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diff --git a/plugins/rake-fast/README.md b/plugins/rake-fast/README.md
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+# rake-fast
+
+Fast rake autocompletion plugin.
+
+This script caches the output for later usage and significantly speeds it up. It generates a .rake_tasks cache file in parallel to the Rakefile. It also checks the file modification dates to see if it needs to regenerate the cache file.
+
+This is entirely based on [this pull request by Ullrich Schäfer](https://github.com/robb/.dotfiles/pull/10/), which is inspired by [this Ruby on Rails trick from 2006](http://weblog.rubyonrails.org/2006/3/9/fast-rake-task-completion-for-zsh/).
+
+Think about that. 2006.
+
+## Installation
+
+Just add the plugin to your `.zshrc`:
+
+```bash
+plugins=(foo bar rake-fast)
+```
+
+You might consider adding `.rake_tasks` to your [global .gitignore](https://help.github.com/articles/ignoring-files#global-gitignore)
+
+## Usage
+
+`rake`, then press tab
diff --git a/plugins/rake-fast/rake-fast.plugin.zsh b/plugins/rake-fast/rake-fast.plugin.zsh
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+++ b/plugins/rake-fast/rake-fast.plugin.zsh
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+_rake_refresh () {
+  if [ -f .rake_tasks ]; then
+    rm .rake_tasks
+  fi
+  echo "Generating .rake_tasks..." > /dev/stderr
+  _rake_generate
+  cat .rake_tasks
+}
+
+_rake_does_task_list_need_generating () {
+  if [ ! -f .rake_tasks ]; then return 0;
+  else
+    if [[ "$OSTYPE" = darwin* ]]; then
+      accurate=$(stat -f%m .rake_tasks)
+      changed=$(stat -f%m Rakefile)
+    else
+      accurate=$(stat -c%Y .rake_tasks)
+      changed=$(stat -c%Y Rakefile)
+    fi
+    return $(expr $accurate '>=' $changed)
+  fi
+}
+
+_rake_generate () {
+  rake --silent --tasks | cut -d " " -f 2 > .rake_tasks
+}
+
+_rake () {
+  if [ -f Rakefile ]; then
+    if _rake_does_task_list_need_generating; then
+      echo "\nGenerating .rake_tasks..." > /dev/stderr
+      _rake_generate
+    fi
+    compadd `cat .rake_tasks`
+  fi
+}
+
+compdef _rake rake
+alias rake_refresh='_rake_refresh'