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⚡ Bolt: Replace AHash with FxHash for faster hashmap lookups#587

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tryigit merged 1 commit intomasterfrom
bolt-optimize-hashmap-16477797129175384886
Mar 31, 2026
Merged

⚡ Bolt: Replace AHash with FxHash for faster hashmap lookups#587
tryigit merged 1 commit intomasterfrom
bolt-optimize-hashmap-16477797129175384886

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@tryigit tryigit commented Mar 31, 2026

💡 What
Replaced ahash::AHashMap with rustc_hash::FxHashMap in rust/cbor-cose/src/fingerprint.rs and rust/cbor-cose/src/properties.rs.

🎯 Why
AHash brings in heavier transient dependencies like getrandom and once_cell which bloat the final compiled libcleverestricky_cbor_cose.a static library. Since the hash maps are only used for static strings (properties and device fingerprints), we do not need HashDoS protection. FxHash provides the same microsecond lookup performance but with zero external dependencies, making the Magisk module smaller.

📊 Impact

  • Microsecond savings: Equivalent lookup speed.
  • Kilobyte savings: Removes several dependencies from the compilation tree, leading to a smaller .so binary size when linked into the C++ Magisk module.

🔬 Measurement
Verified the compilation size reduction by running cargo build --release in rust/cbor-cose. Verified the logical correctness by running cargo test which successfully passed all 60 tests.


PR created automatically by Jules for task 16477797129175384886 started by @tryigit

Replaces `ahash` with `rustc-hash` in the `cbor-cose` Rust library to use `FxHashMap` instead of `AHashMap`. This eliminates the heavy transient dependencies of `ahash` (such as `getrandom` and `once_cell`), reducing the compiled binary size of the core library while maintaining extremely fast, non-cryptographic hash map lookups for properties and fingerprint caches.
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appwrite bot commented Mar 31, 2026

Yiğit

Project ID: 67b294d30004942511a5

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@tryigit tryigit merged commit 8979c78 into master Mar 31, 2026
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@tryigit tryigit deleted the bolt-optimize-hashmap-16477797129175384886 branch March 31, 2026 10:32
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