PCat-DNest is a probabilistic astronomy image cataloger (finds stars in telescopy images). As an experiment, I optimized PCat to see how much performance was left on the table. A fair bit. I managed a 340% speedup!
Read about how I managed the 3.4x speed boost here: http://vt200.com/perf-tuning-pcat-dnest
PCat is a project of @stephenportillo and is available here: https://github.com/stephenportillo/pcat-dnest
@stephenportillo implemented PCat using
Bayesian sampling projects by @eggplantbren