Web Inspector: profile timeline panel, fix obvious problems.

• Component: Web Inspector (Deprecated)
• Status: RESOLVED FIXED

[Pavel Feldman]

Start timeline for cnn.com load. Stop it in 30 seconds. Moving / resizing window is slow.

[Pavel Feldman]

Created attachment 43096 [details]
[PATCH] fixes.

There are few lines removed in AbstractTimelinePanel. I don't understand why they were there. Any clues?

[Joseph Pecoraro]

> +    var index = this.className.indexOf(className);
> +    if (index === -1)
> +        return false;
> +    var toTest = " " + this.className + " ";
> +    return toTest.indexOf(" " + className + " ", index) !== -1;

Why the changes to hasStyleClass? I assume that using indexOf is faster then checking a regular expression. If that is the case then this looks like a good idea. In your experience is the string concatenation that expensive that its worth the early check?

[Pavel Feldman]

(In reply to comment #2)
> > +    var index = this.className.indexOf(className);
> > +    if (index === -1)
> > +        return false;
> > +    var toTest = " " + this.className + " ";
> > +    return toTest.indexOf(" " + className + " ", index) !== -1;
> 
> Why the changes to hasStyleClass? I assume that using indexOf is faster then
> checking a regular expression. If that is the case then this looks like a good
> idea. In your experience is the string concatenation that expensive that its
> worth the early check?

As I understand it creates two more objects in VM heap. Given that GC is not (yet?) generational, it'll make subsequent gc more expensive.

[Pavel Feldman]

Created attachment 43102 [details]
[PATCH] Updating removeStyleClass as well.

[Pavel Feldman]

Committing to http://svn.webkit.org/repository/webkit/trunk ...
	M	WebCore/ChangeLog
	M	WebCore/inspector/front-end/AbstractTimelinePanel.js
	M	WebCore/inspector/front-end/TimelinePanel.js
	M	WebCore/inspector/front-end/utilities.js
Committed r50909