Re: NSPopUpButton addItemsWithTitles is way slow
Re: NSPopUpButton addItemsWithTitles is way slow
- Subject: Re: NSPopUpButton addItemsWithTitles is way slow
- From: Jeremy Dronfield <email@hidden>
- Date: Sat, 17 Aug 2002 15:24:34 +0100
On Saturday, August 17, 2002, at 12:54 pm, Jeremy Dronfield wrote:
On Saturday, August 17, 2002, at 05:18 am, Matt Neuburg wrote:
Still, I don't agree about the speed. I just tried this:
int i;
[popup1 removeAllItems];
for (i=0; i<300; i++) {
[popup1 addItemWithTitle: [NSString stringWithFormat: @"%i", i]];
}
and it certainly didn't take "several seconds" to complete. Perhaps
there's
something else at play here.
Here's an uninformed guess: your strings are, at most, three characters
long. If you replaced them with "Guatemala", "United States", "People's
Democratic Republic of West Jibrovia" or whatever, wouldn't the speed
of the string compares be affected?
Just proved myself wrong. I went back to a piece of code I wrote a while
ago, for putting fonts in a popup menu. It goes like this:
int fontsCount;
NSFontManager *fontManager = [NSFontManager sharedFontManager];
NSArray *fontsArray = [[NSArray alloc] initWithArray:[fontManager
availableFontFamilies]];
NSArray *sortedFontsArray = [fontsArray
sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
for (fontsCount = 0; fontsCount < [sortedFontsArray count];
fontsCount++) {
[fontMenuPopUp addItemWithTitle:[sortedFontsArray
objectAtIndex:fontsCount]];
}
Here, the array of font families (141 items, which surprised me - I take
back my righteous guff about Apple guidelines) goes through the mill
twice: once when it's sorted into alphabetical order, and again when
it's added to the menu. I timed the process: 0.24 seconds. There IS
something else at play in Dave's program. (NB I also tried dumping the
array en bloc into the menu, using -addItemsWithTitles: and that was
even quicker: 0.066 seconds.)
-Jeremy
=======================================
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