@byroot has been posting a series on optimizations he and others have made to the json gem, and it’s been 🔥🔥🔥. Enjoyable and informative, I highly recommend reading what he’s posted so far. In his second post, he mentions the possibility of improving performance by adding an additional method cache. This would involve compiling respond_to? calls in a special way: It actually wouldn’t be too hard to add such a cache, we’d need to modify the Ruby compiler to compile respond_to?...
