github.com• 1d ago• 1 min read
Show HN: go-binsync – Go binary patches up to 67× smaller than bsdiffThis project is a little performance-optimization experiment focused on reducing the size of Go binary patches, which can be useful for quick incremental updates of live services.When a Go program grows by a few bytes through an incremental change, a bunch of related references and offsets throughout the compiled binary end up changing that makes general-purpose binary-diff encoders inefficient: `zstd --patch-from` produces a 530kb patch for a one-line change in a 30MB binary. bsdiff improves upon this (150KB patch) thanks to a delta compression algorithm that can handle relative offsets.go-binsync goes a step further for Go binaries by borrowing an idea from Courgette, the technique Google uses to ship Chrome updates: read the structure the compiler left behind, predict the expected results from that structure, and send only the correction. Courgette gets that structure by disassembling; go-binsync gets more detailed Go-specific structure from additional metadata embedded in every com
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