Hermes Memory Installer Adds Built-In Snapshot Compression and Restore Helpers

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The hermes-memory-installer package has received an update introducing two new helper functions for compressing and restoring Hermes JavaScript engine snapshots. The compressSnapshot helper converts a raw snapshot buffer into a compressed form, while restoreSnapshot decompresses and validates it for direct use by the Hermes runtime. Previously, developers had to manually handle compression using libraries like zlib, manage buffers, and reverse the process on restore. The new API integrates these steps into the installer's toolchain, offering consistent cross-environment behavior and expected compression ratios of roughly 3–5x for typical bytecode snapshots. This is particularly useful for React Native developers shipping over-the-air updates or working with constrained storage, as it reduces snapshot size without introducing new runtime dependencies.

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