feat/packaging: build Sourcegraph Git with zlib-ng - #16
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Object inflation is a significant part of Git runtime, and local benchmarking showed roughly 25% lower wall time with zlib-ng. Use its native API so it can coexist with ordinary zlib used by other dependencies, and link the pinned build statically to preserve relocatability. Share one checksum-verified dependency recipe across orb setup and Linux and macOS release builders, recording provenance and licensing in each archive. Keep plain orb make invocations on the same backend and verify that release artifacts neither acquire a dynamic zlib-ng dependency nor retain build-time macOS rpaths. Reserve sourcegraph/v2.55.0-3 for this follow-up so the stock-zlib v2.55.0-2 distribution can ship first. Sourcegraph Git distributions now use zlib-ng for faster object compression and decompression. Amp-Thread-ID: https://ampcode.com/threads/T-01a0863e-cefe-716b-a3d5-be8e3f40e19f Co-authored-by: Amp <amp@ampcode.com>
keegancsmith
marked this pull request as ready for review
September 10, 2026 13:06
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Builds Sourcegraph Git against the native zlib-ng API to improve object compression and decompression performance. Local packed-object benchmarking measured roughly 25% lower wall time, while static linking lets zlib-ng coexist with ordinary zlib used by other dependencies and preserves the archives’ relocatability.\n\nThe dependency is pinned by source commit and checksum through one recipe shared by orb setup and the Linux and macOS release builders. Archives record its provenance and license, and validation rejects dynamic zlib-ng dependencies or leaked macOS build rpaths. This advances the downstream identity to
2.55.0.sourcegraph.3after the stock-zlibv2.55.0-2release.