SIMD Everywhere Optimization from ARM Neon to RISC-V Vector Extensions

This page summarizes the projects mentioned and recommended in the original post on news.ycombinator.com

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  1. highway

    Performance-portable, length-agnostic SIMD with runtime dispatch

    Interesting, thanks for sharing :)

    At the time we open-sourced Highway, the standardization process had already started and there were some discussions.

    I'm curious why stdlib is the only path you see to default? Compare the activity level of https://github.com/VcDevel/std-simd vs https://github.com/google/highway. As to open-source usage, after years of std::experimental, I see <200 search hits [1], vs >400 for Highway [2], even after excluding several library users.

    But that aside, I'm not convinced standardization is the best path for a SIMD library. We and external users extend Highway on a weekly basis as new use cases arise. What if we deferred those changes to 3-monthly meetings, or had to wait for one meeting per WD, CD, (FCD), DIS, (FDIS) stage before it's standardized? Standardization seems more useful for rarely-changing things.

    1: https://sourcegraph.com/search?q=context:global+std::experim...

    2: https://sourcegraph.com/search?q=context:global+HWY_NAMESPAC...

  2. Stream

    Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.

    Stream logo
  3. OpenCV

    Open Source Computer Vision Library

  4. amh-code

    Complete implementations from "Algorithms for Modern Hardware"

    https://en.algorithmica.org/hpc/ and http://0x80.pl/ have some stuff about this, but the latter can be dense. I've had fun getting my hands dirty with some problems at https://highload.fun/ but there's not much direction unless you go to the telegram chat and ask people questions.

  5. std-simd

    std::experimental::simd for GCC [ISO/IEC TS 19570:2018]

    Interesting, thanks for sharing :)

    At the time we open-sourced Highway, the standardization process had already started and there were some discussions.

    I'm curious why stdlib is the only path you see to default? Compare the activity level of https://github.com/VcDevel/std-simd vs https://github.com/google/highway. As to open-source usage, after years of std::experimental, I see <200 search hits [1], vs >400 for Highway [2], even after excluding several library users.

    But that aside, I'm not convinced standardization is the best path for a SIMD library. We and external users extend Highway on a weekly basis as new use cases arise. What if we deferred those changes to 3-monthly meetings, or had to wait for one meeting per WD, CD, (FCD), DIS, (FDIS) stage before it's standardized? Standardization seems more useful for rarely-changing things.

    1: https://sourcegraph.com/search?q=context:global+std::experim...

    2: https://sourcegraph.com/search?q=context:global+HWY_NAMESPAC...

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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