Antialiasing make plot very very slow for big tables

[Everthon Valadão]

Binary package hint: qtiplot

What I expected to happen: A quick plotting of my data.

What happened instead: Everytime I try to plot some big table (i.e. 100K+ rows), qtiplot freezes for several minutes. And worse: if I edit something, the re-plot takes the same unnecessary amount of time. Sincerely, this almost makes me give up of qtiplot, but today I accidentally discovered that this precious plot time could be drastically reduced by disabling "antialiasing" in the menu Format>Plot. This turns the "lots of freezed minutes" in "some few (non-freezed) seconds"!

So, concluding, I highly recommend that the antialiasing be DISABLED by default, so other people do not pass the same trouble I've been experiencing for months...

BTW, my system configs are:

$ uname -a
Linux valadao-desktop 2.6.28-13-generic #44-Ubuntu SMP Tue Jun 2 07:57:31 UTC 2009 i686 GNU/Linux

$ cat /etc/issue
Ubuntu 9.04

$ apt-cache policy qtiplot
nautilus:
  Installed: 0.9.7-1
  Candidate: 0.9.7-1

[Lord Panta (panta2mi)]

i have the same error, i have several graphics with 40k column data, for x and y.... when i zoom any part of graphic, qtiplot is very slow.... and i need wait for several minutes to save and close quickly....

when i save and some graphic have zoom, qtiplot is very... very... very... slow to open session,...

ProblemType: Bug
Architecture: i386
Date: sun Jan 3 20:12:00 2010
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/qtiplot
Package: qtiplot 0.9.7-1ubuntu1
ProcVersionSignature: Ubuntu 2.6.31-16.53-generic
SourcePackage: qtiplot
Uname: Linux 2.6.31-16-generic i686