sstephenson/execjs — pull request #150 by josh (2014-06-05 22:06:28+00:00)
Title: Optimize: Generate compile substitution method

Multiple `dup` and `sub` calls on the runner source template get costly. Since the template syntax we use is basically a lightweight ruby interpolation, lets just treat the runner source templates as big heredocs that are evaluated in the `ExternalRunner` instance.