hayes:canary - Branch - vercel/next.js - CodSpeed

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Turbopack: Fix compound assignment expression evaluation

#85478Merged

Comparing

hayes:canary

(

f308f17

) with

hayes/compound-assignment

(

1db1762

)

-7%

Regressions: 1

Untouched: 7

Skipped: 12

No successful run was found on hayes/compound-assignment ( 137dbec) during the generation of this report, so canary ( 1db1762) was used instead as the comparison base. There might be some changes unrelated to this pull request in this report.

Benchmarks

Skipped (12)

These benchmarks were skipped, so their baseline results are used instead. If they were deleted in your codebase, archive them to remove them from the performance reports.
Learn more about archiving benchmarks

hmr_updates_medium_10

crates/next-api/benches/hmr.rs

IgnoredSkipped

17.2 µs*

hmr_updates_large_20

crates/next-api/benches/hmr.rs

IgnoredSkipped

16.9 µs*

hmr_updates_small_5

crates/next-api/benches/hmr.rs

IgnoredSkipped

16.8 µs*

build[shiki]

turbopack/crates/turbopack-cli/benches/small_apps.rs::benches::bench_small_apps::turbopack/build/apps

Skipped

5.5 s*

build[date-fns-all]

turbopack/crates/turbopack-cli/benches/small_apps.rs::benches::bench_small_apps::turbopack/build/apps

Skipped

2.3 s*

build[framer-motion-all]

turbopack/crates/turbopack-cli/benches/small_apps.rs::benches::bench_small_apps::turbopack/build/apps

Skipped

3.1 s*

build[date-fns-single]

turbopack/crates/turbopack-cli/benches/small_apps.rs::benches::bench_small_apps::turbopack/build/apps

Skipped

1.4 s*

build[framer-motion-single]

turbopack/crates/turbopack-cli/benches/small_apps.rs::benches::bench_small_apps::turbopack/build/apps

Skipped

2.2 s*

build[joy]

turbopack/crates/turbopack-cli/benches/small_apps.rs::benches::bench_small_apps::turbopack/build/apps

Skipped

2.1 s*

build[lucide-react-all]

turbopack/crates/turbopack-cli/benches/small_apps.rs::benches::bench_small_apps::turbopack/build/apps

Skipped

8.7 s*

build[lucide-react-single]

turbopack/crates/turbopack-cli/benches/small_apps.rs::benches::bench_small_apps::turbopack/build/apps

Skipped

950 ms*

build[mui]

turbopack/crates/turbopack-cli/benches/small_apps.rs::benches::bench_small_apps::turbopack/build/apps

Skipped

3.2 s*

Failed

react-dom-client.development.js[full]

turbopack/crates/turbopack-ecmascript/benches/references.rs::references_benches::benchmark::references

Regression

-7%

427.9 ms461.5 ms

Passed

jsonwebtoken.js[tracing]

turbopack/crates/turbopack-ecmascript/benches/references.rs::references_benches::benchmark::references

+1%

327.5 ms324.5 ms

app-page-turbo.runtime.prod.js[full]

turbopack/crates/turbopack-ecmascript/benches/references.rs::references_benches::benchmark::references

0%

780.5 ms777.3 ms

app-page-turbo.runtime.prod.js[tracing]

turbopack/crates/turbopack-ecmascript/benches/references.rs::references_benches::benchmark::references

0%

670.6 ms668.3 ms

packages-bundle.js[tracing]

turbopack/crates/turbopack-ecmascript/benches/references.rs::references_benches::benchmark::references

0%

1.1 s1.1 s

jsonwebtoken.js[full]

turbopack/crates/turbopack-ecmascript/benches/references.rs::references_benches::benchmark::references

0%

367.9 ms366.8 ms

react-dom-client.development.js[tracing]

turbopack/crates/turbopack-ecmascript/benches/references.rs::references_benches::benchmark::references

0%

407.2 ms406 ms

packages-bundle.js[full]

turbopack/crates/turbopack-ecmascript/benches/references.rs::references_benches::benchmark::references

0%

1.3 s1.3 s

Commits

Click on a commit to change the comparison range

Base

canary

1db1762

+8.56%

Turbopack: Fix compound assignment expression evaluation Previously, the analyzer treated all assignment expressions the same way, evaluating them as their right-hand side value. This was incorrect for compound assignments (+=, -=, *=, |=, >>=, etc.), which compute a new value based on both the left and right operands. This commit distinguishes between simple assignments (=) and compound assignments. Simple assignments continue to evaluate to the right-hand side, while compound assignments are now properly marked as unknown values with side effects. Also adds tests for compound assignments in conditionals, covering bitshift operations (>>=, <<=, >>>=) and bitwise operations (|=, &=, ^=) with both numbers and bigints.

9197606

6 days ago

by hayes

-15.84%

Merge branch 'canary' into canary

f308f17

4 days ago

by ijjk

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