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perf(transformer): introduce Stack #6093

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merged 1 commit into from
Sep 27, 2024

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@overlookmotel overlookmotel commented Sep 26, 2024

Stack is a stack structure, optimized for fast push/pop and reading/writing the last entry on the stack. The difference from NonEmptyStack is that it can be empty.

This has a different trade-off vs NonEmptyStack:

  • Stack::new does not allocate (NonEmptyStack does).
  • Stack::last and Stack::last_mut are fallible and contain a branch (those methods on NonEmptyStack are branchless and infallible).

Stack is only the better choice if:

  1. You want new() not to allocate. or
  2. Creating initial value for NonEmptyStack::new() is expensive.

Use Stack as one of the backing stores in SparseStack.

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@github-actions github-actions bot added the A-transformer Area - Transformer / Transpiler label Sep 26, 2024
@overlookmotel overlookmotel marked this pull request as ready for review September 26, 2024 23:31
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codspeed-hq bot commented Sep 26, 2024

CodSpeed Performance Report

Merging #6093 will not alter performance

Comparing 09-24-perf_transformer_introduce_stack_ (85aff19) with main (bd8f786)

Summary

✅ 29 untouched benchmarks

@overlookmotel overlookmotel force-pushed the 09-24-perf_transformer_introduce_nonemptystack_ branch from 38fd630 to 87032d2 Compare September 26, 2024 23:53
@overlookmotel overlookmotel force-pushed the 09-24-perf_transformer_introduce_stack_ branch from 30f3394 to c98b3bb Compare September 26, 2024 23:53
@Dunqing Dunqing added the 0-merge Merge with Graphite Merge Queue label Sep 27, 2024 — with Graphite App
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graphite-app bot commented Sep 27, 2024

Merge activity

`Stack` is a stack structure, optimized for fast push/pop and reading/writing the last entry on the stack. The difference from `NonEmptyStack` is that it can be empty.

This has a different trade-off vs `NonEmptyStack`:

* `Stack::new` does not allocate (`NonEmptyStack` does).
* `Stack::last` and `Stack::last_mut` are fallible and contain a branch (those methods on `NonEmptyStack` are branchless and infallible).

`Stack` is only the better choice if:
1. You want `new()` not to allocate. or
2. Creating initial value for `NonEmptyStack::new()` is expensive.

Use `Stack` as one of the backing stores in `SparseStack`.
@Dunqing Dunqing force-pushed the 09-24-perf_transformer_introduce_nonemptystack_ branch from 87032d2 to ad4ef31 Compare September 27, 2024 04:30
@Dunqing Dunqing force-pushed the 09-24-perf_transformer_introduce_stack_ branch from c98b3bb to 85aff19 Compare September 27, 2024 04:31
Base automatically changed from 09-24-perf_transformer_introduce_nonemptystack_ to main September 27, 2024 04:38
@graphite-app graphite-app bot merged commit 85aff19 into main Sep 27, 2024
27 checks passed
@graphite-app graphite-app bot deleted the 09-24-perf_transformer_introduce_stack_ branch September 27, 2024 04:42
Boshen added a commit that referenced this pull request Sep 27, 2024
## [0.30.2] - 2024-09-27

### Features

- 60c52ba ast: Allow passing span to `void_0` method (#6065) (Dunqing)
- cca433f codegen: Print `vite` / `webpack` special comments (#6021)
(Dunqing)
- 8d026e1 regular_expression: Implement `GetSpan` for RegExp AST nodes
(#6056) (camchenry)
- 7764793 regular_expression: Implement visitor pattern trait for regex
AST (#6055) (camchenry)
- f866781 semantic: Check for type annotations on left side of `for..in`
and `for..of` iterators (#6043) (DonIsaac)
- 8b2e9aa semantic: Check for JSDoc types in TS type annotations (#6042)
(DonIsaac)
- 28da771 transformer: Do not transform `**` with bigint literals
(#6023) (Boshen)

### Bug Fixes

- a88504c diagnostics: Check for terminal when displaying links (#6018)
(Boshen)
- 418ae25 isolated-declarations: Report uninferrable types in arrays
(#6084) (michaelm)
- e0a8959 minifier: Compute `void number` as `undefined` (#6028)
(Boshen)
- 0658576 paresr: Do not report missing initializer error in ambient
context (#6020) (Boshen)
- b1af73d semantic: Do not create a `global` symbol for `declare global
{}` (#6040) (DonIsaac)
- c8682e9 semantic,codegen,transformer: Handle definite `!` operator in
variable declarator (#6019) (Boshen)

### Performance

- 6b7d3ed isolated-declarations: Should clone transformed AST rather
than original AST (#6078) (Dunqing)
- 85aff19 transformer: Introduce `Stack` (#6093) (overlookmotel)
- ad4ef31 transformer: Introduce `NonEmptyStack` (#6092) (overlookmotel)

### Documentation

- 3099709 allocator: Document `oxc_allocator` crate (#6037) (DonIsaac)
- d60ceb4 oxc: Add README.md and crate-level docs (#6035) (DonIsaac)
- efabfc8 semantic: Improve doc comments on `Reference` methods (#6076)
(overlookmotel)

### Refactor

- 1fc80d1 ast: Move all ts ast related impl methods to `ast_impl`
(#6015) (Dunqing)
- fe696f0 codegen: Simplify printing annotation comments (#6027)
(Dunqing)
- e60ce50 transformer: Add `SparseStack::with_capacity` method (#6094)
(overlookmotel)
- 1399d2c transformer: Move `SparseStack` definition into folder (#6091)
(overlookmotel)
- 6bd29dd transformer: Add more debug assertions (#6090) (overlookmotel)
- c90b9bf transformer: Rename `SparseStack` methods (#6089)
(overlookmotel)
- 2b380c8 transformer: Remove unsued `self.ctx` (#6022) (Boshen)

### Testing

- 93575cd semantic: Add comprehensive regression test suite (#5976)
(DonIsaac)
- a4cec75 transformer: Enable tests (#6032) (overlookmotel)

---------

Co-authored-by: Boshen <1430279+Boshen@users.noreply.github.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
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