CSS 预处理器速度大比拼，Sass 最慢，Stylus 最快！
Results
The timings for processing a 200 KB file of plain CSS (lower is better):
Sass: 4.9 sec
Sass: 2.5 sec (with warm .sass-cache)
libsass: 0.2 sec
Stylus: 1.7 sec
Rework: 0.2 sec
LESS: 0.5 sec
r.js: 0.2 sec
Libsass (a C++ implementation of Sass) and Rework turn out to be extremely fast.
阅读详情 -> CSS Preprocessor Benchmark.