00:24 <dstufft> I don't really know how to narrow this down, however I have a branch were I'm trying to switch PyPI/Warehouse over to PyPy3. Using the PyPy3-6.0.0 (from docker if it matters) my tests run in a ~reasonable amount of time (5x slower than CPython, what I expected). If I try to download the nightly release (http://buildbot.pypy.org/nightly/py3.5/pypy-c-jit-95315-0a5cd8d36e99-linux64.tar.bz2) the tests are REALLY slow

00:24 <dstufft> like I got 19% way through running them, and it got mad and canceled it

00:25 <dstufft> and that was 20 minutes (instead of 200s, which is the PyPy3-6.0.0 runtime)

00:25 <dstufft> I was also having problems where the tests seemed to just randomly hang, although I can't tell if it was hanging or just doing something really slow (but if that's the case, it only sometimes happened)

00:26 <dstufft> I don't really know what to do about ^, I don't have nearly enough expertise in PyPy to even really know how to debug something like that... I assume it's not expected? Or do the nightlies act like that?

00:27 <njs> dstufft: fwiw, it's not a universal problem with the nightlies, e.g. here's a random recent run of trio's test suite: https://travis-ci.org/python-trio/trio/builds/453807815

00:28 <njs> running the tests on pypy is ~3x slower than cpython, but the release version, 3.5 nightly, and 3.6 nightly are all about the same

00:28 <dstufft> Yea, I expected the CPython -> PyPy slowdown

00:28 <dstufft> which was 40s -> 200s or so

00:29 <dstufft> but the PyPy3-6.0.0 -> Nightly slow down was 200s to 1114s before I killed it at ~19%

00:29 <njs> I guess one way to narrow it down would be to try a few different nightlies and see if it happens consistently

00:29 <dstufft> yea i guess that'll be my next step

00:30 <njs> you could even grab a nightly from around the time of th elast release, and if that doesn't have the issue then you could bisect it :-)

00:30 <njs> vmprof might give you some insight into where all that extra time is going too

00:31 <dstufft> well the nightly I used has a red thing next to it

00:31 <dstufft> and this nightly has a green thing next to it

00:31 <dstufft> maybe that matters!

00:39 <dstufft> Ok neat

00:40 <dstufft> http://buildbot.pypy.org/nightly/py3.5/pypy-c-jit-95312-3bb86a88e1d3-linux64.tar.bz2 works as expected

00:40 <dstufft> http://buildbot.pypy.org/nightly/py3.5/pypy-c-jit-95315-0a5cd8d36e99-linux64.tar.bz2 is slow af