# Patched ruby 1.9.3-p125 for 30% faster rails boot

### What is?

This script installs a patched version of ruby 1.9.3-p125 with patches to make ruby-debug work again (#47) and boot-time performance improvements (#66 and #68), and runtime performance improvements (#83 and #84). It also includes the new backported GC from ruby-trunk.

Huge thanks to funny-falcon for the performance patches.

* https://github.com/ruby/ruby/pull/47
* https://github.com/ruby/ruby/pull/66
* https://github.com/ruby/ruby/pull/68
* https://github.com/ruby/ruby/pull/83
* https://github.com/ruby/ruby/pull/84

### What I need?

* rbenv
* ruby-build

OR 

* rvm

### How do I do?

If you're using **rbenv**:

```sh
curl https://raw.github.com/gist/1688857/rbenv.sh | sh
```

If you're using **rvm**:

```sh
rvm get head && rvm install 1.9.3-perf --patch falcon
```

### BONUS!

Putting the following in your shell config (eg. `~/.bash_profile`) will make Rails even faster, but will increase its memory footprint:

    export RUBY_HEAP_MIN_SLOTS=1000000
    export RUBY_HEAP_SLOTS_INCREMENT=1000000
    export RUBY_HEAP_SLOTS_GROWTH_FACTOR=1
    export RUBY_GC_MALLOC_LIMIT=1000000000
    export RUBY_HEAP_FREE_MIN=500000