JVM

If you are running on the JVM, The shim to a java SIMD netlib will generate warnings when it's instantiated. That shim looks for potential execution pathways upon instantiation, and prefers;

1. A JNI to C
2. Java SIMD
3. Fallback to vanilla Java

The console warnings on startup will tell you the implementations you are missing.

My understanding, is that for level 1 BLAS operations (i.e. this library), the performance of the SIMD implementation is comparable to native - i.e. C performance.

To enable the SIMD implementation, you'll need (at the time of writing) to enable the incubating vector API flags and be using JVM 18+. Consider adding this flag, to your JVM startup commands.

--add-modules=jdk.incubator.vector

JS

You'll need this or better, available somewhere in your bundle / build / browser / whatever.

{
  "dependencies": {
    "@stdlib/blas": "^0.1.1"
  }
}

If you aren't using a bundler, consider loading vs an ESModule and remapping the imports at link time through your build tool.

Worst case;

<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/blas@umd/browser.js"></script>

Native

Is less tested, but works according to the tests. You'll need CBLAS on the path one way or another.

Linux

On linux,

sudo apt-get install -y libatlas-base-dev

works, but not clear, if it's minimal.

MacOS

I believe ships with CBLAS available, so should work straight out the box.

Windows

You'll need CBLAS on the path (I think).