Experiments with new low latency PyPy garbage collector in a thread.
TLDR; less performance spikes, faster average performance, PyPy is a good Python for games and multimedia apps on desktop systems, running GC in a thread is a good idea for GIL releasing apps. In March 2018 at the PyPy winter sprint I spent some days working on improving pygame support on PyPy. Part of this was investigating pypy frame drop . In there I found PyPy had both lower average performance in this pygame-using-CPython-API benchmark, and had spikes which caused frame drops. Remember that in latency sensitive applications performance spikes are not allowed. Note that not very much of this code is pure python (where PyPy is fastest), so it's almost a worst case benchmark for PyPy performance. Thanks to Antonio, the PyPy team and their supporters — things have much improved since then. One improvement in particular is that PyPy now allows more control of when the Garbage Collection does its work. Read more about it in the blog post " PyPy for low latency systems ...
