This is a Go API backed by the native Dart Sass Embedded executable.

The primary motivation for this project is to provide SCSS support to Hugo. I welcome PRs with bug fixes. I will also consider adding functionality, but please raise an issue discussing it first.

For LibSass bindings in Go, see GoLibSass.

The benchmark below compares GoLibSass with this library. This is almost twice as fast when running single-threaded, but slower when running with multiple Goroutines. We're communicating with the compiler process via stdin/stdout, which becomes the serialized bottle neck here. That may be possible to improve, but for most practical applications (including Hugo), this should not matter.

Transpile/SCSS-16              770µs ± 0%     467µs ± 1%   -39.36%  (p=0.029 n=4+4)
Transpile/SCSS_Parallel-16    92.2µs ± 2%   362.5µs ± 1%  +293.39%  (p=0.029 n=4+4)

name                        old alloc/op   new alloc/op   delta
Transpile/SCSS-16               192B ± 0%     1268B ± 0%  +560.42%  (p=0.029 n=4+4)
Transpile/SCSS_Parallel-16      192B ± 0%     1272B ± 0%  +562.37%  (p=0.029 n=4+4)

name                        old allocs/op  new allocs/op  delta
Transpile/SCSS-16               2.00 ± 0%     19.00 ± 0%  +850.00%  (p=0.029 n=4+4)
Transpile/SCSS_Parallel-16      2.00 ± 0%     19.00 ± 0%  +850.00%  (p=0.029 n=4+4)