# Introducing UltrafastSecp256k1: A Multi-Architecture Exploration of Secp256k1 Optimizations

**URL:** <https://delvingbitcoin.org/t/introducing-ultrafastsecp256k1-a-multi-architecture-exploration-of-secp256k1-optimizations/2280>\
**Category:** Implementation\
**Tags:** bitcoin-core, taproot, wallet\
**Created:** [February 22, 2026, 11:57am UTC](https://delvingbitcoin.org/t/introducing-ultrafastsecp256k1-a-multi-architecture-exploration-of-secp256k1-optimizations/2280 "2026-02-22T11:57:49Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![shrec](https://delvingbitcoin.org/user_avatar/delvingbitcoin.org/shrec/32/1856_2.png) [@shrec](https://delvingbitcoin.org/u/shrec)\
**Post date:** [March 8, 2026, 9:44pm UTC](https://delvingbitcoin.org/t/introducing-ultrafastsecp256k1-a-multi-architecture-exploration-of-secp256k1-optimizations/2280/5 "2026-03-08T21:44:19Z")

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Cumulative release: v3.14.0 → v3.21.0 120+ commits ABI compatible No breaking changes — drop-in upgrade from v3.14.x

Highlights: • Bernstein‑Yang SafeGCD constant‑time scalar inverse • 6.4× faster ct::scalar\_inverse • ~43% faster constant‑time ECDSA signing • RISC‑V constant‑time timing leak fixes • strict BIP‑340 parsing • expanded audit infrastructure • reproducible Docker CI • cross‑platform benchmarks on x86‑64, ARM64, RISC‑V and ESP32

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_[View the full topic](https://delvingbitcoin.org/t/introducing-ultrafastsecp256k1-a-multi-architecture-exploration-of-secp256k1-optimizations/2280)._