Did further testing. The problem is a power function of the number of layers.
QGIS 1.7 r15529M. # layers load time quit time 40 2.3s 1.6s 60 3.6s 3.4 s 68 4.8s 5.3s 76 6.2s 8.9s 84 7.9s 19.6s 92 10.9 36.7s 100 14.1s 57.7s 108 18.8s 82.2s QGIS 1.6 # layers load time quit time 108 3.6s instantaneous Both versions of QGIS using the same frameworks. Layer differences should not impact the times. The layers are in sets of 4 with the latter layer datasets added being very similar in the data they contain to the first layer datasets added. Royce On Mar 17, 2011, at 3:47 PM, William Kyngesburye wrote: > I tried running QGIS in 32bit mode with no difference in times. And my QGIS > 1.6 (assuming you're using that) is 64bit also. > > You could try it on your 1.7 build, if you compiled 32+64bit - Get Info on > QGIS.app in the Finder, check Open in 32-bit mode. > > On Mar 17, 2011, at 3:27 PM, Cline, Royce L. wrote: > >> Is this possibly a 64 bit issue. I am assuming Sandro's mini is an original >> core duo and therefore his build is 32 bit. Probably his test of the >> Identify Tool and Selection tool was on 32 bit Windows. If so, this could be >> the differentiating factor. >> >> Royce >> >> >> >> On Mar 17, 2011, at 1:31 PM, William Kyngesburye wrote: >> >> >>> Some tests here, OSX 10.6.6: >>> >>> QGIS 1.6 with Sqlite/Spatialite 3.6.23/2.4rc3 framework >>> >>> add 20 spatialite layers: 2s >>> quit: instant >>> reopen: 2s >>> >>> QGIS 1.6 with Sqlite/Spatialite 3.7.4/2.4rc4 framework >>> >>> add 20 same layers: 2s >>> quit: instant >>> reopen: 3s >>> >>> QGIS 1.7 r15455 with Sqlite/Spatialite 3.7.4/2.4rc4 framework >>> >>> add same 20 layers: 2s >>> quit: instant >>> reopen: 3s >>> >>> I'll try updating my SVN and rebuilding and see if there is a change. >>> >>> On Mar 17, 2011, at 11:04 AM, Alessandro Furieri wrote: >>> >>>> Hi Noli, hi Royce, >>>> >>>> I've just spent several hours attempting to build the >>>> current QGIS-Trunk SVN snapshot on my cheap and old >>>> second hand MacMini (incredibly slow hardware, really >>>> an extenuating time consuming process ...). >>>> >>>> Anyway, these are my personal findings: >>>> >>>> - Mac Os X 10.5 Intel >>>> - not using frameworks at all (only the Qt one) >>>> - using MacPorts libraries instead >>>> - and using INTERNAL SpatiaLite (2.4.0-RC4) >>>> >>>> + QGIS on Mac Os X runs exactly as it run on Windows >>>> + I was completely unable to observe any issue about >>>> the Identify tool >>>> + opening an 80+ layers DB takes an absolutely >>>> reasonable time >>>> + closing the same DB is a quite immediate process >>>> >>>> So, I'm completely unable to tell you why the 'standard' >>>> QGIS distribution for Mac Os X shows so many problems >>>> related to SpatiaLite 2.4.0-RC4 as you've reported. >>>> >>>> At this point I strongly suspect that something is >>>> broken or misconfigured in the most recent SpatiaLite >>>> Mac Os X framework, because simply avoiding to use >>>> this one and building so to use the INTERNAL spatialite >>>> instead fixes any issue. >>>> >>>> bye Sandro > > ----- > William Kyngesburye <kyngchaos*at*kyngchaos*dot*com> > http://www.kyngchaos.com/ > > [Trillian] What are you supposed to do WITH a maniacally depressed robot? > > [Marvin] You think you have problems? What are you supposed to do if you > ARE a maniacally depressed robot? No, don't try and answer, I'm 50,000 times > more intelligent than you and even I don't know the answer... > > - HitchHiker's Guide to the Galaxy > > _______________________________________________ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
