot of "used_heap_size"

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@hi-ogawa hi-ogawa changed the title fix(benchmark): deal with a huge BenchmarkResult.samples array fix(benchmark): clear BenchmarkResult.samples array to reduce memory usage Sep 21, 2024
@hi-ogawa hi-ogawa marked this pull request as ready for review September 21, 2024 06:04
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Would be great to add test case for this in https://github.com/vitest-tests/ and include it in Ecosystem CI. We already have some similar cases there. This one could be benchmark-large.

For example the coverage-large is there to verify that we don't run into similar OOM crash when coverage results of large project are collected. We used to store them in memory - #4603.

The reporters-large is there to verify that Vitest doesn't get completely stuck when there's a lot of reporting to do: #4710.

exclude: defaultExclude,
includeSource: [],
reporters: ['default'],
includeSamples: false,
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Is this not breaking change? Though benchmarking is experimental feature 🤔

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Right, this is a breaking change. We could start from default true, but I'm hoping that people haven't really needed to have raw samples. For example, since my last PR #5398. benchmark outputJson already omits raw samples.

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@sheremet-va have we previously introduced breaking changes for experimental features in minor releases, or also on patch releases?

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All the time

Co-authored-by: Ari Perkkiö <[email protected]>
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Would be great to add test case for this in https://github.com/vitest-tests/ and include it in Ecosystem CI. We already have some similar cases there. This one could be benchmark-large.

Sounds good! I'll prepare one.

exclude: defaultExclude,
includeSource: [],
reporters: ['default'],
includeSamples: false,
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Right, this is a breaking change. We could start from default true, but I'm hoping that people haven't really needed to have raw samples. For example, since my last PR #5398. benchmark outputJson already omits raw samples.

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vitest-ecosystem-ci bot commented Sep 23, 2024

📝 Ran ecosystem CI: Open

suite result
vitest-benchmark-large ✅ success

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Looks good to me! I've verified that the vitest-tests/benchmark-large crashes without this change.

@sheremet-va sheremet-va merged commit a6407af into vitest-dev:main Sep 25, 2024
14 of 16 checks passed
@hi-ogawa hi-ogawa deleted the fix-benchmark-clear-samples branch September 25, 2024 08:51
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When can we expect a new release? It'd be good to clarify the release cycle here in the docs.

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hi-ogawa commented Oct 2, 2024

@aleclarson I'm not sure if we'll have a stable release cycle (we'll discuss about it), but we just integrated pkg pr new, so you can grab one from main if you want to test it early https://github.com/vitest-dev/vitest/runs/30935774010

renovate bot added a commit to mmkal/eslint-plugin-mmkal that referenced this pull request Oct 2, 2024
##### [v2.1.2](https://github.com/vitest-dev/vitest/releases/tag/v2.1.2)

