This is one the reasons Hampton Catlin (the original author of Sass) created libsass, a port of Sass to C for portability. Check it out: https://github.com/hcatlin/libsass
After some brief testing: definitely. Faster than LESS by a good bit, too.
I'm not sure I'm going to use it, because of the compiled dependency (I'm on a Scala/Vert.x stack and I like being able to just check it out and hit "go"), but it's at least a practical option for me and I'm glad it exists.
Thanks!