[codex] parallelize Windows compression - #27855
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Each Windows packaging job creates three compressed forms of five binaries in sequence. This takes roughly two minutes and is on the release critical path. Use two xargs workers to compress independent binaries concurrently. The workers only read the raw executables and write per-binary archive names. The Codex zip can safely read the helper executables while their own archives are generated. On a 16-vCPU AMD EPYC 9V74 Windows x64 release runner, alternating trials against artifacts from release run 27391514823 measured: serial: 121 s, 123 s, 121 s parallel: 73 s, 73 s, 74 s This saves 47 to 50 seconds in the x64 packaging lane, reducing the observed release critical path by about 48 seconds when x64 remains the limiting lane. https://github.com/openai/codex/actions/runs/27401905938
tamird
marked this pull request as ready for review
June 12, 2026 17:12
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Codex Review: Didn't find any major issues. 👍 Reviewed commit: ℹ️ About Codex in GitHubYour team has set up Codex to review pull requests in this repo. Reviews are triggered when you
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anp-oai
approved these changes
Jun 12, 2026
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Each Windows packaging job creates three compressed forms of five
binaries in sequence. This takes roughly two minutes and is on the
release critical path.
Use two xargs workers to compress independent binaries concurrently.
The workers only read the raw executables and write per-binary archive
names. The Codex zip can safely read the helper executables while their
own archives are generated.
On a 16-vCPU AMD EPYC 9V74 Windows x64 release runner, alternating
trials against artifacts from release run 27391514823 measured:
serial: 121 s, 123 s, 121 s
parallel: 73 s, 73 s, 74 s
This saves 47 to 50 seconds in the x64 packaging lane, reducing the
observed release critical path by about 48 seconds when x64 remains the
limiting lane.
https://github.com/openai/codex/actions/runs/27401905938