--- title: Don’t Zip (GitHub Artifacts) in CI | daily.dev description: ZIP compression is single-threaded by default, making it a significant bottleneck when uploading large CI artifacts. Benchmarks on a ~1GB Chromium build show... canonical: https://daily.dev/posts/don-t-zip-github-artifacts-in-ci-pkhy424ik twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Don’t Zip (GitHub Artifacts) in CI | daily.dev og:description: ZIP compression is single-threaded by default, making it a significant bottleneck when uploading large CI artifacts. Benchmarks on a ~1GB Chromium build show... og:url: https://daily.dev/posts/don-t-zip-github-artifacts-in-ci-pkhy424ik og:image: https://api.daily.dev/og/posts/pkHY424ik.png og:image:alt: Don’t Zip (GitHub Artifacts) in CI og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Don’t Zip (GitHub Artifacts) in CI **[ITNEXT](https://daily.dev/sources/itnext)** · 2 min read · 0 upvotes · 0 comments ## Summary ZIP compression is single-threaded by default, making it a significant bottleneck when uploading large CI artifacts. Benchmarks on a ~1GB Chromium build show that switching from ZIP to pigz (parallel gzip) or zstd reduces compression time from 1m18s down to 21s or 5s respectively, with similar gains in decompression. In controlled CI environments where you own both ends of the pipeline, there is little reason to stick with ZIP. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [GitHub Actions now supports uploading and downloading non-zipped artifacts](https://daily.dev/posts/github-actions-now-supports-uploading-and-downloading-non-zipped-artifacts-punyxjzol) · GitHub Changelog · 0 upvotes · 0 comments - [LLVM To Begin Offering Zstd-Compressed Binaries For "Significantly Reduced" Downloads](https://daily.dev/posts/llvm-to-begin-offering-zstd-compressed-binaries-for-significantly-reduced-downloads-1hl7jbvjk) · Phoronix · 0 upvotes · 0 comments - [Build at Zepto Speed: How We Cut Frontend Webpack Build Times by 95%](https://daily.dev/posts/build-at-zepto-speed-how-we-cut-frontend-webpack-build-times-by-95--naalyyjoz) · Medium · 1 upvotes · 0 comments --- Tags: [#performance](https://daily.dev/tags/performance), [#cicd](https://daily.dev/tags/cicd), [#github-actions](https://daily.dev/tags/github-actions), [#compression](https://daily.dev/tags/compression) [View this post on daily.dev](https://daily.dev/posts/don-t-zip-github-artifacts-in-ci-pkhy424ik) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Don’t Zip (GitHub Artifacts) in CI","url":"https://daily.dev/posts/don-t-zip-github-artifacts-in-ci-pkhy424ik","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/don-t-zip-github-artifacts-in-ci-pkhy424ik"},"datePublished":"2026-02-25T15:00:28.695Z","dateModified":"2026-02-25T15:00:51.274Z","description":"ZIP compression is single-threaded by default, making it a significant bottleneck when uploading large CI artifacts. 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