Re: What's the faster way to change attributes of string ?

[Yen-Ju Chen]

> From: "Yen-Ju Chen" <yjchenx@hotmail.com>
> To: discuss-gnustep@gnu.org
> Subject: Re: What's the faster way to change attributes of string ?
> Date: Wed, 06 Aug 2003 14:31:38 -0400
>
>
>
>
> > From: Alexander Malmberg <alexander@malmberg.org>
> > To: discuss-gnustep@gnu.org
> > Subject: Re: What's the faster way to change attributes of string ?
> > Date: Wed, 06 Aug 2003 19:58:13 +0200
> >
> > Yen-Ju Chen wrote:
> >
> > >   I have two choices:
> > >   1. Build a new NSAttributedString and use [NSTextStorage
> > > setAttributedString:].
> > >   2. Directly use -addAttribute:value:range: on NSTextStorage.
> > >   Is there any significant difference in speed between this two ways ?
> >
> > Unless you're changing the attributes of every single character in the
> > string, #2 should be faster, but perhaps not by much. However, for #2,
> > it's very important that you call -beginEditing before the first change
> > and -endEditing after the last change. Otherwise, #2 will be very slow.

 Well, they are equally slow when changing the color and font on every 
keyword of NSTextView.m.
 From -beginEditing to -endEditing takes only 5-8 seconds,
 after that, it takes almost 1 min to render the NSAttributedString on 
NSTextView.
 It is tested with CodeEditor CVS, with backart.
 (xlib-backend is roughly the same slow. I just didn't measure the time).

 Yen-Ju
> > - Alexander Malmberg
> >
> >
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