Hi Kevin. Those are most likely JIT spikes. We're working on reducing them
Cheers, fijal On Sat, Jan 10, 2015 at 8:57 AM, Kevin Ednalino <kcednal...@gmail.com> wrote: > Hi. I'm using PyPy3 in the context of a game engine and I'm getting these > spikes when timing it, such as: > > Engine: 3.0 ms > Engine: 3.9 ms > Engine: 3.0 ms > Engine: 7.9 ms > Engine: 25.1 ms > Engine: 2.2 ms > Engine: 2.2 ms > Engine: 3.1 ms > Engine: 3.0 ms > Engine: 4.2 ms > > When I run the engine on CPython 3, the timings are more consistent: > > Engine: 1.7 ms > Engine: 1.8 ms > Engine: 1.2 ms > Engine: 1.8 ms > Engine: 1.7 ms > Engine: 1.3 ms > Engine: 1.6 ms > Engine: 1.8 ms > Engine: 1.9 ms > Engine: 1.5 ms > > I've gotten spikes when timing much simpler things. I don't believe my code > is doing anything exceptional to cause the spikes. My educated guess is it's > due to the GC or more likely the JIT. When I run the engine with JIT off > like so, "pypy3 --jit off main.py", the spikes disappear (albeit not as fast > with it on). I've also been playing around with the minimark settings but no > luck so far; possibly tweaking the JIT settings might help. > > Any suggestions are welcomed :). > > Specifications: > > pypy3 --version: > Python 3.2.5 (b2091e973da69152b3f928bfaabd5d2347e6df46, Nov 18 2014, > 20:15:54) > [PyPy 2.4.0 with GCC 4.9.2] > > uname -a: > Linux archlinux 3.17.6-1-ARCH #1 SMP PREEMPT Sun Dec 7 23:43:32 UTC 2014 > x86_64 GNU/Linux > > Sincerely, > Kevin Ednalino > > _______________________________________________ > pypy-dev mailing list > pypy-dev@python.org > https://mail.python.org/mailman/listinfo/pypy-dev > _______________________________________________ pypy-dev mailing list pypy-dev@python.org https://mail.python.org/mailman/listinfo/pypy-dev
