kdy1/port-nullish - Branch - swc-project/swc

feat(es/transformer): Merge `nullish_coalescing`

#11365Merged

Comparing

kdy1/port-nullish

(

15f0d91

) with

main

(

57a8731

)

+5%

Improvements: 1

Untouched: 137

Ignored: 1

Benchmarks

Improved

es2020_nullish_coalescing

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

+5%

312.2 µs297.8 µs

Passed

es/preset-env/usage/property

crates/swc_ecma_preset_env/benches/polyfills.rs::benches::bench_cases

+2%

109 µs107.1 µs

es/preset-env/usage/builtin_type

crates/swc_ecma_preset_env/benches/polyfills.rs::benches::bench_cases

+1%

235.2 µs233.5 µs

parse_and_babelify_jquery

crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases

99 ms98.6 ms

es2022_class_properties

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

385.7 µs384.1 µs

es/minifier/libs/victory

crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs

853.3 ms850 ms

es2020_optional_chaining

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

338.1 µs336.9 µs

es/lints/libs/three

crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs

50.5 ms50.3 ms

es/minifier/libs/terser

crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs

350.6 ms349.4 ms

es2015_block_scoping

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

457.4 µs456 µs

es/minifier/libs/d3

crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs

394.4 ms393.3 ms

es2015_classes

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

391.3 µs390.2 µs

parse_and_babelify_backbone

crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases

15.4 ms15.3 ms

es/parser/colors

crates/swc_ecma_parser/benches/parser.rs::benches::bench_files

80.2 µs80 µs

babelify-only

crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases

2.1 ms2.1 ms

html/document_fragment/visitor/compare/clone

crates/swc_html_parser/benches/compare.rs::benches::bench_cases

1 ms1 ms

es2015_duplicate_keys

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

280.4 µs279.9 µs

es/minifier/libs/three

crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs

645.5 ms644.4 ms

es2015_parameters

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

333.4 µs332.9 µs

es2015_destructuring

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

347.5 µs347.1 µs

stackoverflow

crates/swc_html_minifier/benches/full.rs::files_document_fragment::bench_files_document_fragment::html/minify/document_fragment

37 ms37 ms

es/minifier/libs/lodash

crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs

113.9 ms113.8 ms

github

crates/swc_html_minifier/benches/full.rs::files_document_fragment::bench_files_document_fragment::html/minify/document_fragment

41.3 ms41.3 ms

es/codegen/colors

crates/swc_ecma_codegen/benches/bench.rs::benches::bench_cases

68.4 µs68.4 µs

es2015_spread

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

272.5 µs272.3 µs

stackoverflow

crates/swc_html_minifier/benches/full.rs::files_document::bench_files_document::html/minify/document

35.8 ms35.8 ms

parse_and_babelify_mootools

crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases

72.4 ms72.4 ms

parse_and_babelify_angular

crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases

159.5 ms159.4 ms

parse_and_babelify_yui

crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases

67.2 ms67.1 ms

es/parser/jquery mobile

crates/swc_ecma_parser/benches/parser.rs::benches::bench_files

21.3 ms21.3 ms

es/minifier/libs/react

crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs

19.6 ms19.5 ms

es/lexer/three

crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files

17.4 ms17.4 ms

html/parser/parser_document/css_2021_spec

crates/swc_html_parser/benches/parser.rs::benches::bench_files

71 ms71 ms

es/minifier/libs/jquery

crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs

96.8 ms96.7 ms

es/parser/backbone

crates/swc_ecma_parser/benches/parser.rs::benches::bench_files

2.7 ms2.7 ms

es/fixer/typescript

crates/swc_ecma_transforms_base/benches/base.rs::benches::bench_cases

201.8 ms201.8 ms

es/lints/libs/echarts

crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs

114.3 ms114.3 ms

css/visitor/compare/clone

crates/swc_css_parser/benches/compare.rs::benches::bench_cases

4.8 ms4.8 ms

typescript/fast-strip

crates/swc_ts_fast_strip/benches/assets.rs::benches::fast_ts

417.9 µs417.8 µs

html/document_fragment/visitor/compare/visit_mut_span

crates/swc_html_parser/benches/compare.rs::benches::bench_cases

1.1 ms1.1 ms

html/document/visitor/compare/visit_mut_span

crates/swc_html_parser/benches/compare.rs::benches::bench_cases

1.1 ms1.1 ms

github

crates/swc_html_minifier/benches/full.rs::files_document::bench_files_document::html/minify/document

