Using WebKit, I've got really good page element monitoring through use of the WebFrameLoadDelegate and WebResourceLoadDelegate protocols. This takes care of images, script and CSS files very nicely. But we're finding that ads loading with JavaScript are often a significant part of our page load times, and I'm trying to get some visibility into what's going on. We suspect that Google Analytics code can occasionally take longer than usual, too. Specifically, I'm hoping to be able to monitor the execution time of any JavaScript that runs at page load time and therefore adds to the total page load experience.
Does anyone have any suggestions for tacks I could take to solve this? One thought would be to add some sort of delegate protocol for JavaScript that will let me monitor what's going on. A more brute- force method might be to custom compile JavaScriptCore to emit the data I need some way.
Any suggestions, thoughts, or warnings would be welcome. Chuck
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