---------- Forwarded message ---------- From: Jens Nielsen <[email protected]> Date: Fri, Aug 15, 2014 at 10:05 PM Subject: Re: [IPython-dev] ipython slowdown with qt To: IPython developers list <[email protected]>
While I can reproduce the issue using %gui qt I can also reproduce it with the WX backend (%qui wx) with more or less the same symptoms. However, I don't see the issue with either of the 'tk' or the 'osx' backends. And yes the issue is reproducible in a python installation without any mpl installed. /Jens On Fri, Aug 15, 2014 at 9:22 PM, Eric Firing <[email protected]> wrote: > On 2014/08/15, 9:37 AM, Derek Homeier wrote: > > When using MPL with ipython —pylab and the Quartz version of PyQT4, > > the interpreter seems to be slow down extremely after running for a > > little while. Weirdly this is not connected to any graphics display > > and in fact happens even without any plotting window opened, i.e. the > > ipython shell just randomly becomes completely unresponsive and hangs > > for several seconds on simple tasks like typing or navigating through > > history. The plotting itself actually does not appear to perform any > > worse than it used to under Mountain Lion. > > [I'm switching the subject because my comments below relate to ipython > and matplotlib, and are no longer Anaconda-specific.] > > Derek, > > Thanks. A few days ago, when I switched from testing on linux to > testing on osx, exactly this ipython slowdown was happening to me--but I > lost track of what combination of versions and invocations was causing > it. Therefore I have been concentrating on the severe problem which > was, for me, 100% repeatable, and involved macosx backend, not Qt. I > expect the macosx-relatec problem will go away after Ilan uploads the > revised Anaconda ipython for python 3. > > Now I find I can repeat the ipython problem on Homebrew python 3 > (framework--with Quartz app) and Anaconda with the un-fixed ipython > (which is running without starting a Quartz app): > > ipython --pylab=qt > > Leave it alone for a bit. Try scrolling through history. Long delay, > even in responding to Ctrl-C. Evidently key events are stacking up and > not being processed. Now try: > > ipython > %pylab qt > > I see the slowdown with this, also. The response delay seems to get > worse with time. It renders the session unusable after only a few minutes. > > ipython > %gui qt > > And I still see it, so this appears to be a problem in ipython's PyQt4 > gui handling, not directly related to matplotlib. All on Mavericks, > running ipython from Apple's terminal. > > Eric > > > > > > _______________________________________________ > IPython-dev mailing list > [email protected] > http://mail.scipy.org/mailman/listinfo/ipython-dev >
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