46d9a3cd1a
Because it's hot and the number of entries can reach the 1000s, so linear insertion and search is bad. This reduces runtime for `sqlite` and `UE4Game-HTML5-Shipping` by 3-4%, and a couple of other benchmarks (`sqlite`, `godot`, `clang`) by smaller amounts. It also increases runtime for `mono` and `tanks` by about 1%; this seems to be due to incidental changes in which functions are inlined more than algorithmic changes.