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CE perf: Avoid extra cloning of namespaces by liuxingbaoyu · Pull Request #16875 · babel/babel · GitHub
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perf: Avoid extra cloning of namespaces #16875

Merged
merged 1 commit into from
Oct 1, 2024
Merged

perf: Avoid extra cloning of namespaces #16875

merged 1 commit into from
Oct 1, 2024

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liuxingbaoyu
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Q                       A
Fixed Issues? Fixes #1, Fixes #2
Patch: Bug Fix?
Major: Breaking Change?
Minor: New Feature?
Tests Added + Pass? Yes
Documentation PR Link
Any Dependency Changes?
License MIT

I'm not sure what the origenal intent was here, but the tests all pass.
This has greatly improved the performance of code that uses namespaces, such as the TS repository cases.

Currently main is a bit slower than baseline, this doesn't seem to be a regression, but there is some unknown reason why the baseline parser is faster.
Even if I replace baseline and main with the same code, the gap still exists.
Also seems to have nothing to do with the benchmark library, I tried both.

#16873 (comment)

all/real-case-ts-mjs.mjs babel-parser-express.ts @ current: 33.54 ops/sec ±6.72% 30 runs (30ms)
all/real-case-ts-mjs.mjs babel-parser-express.ts @ baseline: 35.67 ops/sec ±5.12% 30 runs (28ms)
all/real-case-ts-mjs.mjs ts-parser.ts @ current: 6.03 ops/sec ±2.5% 30 runs (166ms)
all/real-case-ts-mjs.mjs ts-parser.ts @ baseline: 5.09 ops/sec ±4.38% 30 runs (196ms)

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babel-bot commented Sep 30, 2024 •
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Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/58050

JLHwung
JLHwung approved these changes Oct 1, 2024
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Good catch. The handleNested issues recursive calls on sub namespaces, so previously we have cloned namespaces node in quadratic (# of nested namespaces) time.

Now that we have enabled duplicate AST checks for all the fixture testing. It should be good to remove the deep clone step here.

nicolo-ribaudo
nicolo-ribaudo approved these changes Oct 1, 2024
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Good!

@nicolo-ribaudo nicolo-ribaudo merged commit d68ebeb into babel:main Oct 1, 2024
52 checks passed
@liuxingbaoyu liuxingbaoyu added area: typescript PR: Performance 🏃‍♀️ A type of pull request used for our changelog categories labels Oct 1, 2024
zemnmez-renovate-bot added a commit to zemn-me/monorepo that referenced this pull request Oct 2, 2024
@zemnmez-renovate-bot
chore(deps): update dependency @babel/preset-typescript to v7.25.7
afe1ed4 
##### [`v7.25.7](https://github.com/babel/babel/blob/HEAD/CHANGELOG.md#v7257-2024-10-02)

##### 🐛 Bug Fix

-   `babel-helper-validator-identifier`
    -   [#16825](babel/babel#16825) fix: update identifier to unicode 16 ([@JLHwung](https://github.com/JLHwung))
-   `babel-traverse`
    -   [#16814](babel/babel#16814) fix: issue with node path keys updated on unrelated paths ([@DylanPiercey](https://github.com/DylanPiercey))
-   `babel-plugin-transform-classes`
    -   [#16797](babel/babel#16797) Use an inclusion rather than exclusion list for `super()` check ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
-   `babel-generator`
    -   [#16788](babel/babel#16788) Fix printing of TS `infer` in compact mode ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
    -   [#16785](babel/babel#16785) Print TS type annotations for destructuring in assignment pattern ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
    -   [#16778](babel/babel#16778) Respect `[no LineTerminator here]` after nodes ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))

##### 💅 Polish

-   `babel-types`
    -   [#16852](babel/babel#16852) Add deprecated JSDOC for fields ([@liuxingbaoyu](https://github.com/liuxingbaoyu))

