README.md in preval-0.1.0 vs README.md in preval-0.2.0

@@ -2,11 +2,11 @@
 
 `preval` is a gem that hooks into the Ruby compilation process and runs optimizations before it gets loaded by the virtual machine.
 
 Certain optimizations that are common in compilers are not immediately possible with Ruby on account of Ruby's flexibility. For example, most compilers will run through a process called [constant folding](https://en.wikipedia.org/wiki/Constant_folding) to eliminate the need to perform extraneous operations at runtime (e.g., `5 + 2` in the source can be replaced with `7`). However, because Ruby allows you to override the `Integer#+` method, it's possible that `5 + 2` would not evaluate to `7`. `preval` assumes that most developers will not override the `Integer#+` method, and performs optimizations under that assumption.
 
-Users must opt in to each of `preval`'s optimizations, as there's no real way of telling whether or not it is 100% safe for any codebase. The more optimizations are allowed to run, the most time and memory savings later. Users can also define their own optimizations by subclassing the `Preval::Visitor` class and using the existing `Preval::Node` APIs to replace and update the Ruby AST as necessary.
+Users must opt in to each of `preval`'s optimizations, as there's no real way of telling whether or not it is 100% safe for any codebase. The more optimizations are allowed to run, the more time and memory savings later. Users can also define their own optimizations by subclassing the `Preval::Visitor` class and using the existing `Preval::Node` APIs to replace and update the Ruby AST as necessary.
 
 ## Installation
 
 Add this line to your application's Gemfile:
 
@@ -22,12 +22,12 @@
 
     $ gem install preval
 
 ## Usage
 
-At the moment, this gem is a POC and should not be used in production. If you want to experiment with it, you can use the `bootsnap` gem to hook into the compilation process and run `Preval.process` over the source as it comes through. This will eventually be automated.
+If you're using the `bootsnap` gem, `preval` will automatically hook into its compilation step. Otherwise, you'll need to manually call `Preval.process(source)` with your own iseq loader (you can check out [yomikomu](https://github.com/ko1/yomikomu) for an example).
 
-Each optimization is generally named for the function it performs, and can be enabled through the `enable!` method on the visitor class.
+Each optimization is generally named for the function it performs, and can be enabled through the `enable!` method on the visitor class. If you do not explicitly call `enable!` on any optimizations, nothing will change with your source.
 
 * `Preval::Visitors::Arithmetic`
   * replaces constant expressions with their evaluation (e.g., `5 + 2` becomes `7`)
   * replaces certain arithmetic identities with their evaluation (e.g., `a * 1` becomes `a`)
 * `Preval::Visitors::Loops`