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changelog: add entry for "field: Remove x86_64 asm"

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Jonas Nick 2023-12-05 14:21:29 +00:00
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CHANGELOG.md
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@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
#### Changed
- The point multiplication algorithm used for ECDH operations (module `ecdh`) was replaced with a slightly faster one.
- Optional handwritten x86_64 assembly for field operations was removed because modern C compilers are able to output more efficient assembly. This change results in a significant speedup of some library functions when handwritten x86_64 assembly is enabled (`--with-asm=x86_64` in GNU Autotools, `-DSECP256K1_ASM=x86_64` in CMake), which is the default on x86_64. Benchmarks with GCC 10.5.0 show a 10% speedup for `secp256k1_ecdsa_verify` and `secp256k1_schnorrsig_verify`.
## [0.4.0] - 2023-09-04