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startCachedAsyncDownload's cached branch decoded the provider JSON into an
owned value and then rebuilt it entry by entry, recursively cloning every
package definition only to drop the original. Match the decoded value by
value instead. PHP hands the decoded array to the closure by COW, so no copy
happens there either.
laravel/framework require --no-install (warm cache, network disabled):
instructions:u 10276126917 -> 9884102191 (-3.8 %)
cycles:u 5048262624 -> 4777881212 (-5.4 %)
wall (hyperfine, 20 runs)
1.345 s +- 0.015 s -> 1.316 s +- 0.018 s (-2.2 %)
monolog/monolog is unchanged (100.7 ms -> 101.7 ms, within noise).
composer.lock is byte-identical for both packages.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Benchmarks were comparing against whatever composer happened to be on
PATH instead of the pinned submodule version, and paid the HTTP/3
fallback penalty from composer/composer#12987 on every packagist
request.
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Lighter-weight companion to scripts/bench/create-project.sh: compares
shirabe vs composer on dependency resolution alone (require --no-install
--no-audit), skipping the download/install step that dominates
create-project's runtime.
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