Ruby's Inspect Considered Harmful

Excerpt: "There’s another, insidious drawback to the default inspect that leads to severe performance issues. Both NameError and NoMethodError call inspect when constructing their exception message, and there’s simply no way to monkeypatch around that ... The fact that it took 7 months for this fix to finally make it into Rails 3.2.3 stable (and yet be mysteriously absent from the changelog) is another story."