#####    🐞 Bug Fixes

-   Move `Vitest.setServer` to post `configureServer` hook to enable import analysis for workspace config loading  -  by [@hi-ogawa](https://github.com/hi-ogawa) in vitest-dev/vitest#6584 [<samp>(e7f35)</samp>](vitest-dev/vitest@e7f35214)
-   **benchmark**:
    -   Clear `BenchmarkResult.samples` array to reduce memory usage  -  by [@hi-ogawa](https://github.com/hi-ogawa) and [@AriPerkkio](https://github.com/AriPerkkio) in vitest-dev/vitest#6541 [<samp>(a6407)</samp>](vitest-dev/vitest@a6407afc)
-   **browser**:
    -   Fix dynamic import inside worker  -  by [@hi-ogawa](https://github.com/hi-ogawa) in vitest-dev/vitest#6569 [<samp>(ea2d4)</samp>](vitest-dev/vitest@ea2d429b)
    -   Fix browser mock factory event race condition  -  by [@hi-ogawa](https://github.com/hi-ogawa) in vitest-dev/vitest#6530 [<samp>(f131f)</samp>](vitest-dev/vitest@f131f93b)
    -   Serve ui assets as static  -  by [@hi-ogawa](https://github.com/hi-ogawa) in vitest-dev/vitest#6564 [<samp>(adcda)</samp>](vitest-dev/vitest@adcdaee8)
    -   Update solidjs testing library lib  -  by [@CamilleTeruel](https://github.com/CamilleTeruel) in vitest-dev/vitest#6548 [<samp>(91442)</samp>](vitest-dev/vitest@91442dfc)
    -   Use `data:` protocol on preview provider file upload  -  by [@userquin](https://github.com/userquin) in vitest-dev/vitest#6501 [<samp>(e9821)</samp>](vitest-dev/vitest@e9821f70)
    -   Fix base for client script  -  by [@hi-ogawa](https://github.com/hi-ogawa) in vitest-dev/vitest#6510 [<samp>(f9528)</samp>](vitest-dev/vitest@f952874e)
    -   Throw an error if "@vitest/browser/context" is imported outside of the browser mode  -  by [@sheremet-va](https://github.com/sheremet-va) in vitest-dev/vitest#6570 [<samp>(383f1)</samp>](vitest-dev/vitest@383f1791)
-   **coverage**:
    -   Remove empty coverage folder on test failure too  -  by [@AriPerkkio](https://github.com/AriPerkkio) in vitest-dev/vitest#6547 [<samp>(1371c)</samp>](vitest-dev/vitest@1371ca6a)
    -   Include `*.astro` by default  -  by [@AriPerkkio](https://github.com/AriPerkkio) in vitest-dev/vitest#6565 [<samp>(f8ff7)</samp>](vitest-dev/vitest@f8ff76a9)
    -   `cleanOnRerun: false` to invalidate previous results  -  by [@AriPerkkio](https://github.com/AriPerkkio) in vitest-dev/vitest#6592 [<samp>(88bde)</samp>](vitest-dev/vitest@88bde99c)
-   **expect**:
    -   Fix `toBeDefined` with `expect.poll`  -  by [@hi-ogawa](https://github.com/hi-ogawa) in vitest-dev/vitest#6562 [<samp>(f7da6)</samp>](vitest-dev/vitest@f7da6199)
-   **runner**:
    -   Mark tests as skipped when `beforeAll` failed  -  by [@hi-ogawa](https://github.com/hi-ogawa) in vitest-dev/vitest#6524 [<samp>(fb797)</samp>](vitest-dev/vitest@fb79792d)
    -   Support fixture parsing of lowered async syntax  -  by [@hi-ogawa](https://github.com/hi-ogawa) in vitest-dev/vitest#6531 [<samp>(b553c)</samp>](vitest-dev/vitest@b553c7d6)
    -   Fix fixture parsing of lowered async syntax for non arrow functions  -  by [@hi-ogawa](https://github.com/hi-ogawa) in vitest-dev/vitest#6575 [<samp>(3de00)</samp>](vitest-dev/vitest@3de00ab6)
    -   Guard test hook callback  -  by [@sheremet-va](https://github.com/sheremet-va) in vitest-dev/vitest#6604 [<samp>(14971)</samp>](vitest-dev/vitest@1497134e)
    -   Run `onTestFinished` and `onTestFailed` during `retry` and `repeats`  -  by [@hi-ogawa](https://github.com/hi-ogawa) in vitest-dev/vitest#6609 [<samp>(c5e29)</samp>](vitest-dev/vitest@c5e29098)
-   **ui**:
    -   List tests on ui when `--standalone`  -  by [@hi-ogawa](https://github.com/hi-ogawa) in vitest-dev/vitest#6577 [<samp>(d0bf8)</samp>](vitest-dev/vitest@d0bf89d3)
-   **vite-node**:
    -   Fix esm false-detection inside comment  -  by [@hi-ogawa](https://github.com/hi-ogawa) in vitest-dev/vitest#6506 [<samp>(91f85)</samp>](vitest-dev/vitest@91f85997)
-   **vitest**:
    -   Install dependencies with the same version when prompted  -  by [@sheremet-va](https://github.com/sheremet-va) in vitest-dev/vitest#6611 [<samp>(ed8b7)</samp>](vitest-dev/vitest@ed8b7c08)
    -   Make env.SSR consistent between different pools  -  by [@sheremet-va](https://github.com/sheremet-va) in vitest-dev/vitest#6616 [<samp>(8a8d3)</samp>](vitest-dev/vitest@8a8d3f03)
    -   Don't start a websocket server if api is disabled  -  by [@sheremet-va](https://github.com/sheremet-va) in vitest-dev/vitest#6617 [<samp>(82140)</samp>](vitest-dev/vitest@821400b8)
-   **workspace**:
    -   Fix glob pattern detection  -  by [@hi-ogawa](https://github.com/hi-ogawa) in vitest-dev/vitest#6502 [<samp>(7727c)</samp>](vitest-dev/vitest@7727ca87)
    -   Ignore DS_Store by default  -  by [@sheremet-va](https://github.com/sheremet-va) in vitest-dev/vitest#6571 [<samp>(d2a86)</samp>](vitest-dev/vitest@d2a86ff5)

#####     [View changes on GitHub](vitest-dev/vitest@v2.1.1...v2.1.2)
@renovate renovate bot mentioned this pull request Oct 3, 2024
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spamshaker pushed a commit to spamshaker/vitest that referenced this pull request Jun 30, 2025
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Vitest has too much memory usage in the face of a large number of benches

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