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Re: Slow application startup when using a theme


From: Fred Kiefer
Subject: Re: Slow application startup when using a theme
Date: Mon, 09 Jan 2012 14:17:28 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:9.0) Gecko/20111220 Thunderbird/9.0

On 09.01.2012 00:58, Philippe Roussel wrote:
Hi,

I just noticed that applications start a lot slower when using a non
default theme like Neos.

To test this I added a NSLog as the first line of the AppController
-init method and this is what I get (with a hacky method).

With GNUstep theme :

philou@woody:~/sources/SimpleAgenda$ date +%X.%N&&  
./SimpleAgenda.app/SimpleAgenda
22:56:17.054406845
2012-01-08 22:56:17.826 SimpleAgenda[14542] AppController -init

With Neos theme :

philou@woody:~/sources/SimpleAgenda$ date +%X.%N&&  
./SimpleAgenda.app/SimpleAgenda
23:01:01.740665917
2012-01-08 23:01:05.015 SimpleAgenda[14643] AppController -init

This is almost 3 seconds slower and easily reproducible :(

When I apply the following patch, application startup is under 0.5
second, no matter what theme I choose.

--- Source/NSImage.m    (révision 34462)
+++ Source/NSImage.m    (copie de travail)
@@ -1812,6 +1812,7 @@

  + (NSArray *) imageFileTypes
  {
+  return [NSArray arrayWithObjects:@"tif", @"tiff", @"png", @"gif",
@"jpeg", @"jpg", nil];
    return iterate_reps_for_types([NSImageRep registeredImageRepClasses],
                                  @selector(imageFileTypes));
  }

Hard coding the file types isn't an option her, what we could do is cache the file types in the four relevant methods and make sure we clear up the cache each time a new NSImageRep subclass gets added or removed. I will try to implement that and you should then measure the time difference.

Fred






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