# ruby-1.9.3-p448 cumulative performance patch for rbenv

(I guarantee nothing. No warranty I am not responsible blah blah blah. Seems to work great for me so far. Thanks to Tyler Bird who I forked this from.)

This installs a patched ruby 1.9.3-p448 with the railsexpress patchsets: https://github.com/skaes/rvm-patchsets

### Requirements

* [rbenv](https://github.com/sstephenson/rbenv/)
* [ruby-build](https://github.com/sstephenson/ruby-build/)

You will also need a C Compiler. If you're on Linux, you probably already have one or know how to install one. On OS X, you should install XCode, and `brew install autoconf` using [homebrew](https://github.com/mxcl/homebrew).

### BONUS!

Putting the following in your shell config (eg. `~/.bash_profile`) will make Rails even faster, but will increase its memory footprint. For most applications, this will probably work well for you:

    export RUBY_GC_MALLOC_LIMIT=60000000
    export RUBY_FREE_MIN=200000

If you have a particularly large rails app (say, >100k lines), this seems to improve it even more:

    export RUBY_GC_MALLOC_LIMIT=1000000000
    export RUBY_FREE_MIN=500000
    export RUBY_HEAP_MIN_SLOTS=40000

### More BONUS!

If you're feeling adventurous, you can set some additional compile flags before you run the command above. These may cause the build to fail. If so, you can try again without the `march` flag, and it'll probably work. **This generally makes my ruby ~1.5% faster**. See http://www.opikdesign.com/kios/procie_kernel/ for more guidance on ``-march`` value.

    export CFLAGS="-march=core2 -O3 -pipe -fomit-frame-pointer"

This has to be run *BEFORE* you compile ruby.

### Even MORE BONUS!

Users who have installed libreadline and openssl via homebrew will find these libraries linked automatically. No need to specify any CONFIGURE_OPTS!

### Ok, let's do this!

```sh
curl https://raw.github.com/gist/5928282/rbenv.sh | sh ; rbenv global 1.9.3-p448-railsexpress
```