[Tcl-bugs] [ tktoolkit-Bugs-1692395 ] Poor listbox performance in Tk 8.5a6

[SourceForge.net <no...@so...>]

Bugs item #1692395, was opened at 2007-04-01 18:17
Message generated for change (Tracker Item Submitted) made by Item Submitter
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=112997&aid=1692395&group_id=12997

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: 09. [listbox]
Group: development: 8.5a6
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Csaba Nemethi (nemethi)
Assigned to: Allen Flick (caflick)
Summary: Poor listbox performance in Tk 8.5a6

Initial Comment:
The following simple script demonstrates a siginificant listbox performance regression in Tk 8.5a6:

pack [listbox .lb]
puts [time {
    for {set n 0} {$n < 100000} {incr n} {
        .lb insert end "This is item #$n"
    }
}]

On my rather slow Linux box (running SuSE Linux 10.0), this script produces the output

1793963 microseconds per iteration

Compare this with the time needed by Tk 8.4.13:

1126718 microseconds per iteration

This is an unacceptable performance regression.

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=112997&aid=1692395&group_id=12997