xsimd VS nsimd

Compare xsimd vs nsimd and see what are their differences.

xsimd

C++ wrappers for SIMD intrinsics and parallelized, optimized mathematical functions (SSE, AVX, AVX512, NEON, SVE)) (by xtensor-stack)
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xsimd nsimd
3 2
2,043 315
1.4% 1.6%
8.7 0.0
2 days ago over 2 years ago
C++ C
BSD 3-clause "New" or "Revised" License MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

xsimd

Posts with mentions or reviews of xsimd. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-12-03.

nsimd

Posts with mentions or reviews of nsimd. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-03-22.
  • SPO600 project part 1
    8 projects | dev.to | 22 Mar 2022
    I've decided to switch to something better, and after a few hours of searching, I found this repository: NSIMD https://github.com/agenium-scale/nsimd FastDifferentialCoding https://github.com/lemire/FastDifferentialCoding VS https://github.com/VcDevel/Vc XSIMD https://github.com/xtensor-stack/xsimd
  • All C++20 core language features with examples
    10 projects | news.ycombinator.com | 7 Apr 2021
    > - Waiting for Cross-Platform standardized SIMD vector datatypes

    which language has standardized SIMD vector datatypes ? most languages don't even have any ability to express SIMD while in C++ I can just use Vc (https://github.com/VcDevel/Vc), nsimd (https://github.com/agenium-scale/nsimd) or one of the other ton of alternatives, and have stuff that JustWorksTM on more architectures than most languages even support

    - Using nonstandard extensions, libraries or home-baked solutions to run computations in parallel on many cores or on different processors than the CPU

    what are the other native languages with a standardized memory model for atomics ? and, what's the problem with using libraries ? it's not like you're going to use C# or Java's built-in threadpools if you are doing any serious work, no ? Do they even have something as easy to use as https://github.com/taskflow/taskflow ?

    - Debugging cross-platform code using couts, cerrs and printfs

    because people never use console.log in JS or System.println in C# maybe ?

    - Forced to use boost for even quite elementary operations on std::strings.

    can you point to non-trivial java projects that do not use Apache Commons ? Also, the boost string algorithms are header-only so you will end up with exactly the same binaries that if it was in some std::string_algorithms namespace:

    https://gcc.godbolt.org/z/43vKadbde

What are some alternatives?

When comparing xsimd and nsimd you can also consider the following projects:

highway - Performance-portable, length-agnostic SIMD with runtime dispatch

simde - Implementations of SIMD instruction sets for systems which don't natively support them.

Vc - SIMD Vector Classes for C++

sleef - SIMD Library for Evaluating Elementary Functions, vectorized libm and DFT

libsimdpp - Portable header-only C++ low level SIMD library

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

FastDifferentialCoding - Fast differential coding functions (using SIMD instructions)

optuna - A hyperparameter optimization framework

VectorizedKernel - Running GPGPU-like kernels on CPU with auto-vectorization for SSE/AVX/AVX512 SIMD Architectures

highway - Highway - A Modern Javascript Transitions Manager