feat(minifier): rewrite arguments copy loops to spread syntax

[sapphi-red]

Reverse-transpile rest argument code generated by TypeScript and babel.

Example input:

for (var e = arguments.length, r = Array(e), a = 0; a < e; a++)
  r[a] = arguments[a];

output:

var r = [...arguments];

It's a quite specific transform though.

[sapphi-red]

• feat(minifier): drop var r = [...arguments] if r is not used #13115
• feat(minifier): rewrite arguments copy loops to spread syntax #13114 👈 (View in Graphite)
• fix(minifier): keep Array reference id when compressing Array() #13113
• feat(minifier): compress Object(expr)(args) to (0, expr)(args) #13092
• main

---

How to use the Graphite Merge Queue

Add either label to this PR to merge it via the merge queue:

• 0-merge - adds this PR to the back of the merge queue
• hotfix - for urgent hot fixes, skip the queue and merge this PR next

You must have a Graphite account in order to use the merge queue. Sign up using this link.

An organization admin has enabled the Graphite Merge Queue in this repository.

Please do not merge from GitHub as this will restart CI on PRs being processed by the merge queue.

This stack of pull requests is managed by Graphite. Learn more about stacking.

[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #13114 will not alter performance

_{Comparing 08-15-feat_minifier_rewrite_arguments_copy_loops_to_spread_syntax (3d0d31a) with main (c661bac)¹}

Summary

✅ 34 untouched benchmarks

Footnotes

1. No successful run was found on main (3d0d31a) during the generation of this report, so c661bac was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[graphite-app]

Merge activity

• Aug 15, 1:03 PM UTC: Boshen added this pull request to the Graphite merge queue.
• Aug 15, 1:09 PM UTC: Merged by the Graphite merge queue.

[Copilot]

Copilot encountered an error and was unable to review this pull request. You can try again by re-requesting a review.