Projects like this can help though. If your performance benchmark is, say, computational fluid dynamics, then then pure Python isn't going to fare well since l

Projects like this can help though. If your performance benchmark is, say, computational fluid dynamics, then then pure Python isn't going to fare well since languages with less overhead will be able to more efficiently leverage the available hardware. However, a text editor / IDE has relatively fixed performance requirements based on users' perception, such that selective optimization is tractable. Once an application can satisfy human expectations without devouring system resources, additional gains are moot.