Just finished the RISC-V optimization sprint for Milk-V Mars (SiFive U74). Using U74-specific in-order scheduling gave us a 34% boost in verification speed. This is part of the v3.11 roadmap to make UltrafastSecp256k1 the go-to library for resource-constrained IoT devices. Cycles don't lie! 🚀

![](https://m.stacker.news/131458)

shrec

Zap 1000 sats on this comment, then maybe I'll believe you're Shrec! Hahaha

Thank you for the support and the sats, @0xbitcoiner and everyone!It’s exciting to see the community take interest in these optimizations. Our team has been working around the clock to push the boundaries of $secp256k1$ performance, especially for high-throughput environments.We just hit a major milestone with v3.10.x, achieving a +51% speedup in constant-time generator multiplication on x86-64 and significant gains on ARM64, all while passing 12,023 consistency tests.We are now focusing on v3.11, which will bring further refinements to Field Inversion and expanded hardware support for RISC-V. Feedback from this community is invaluable—feel free to dig into the code or the benchmarks on our GitHub.🚀 Onward to more speed and security!

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5f05a3a705

Introduction Hello everyone. I’ve been developing a high-throughput implementation called UltrafastSecp256k1. The project, which was open-sourced on February 11th, 2026, started as an exploration of how modern hardware features (SHA-NI, AVX2, ARM64 Assembly) can be leveraged to push the limits of ECC performance across diverse platforms—from high-end x86 servers to resource-constrained IoT devices like ESP32-S3 and RISC-V boards.

The goal is to create a highly portable, constant-time, and branchless library that is accessible through multiple language bindings (12+ languages including Rust, Go, Swift, and Dart). I am reaching out to this community for a technical audit, feedback on the cryptographic primitives, and suggestions on our constant-time implementation.

bitcoin

> *by shrec*
>
> Introduction Hello everyone. I’ve been developing a high-throughput implementation called UltrafastSecp256k1. The project, which was open-sourced on February 11th, 2026, started as an exploration of how modern hardware features (SHA-NI, AVX2, ARM64 Assembly) can be leveraged to push the limits of ECC performance across diverse platforms—from high-end x86 servers to resource-constrained IoT devices like ESP32-S3 and RISC-V boards.
>
>The goal is to create a highly portable, constant-time, and branchless library that is accessible through multiple language bindings (12+ languages including Rust, Go, Swift, and Dart). I am reaching out to this community for a technical audit, feedback on the cryptographic primitives, and suggestions on our constant-time implementation.
>
> [**...read more at delvingbitcoin.org**](https://delvingbitcoin.org/t/introducing-ultrafastsecp256k1-a-multi-architecture-exploration-of-secp256k1-optimizations/2280)