42 ms42 ms

es/lints/libs/victory

crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs

70.8 ms70.7 ms

css/visitor/compare/fold_span

crates/swc_css_parser/benches/compare.rs::benches::bench_cases

5.8 ms5.8 ms

es/parser/mootools

crates/swc_ecma_parser/benches/parser.rs::benches::bench_files

10.8 ms10.8 ms

html/document_fragment/visitor/compare/fold_span

crates/swc_html_parser/benches/compare.rs::benches::bench_cases

1.2 ms1.2 ms

es/lints/libs/vue

crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs

8.3 ms8.3 ms

es/minifier/libs/typescript

crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs

3.8 s3.8 s

es/parser/three

crates/swc_ecma_parser/benches/parser.rs::benches::bench_files

66 ms66 ms

es2015_fn_name

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

280.5 µs280.5 µs

html/document/visitor/compare/fold_span_panic

crates/swc_html_parser/benches/compare.rs::benches::bench_cases

1.2 ms1.2 ms

es/minifier/libs/vue

crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs

143.1 ms143.1 ms

css/visitor/compare/visit_mut_span

crates/swc_css_parser/benches/compare.rs::benches::bench_cases

5.1 ms5.1 ms

html/document/visitor/compare/visit_mut_span_panic

crates/swc_html_parser/benches/compare.rs::benches::bench_cases

1.1 ms1.1 ms

html/document_fragment/visitor/compare/visit_mut_span_panic

crates/swc_html_parser/benches/compare.rs::benches::bench_cases

1.1 ms1.1 ms

es/target/es2015

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::version_group

1.2 ms1.2 ms

es/parser/yui

crates/swc_ecma_parser/benches/parser.rs::benches::bench_files

10.5 ms10.5 ms

es/transform/baseline/common_reserved_word

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::baseline_group

278.9 µs278.8 µs

html/document/visitor/compare/clone

crates/swc_html_parser/benches/compare.rs::benches::bench_cases

1 ms1 ms

es/resolver/typescript

crates/swc_ecma_transforms_base/benches/base.rs::benches::bench_cases

243.4 ms243.4 ms

es/parser/typescript

crates/swc_ecma_parser/benches/parser.rs::benches::bench_files

369.7 ms369.7 ms

css/parser/tailwind_3_1_1

crates/swc_css_parser/benches/parser.rs::benches::bench_files

7.2 ms7.2 ms

html/document/visitor/compare/fold_span

crates/swc_html_parser/benches/compare.rs::benches::bench_cases

1.2 ms1.2 ms

css_spec

crates/swc_html_minifier/benches/full.rs::files_document::bench_files_document::html/minify/document

