Le mar. 26 févr. 2019 à 12:33, INADA Naoki firstname.lastname@example.org a écrit :
- unpickle_list: 8.48 us +- 0.09 us -> 12.8 us +- 0.5 us: 1.52x slower (+52%)> ...
... unpickle and unpickle_list shows massive slowdown. I suspect this slowdown is not caused from set change. Linux perf shows many pagefault is happened in pymalloc_malloc. I think memory usage changes hit weak point of pymalloc accidentally. I will try to investigate it.
Please contact me to get access to speed.python.org server. *Maybe* your process to run benchmarks is not reliable and you are getting "noise" in results.
On the other hand, meteor_contest shows 13% speedup. It uses set. Other doesn't show significant performance changes.
I recall that some benchmarks are unstable and depend a lot on how you run the benchmark, how Python is compiled (ex: PGO or not).
IMHO it's fine if the overall performance result is "no significant change", as soon as we reduce the memory footprint.