rails/rails — pull request #6645 by amatsuda (2012-06-06 12:36:03+00:00)
Title: Reduce number of String instance

Inspired by @elisehuard's GC talk at EuRuKo, I tried to reduce instances of `String` in Rails code.

I haven't done actual performance benchmarks, but number of `ObjectSpace.each_object(String).count` was significantly decreased on my simple test app.

```
before: 128696
after: 121995
```