195.3 ms195.3 ms

es/lexer/typescript

crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files

103.3 ms103.3 ms

es/lexer/mootools

crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files

3.3 ms3.3 ms

es/lexer/backbone

crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files

803.8 µs803.7 µs

es/lints/libs/typescript

crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs

276.3 ms276.3 ms

es/lexer/yui

crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files

3.6 ms3.6 ms

css/lexer/tailwind_3_1_1

crates/swc_css_parser/benches/lexer.rs::benches::bench_files

1.8 ms1.8 ms

es/visitor/compare/clone

crates/swc_ecma_parser/benches/compare.rs::benches::bench_cases

5.5 ms5.5 ms

html/document_fragment/visitor/compare/fold_span_panic

crates/swc_html_parser/benches/compare.rs::benches::bench_cases

1.2 ms1.2 ms

es/resolver_with_hygiene/typescript

crates/swc_ecma_transforms_base/benches/base.rs::benches::bench_cases

747 ms747 ms

es/codegen/large

crates/swc_ecma_codegen/benches/bench.rs::benches::bench_cases

639.9 µs639.9 µs

html/lexer/css_2021_spec

crates/swc_html_parser/benches/lexer.rs::benches::bench_files

38.7 ms38.7 ms

css/lexer/foundation_6_7_4

crates/swc_css_parser/benches/lexer.rs::benches::bench_files

9.3 ms9.3 ms

html/lexer/github_com_17_05_2022

crates/swc_html_parser/benches/lexer.rs::benches::bench_files

14 ms14 ms

css/lexer/bootstrap_5_1_3

crates/swc_css_parser/benches/lexer.rs::benches::bench_files

11.3 ms11.3 ms

html/lexer/stackoverflow_com_17_05_2022

crates/swc_html_parser/benches/lexer.rs::benches::bench_files

14 ms14 ms

es/lexer/jquery mobile

crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files

6.6 ms6.6 ms

es/target/es3

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::version_group

399.1 µs399.1 µs

es/lexer/angular

crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files

5.8 ms5.8 ms

css/visitor/compare/visit_mut_span_panic

crates/swc_css_parser/benches/compare.rs::benches::bench_cases

5.1 ms5.1 ms

css/visitor/compare/fold_span_panic

crates/swc_css_parser/benches/compare.rs::benches::bench_cases

5.8 ms5.8 ms

html/parser/parser_document_fragment/stackoverflow_com_17_05_2022

crates/swc_html_parser/benches/parser.rs::benches::bench_files

22.2 ms22.2 ms

css/parser/bootstrap_5_1_3

crates/swc_css_parser/benches/parser.rs::benches::bench_files

46.9 ms46.9 ms

es/lexer/cal-com

crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files

12.6 ms12.6 ms

css/parser/foundation_6_7_4

crates/swc_css_parser/benches/parser.rs::benches::bench_files

37.2 ms37.2 ms

es/visitor/compare/visit_mut_span_panic

crates/swc_ecma_parser/benches/compare.rs::benches::bench_cases

6 ms6 ms

es/parser/underscore

crates/swc_ecma_parser/benches/parser.rs::benches::bench_files

2.3 ms2.3 ms

es/lexer/jquery

crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files

4.3 ms4.3 ms

es/minifier/libs/moment

crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs

62.6 ms62.6 ms

es/codegen/with-parser/large

crates/swc_ecma_codegen/benches/with_parse.rs::benches::bench_cases

1.1 ms1.1 ms

es/visitor/compare/visit_mut_span

crates/swc_ecma_parser/benches/compare.rs::benches::bench_cases

6 ms6 ms

parse_and_babelify_underscore

crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases

13 ms13 ms

es2015_shorthand_property

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

273.3 µs273.3 µs

es/visitor/compare/fold_span_panic

crates/swc_ecma_parser/benches/compare.rs::benches::bench_cases

6.8 ms6.8 ms

es/lints/libs/moment

crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs

4.2 ms4.2 ms

es/visitor/compare/fold_span

crates/swc_ecma_parser/benches/compare.rs::benches::bench_cases

6.8 ms6.8 ms

html/parser/parser_document/github_com_17_05_2022

crates/swc_html_parser/benches/parser.rs::benches::bench_files

22.1 ms22.1 ms

parse_and_babelify_jquery_mobile

crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases

169.2 ms169.3 ms

es/lexer/underscore

crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files

682.9 µs683 µs

es/lints/libs/react

crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs

1.3 ms1.3 ms

html/parser/parser_document/stackoverflow_com_17_05_2022

crates/swc_html_parser/benches/parser.rs::benches::bench_files

22.2 ms22.2 ms

es/hygiene/typescript

crates/swc_ecma_transforms_base/benches/base.rs::benches::bench_cases

422.5 ms422.6 ms

es/parser/jquery

crates/swc_ecma_parser/benches/parser.rs::benches::bench_files

13.7 ms13.7 ms

html/parser/parser_document_fragment/css_2021_spec

