Re: Xcode-users Digest, Vol 2, Issue 395
Re: Xcode-users Digest, Vol 2, Issue 395
- Subject: Re: Xcode-users Digest, Vol 2, Issue 395
- From: Gordon Apple <email@hidden>
- Date: Mon, 01 Aug 2005 15:30:07 -0500
> I don't think the main performance problem is due to "not being
> integrated". Sure, there are a couple of messages which needs to be
> passed across processes, but I'm experiencing certain performance
> issues which are in the range from 10 to 500 times slower than a
> comparable application.
>
> After investigating this problem using Shark (which is a great
> tool!), I suspect it is AppKit and especially NSTextView,
> NSLayoutManager and possibly some additional suboptimal
> implementation techniques (bugs?) which may cause this problem.
> I experienced the same issues in other applications that use AppKit
> and NSTextView - e.g. TextEdit.
>
> (On the otherhand, MLTE isn't great either, but much faster than
> NSTextView, but still 20 to 50 times slower than handcrafted editors).
Does Safari use AppKit? I am continually amazed how it can take several
seconds to just scroll back to where I just left. Or how about a 1 to 10
minute beach ball triggered by a simple op such as mousing over the close
button of a window. I wonder if some of these delays are not specific to
XCode, but something more pandemic.
--
Gordon Apple
Ed4U
Redondo Beach, CA and Little Rock, AR
email@hidden
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