As with all things, it depends on context. If you're trying to write a graphics or audio system in Ruby, this kind of thing can really matter. If you're writing

As with all things, it depends on context. If you're trying to write a graphics or audio system in Ruby, this kind of thing can really matter. If you're writing a Rails app, it's rounding error on the time waiting for I/O. Profiling is essential when figuring out how to improve your code. What we're doing here is explaining one weird benchmark result.