crates/swc_html_parser/benches/parser.rs::benches::bench_files

70.6 ms70.7 ms

es/transform/baseline/base

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::baseline_group

259.8 µs259.8 µs

es/parser/cal-com

crates/swc_ecma_parser/benches/parser.rs::benches::bench_files

56 ms56 ms

html/parser/parser_document_fragment/github_com_17_05_2022

crates/swc_html_parser/benches/parser.rs::benches::bench_files

22.1 ms22.1 ms

es/parser/angular

crates/swc_ecma_parser/benches/parser.rs::benches::bench_files

16.8 ms16.8 ms

es/lints/libs/antd

crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs

156.3 ms156.4 ms

es/lints/libs/jquery

crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs

6.5 ms6.5 ms

es2015_block_scoped_fn

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

291.6 µs291.7 µs

es/codegen/with-parser/colors

crates/swc_ecma_codegen/benches/with_parse.rs::benches::bench_cases

155.4 µs155.5 µs

es/lints/libs/lodash

crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs

6.2 ms6.2 ms

es/minifier/libs/antd

crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs

1.9 s1.9 s

css_spec

crates/swc_html_minifier/benches/full.rs::files_document_fragment::bench_files_document_fragment::html/minify/document_fragment

195.1 ms195.3 ms

es/minifier/libs/echarts

crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs

1.5 s1.5 s

es/lexer/colors

crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files

24.9 µs24.9 µs

es2015_arrow

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

299.6 µs300 µs

es/transform/baseline/common_typescript

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::baseline_group

370.6 µs371.1 µs

es2015_for_of

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

292.9 µs293.3 µs

es2015_instanceof

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

277.6 µs278.3 µs

es2015_computed_props

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

273.9 µs274.8 µs

es2016_exponentiation

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

295.3 µs296.5 µs

es2015_sticky_regex

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

275.3 µs276.5 µs

es2015_typeof_symbol

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

276.3 µs277.7 µs

es2017_async_to_generator

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

295.5 µs296.9 µs

es/target/es2020

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::version_group

-1%

477.5 µs480.3 µs

es/target/es2018

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::version_group

-1%

331.2 µs333.9 µs

es/target/es2017

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::version_group

-1%

296.8 µs299.4 µs

es2018_object_rest_spread

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

-1%

301.7 µs304.5 µs

es/target/es2016

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::version_group

-1%

295.9 µs298.9 µs

es/full-target/es2018

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::full_group

-1%

568.4 µs575 µs

es2019_optional_catch_binding

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group

-1%

286.8 µs290.3 µs

es/full-target/es2017

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::full_group

-1%

597.7 µs606.7 µs

es/full-target/es2016

crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::full_group

-2%

629.4 µs641 µs

Ignored

es/preset-env/entry/import

crates/swc_ecma_preset_env/benches/polyfills.rs::benches::bench_cases

Ignored

+5%

28.8 µs27.5 µs

Commits

Click on a commit to change the comparison range

Base

main

57a8731

+8.76%

compat

332df2f

14 hours ago

by kdy1

-2.91%

feat(es/transformer): Implement nullish coalescing pass Implement the nullish coalescing operator (??) and nullish coalescing assignment (??=) transformation following the new hook-based architecture. Key features: - Implements VisitMutHook<TraverseCtx> instead of VisitMut - Transforms `a ?? b` to conditional expressions with proper null/undefined checks - Handles nullish coalescing assignment `a ??= b` - Uses temporary variables to avoid side effects in complex expressions - Supports no_document_all assumption for simplified transformations - Properly tracks statement addresses for variable injection The implementation is based on the Babel plugin and passes all existing tests. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>

d357393

13 hours ago

by kdy1

-1.21%

es2020

ada724d

9 hours ago

by kdy1

+0.17%

Create tiny-zebras-bake.md

15f0d91

9 hours ago

by kdy1

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