These benchmarks are informal and only intended to give us a general sense of the benefit Dart Sass could provide relative to other implementations.

This was tested against:

libsass 006bbf5 and sassc 66f0ef3 compiled with g++ (Debian 11.2.0-10) 11.2.0.
Dart Sass 4fa365a on Dart 2.15.0 (stable) (Fri Dec 3 14:23:23 2021 +0100) on "linux_x64" and Node v16.10.0.

on Debian x64 with Intel Core i7-8650U CPU @ 1.90GHz.

Measurements

I ran five instances of each configuration and recorded the fastest time.