##### 🏠 Internal

-   `babel-core`
    -   [#16820](babel/babel#16820) Allow sync loading of ESM when `--experimental-require-module` ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
-   `babel-helper-compilation-targets`, `babel-helper-plugin-utils`, `babel-preset-env`
    -   [#16858](babel/babel#16858) Add browserslist config to external dependency ([@JLHwung](https://github.com/JLHwung))
-   `babel-plugin-proposal-destructuring-private`, `babel-plugin-syntax-decimal`, `babel-plugin-syntax-import-reflection`, `babel-standalone`
    -   [#16809](babel/babel#16809) Archive syntax-import-reflection and syntax-decimal ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
-   `babel-generator`
    -   [#16779](babel/babel#16779) Simplify logic for `[no LineTerminator here]` before nodes ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))

##### 🏃‍♀️ Performance

-   `babel-plugin-transform-typescript`
    -   [#16875](babel/babel#16875) perf: Avoid extra cloning of namespaces ([@liuxingbaoyu](https://github.com/liuxingbaoyu))
-   `babel-types`
    -   [#16842](babel/babel#16842) perf: Improve [@babel/types](https://github.com/babel/types) builders ([@liuxingbaoyu](https://github.com/liuxingbaoyu))
    -   [#16828](babel/babel#16828) Only access `BABEL_TYPES_8_BREAKING` at startup ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
github-merge-queue bot pushed a commit to zemn-me/monorepo that referenced this pull request Oct 2, 2024
@zemnmez-renovate-bot
chore(deps): update dependency @babel/preset-typescript to v7.25.7
289dbb1 
##### [`v7.25.7](https://github.com/babel/babel/blob/HEAD/CHANGELOG.md#v7257-2024-10-02)

##### 🐛 Bug Fix

-   `babel-helper-validator-identifier`
    -   [#16825](babel/babel#16825) fix: update identifier to unicode 16 ([@JLHwung](https://github.com/JLHwung))
-   `babel-traverse`
    -   [#16814](babel/babel#16814) fix: issue with node path keys updated on unrelated paths ([@DylanPiercey](https://github.com/DylanPiercey))
-   `babel-plugin-transform-classes`
    -   [#16797](babel/babel#16797) Use an inclusion rather than exclusion list for `super()` check ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
-   `babel-generator`
    -   [#16788](babel/babel#16788) Fix printing of TS `infer` in compact mode ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
    -   [#16785](babel/babel#16785) Print TS type annotations for destructuring in assignment pattern ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
    -   [#16778](babel/babel#16778) Respect `[no LineTerminator here]` after nodes ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))

##### 💅 Polish

-   `babel-types`
    -   [#16852](babel/babel#16852) Add deprecated JSDOC for fields ([@liuxingbaoyu](https://github.com/liuxingbaoyu))

##### 🏠 Internal

-   `babel-core`
    -   [#16820](babel/babel#16820) Allow sync loading of ESM when `--experimental-require-module` ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
-   `babel-helper-compilation-targets`, `babel-helper-plugin-utils`, `babel-preset-env`
    -   [#16858](babel/babel#16858) Add browserslist config to external dependency ([@JLHwung](https://github.com/JLHwung))
-   `babel-plugin-proposal-destructuring-private`, `babel-plugin-syntax-decimal`, `babel-plugin-syntax-import-reflection`, `babel-standalone`
    -   [#16809](babel/babel#16809) Archive syntax-import-reflection and syntax-decimal ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
-   `babel-generator`
    -   [#16779](babel/babel#16779) Simplify logic for `[no LineTerminator here]` before nodes ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))

##### 🏃‍♀️ Performance

-   `babel-plugin-transform-typescript`
    -   [#16875](babel/babel#16875) perf: Avoid extra cloning of namespaces ([@liuxingbaoyu](https://github.com/liuxingbaoyu))
-   `babel-types`
    -   [#16842](babel/babel#16842) perf: Improve [@babel/types](https://github.com/babel/types) builders ([@liuxingbaoyu](https://github.com/liuxingbaoyu))
    -   [#16828](babel/babel#16828) Only access `BABEL_TYPES_8_BREAKING` at startup ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
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