sass/libsass — pull request #653 by xzyfer (2014-11-17 04:53:55+00:00)
Title: Fix bug with map key caching

This PR fixes a bug which meant hash for string keys in maps weren't be cached. This was causing massive performance issue.

```
➜ test ./test.sh
Libsass 3.0.2

real 0m0.942s
user 0m0.914s
sys 0m0.017s

Libsass 3.0.2 with fast maps

real 0m0.230s
user 0m0.213s
sys 0m0.015s

Ruby sass 3.4.6

real 0m1.241s
user 0m1.179s
sys 0m0.060s
```

**Summary**
```
Libsass 3.0.2 - 24% faster ruby
Libsass 3.0.2 with fast maps - 81% faster ruby
```