Check for known reusable types being implicitly wasted.

[NightlyNexus]

trafficstars

String.matches(), String.split(), and String.replaceAll() are prime examples of seductive convenience APIs. These are especially damaging, as they are commonly used in loops, where caching a Pattern is an easy fix. It'd be cool to have Error Prone complain about their usages and suggest using the Pattern APIs directly.

[davidburstrom]

Agreed, I just had a look at this in conjunction with the existing ConstantPatternCompile.