[Bug 403731] [NEW] Antialiasing make plot very very slow for big tables

[Everthon Valadão]

Public bug reported:

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

** Affects: qtiplot (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: freeze plot slow

** Description changed:

  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, m system configs are:
+ 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

-- 
Antialiasing make plot very very slow for big tables
https://bugs.launchpad.net/bugs/403731
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