92224 2012-07-25 00:29:29 -0700 [PerfTest] Add performance tests for preload scanning 2013-03-05 09:40:49 -0800 1 1 1 Unclassified WebKit DOM 528+ (Nightly build) Unspecified Unspecified RESOLVED WONTFIX P2 Normal --- 77037 90751 1 skyul webkit-unassigned abarth eric nduca rniwa simonjam tonyg zoltan oldest_to_newest 677736 0 skyul 2012-07-25 00:29:29 -0700 We need performance tests for preload scanning to improve PreloadScanner. 677741 1 skyul 2012-07-25 00:37:03 -0700 There was an attempt to improve the performance of preload scanner by running the scanner off-the-main thread. See Bug 63531. It seems people used html5-parser benchmark. But I think html5-parser is not suitable to measure the performance of preload scanning because this benchmark is intended to measure the parser throughput. 680111 2 skyul 2012-07-26 22:01:11 -0700 Is it possible to delay the loading of elements in perf tests? For example, I'd like to delay dummy.js loading for 1 second to give enough time for the preload scanner to scan the rest of input stream and request preloads. <script src="dummy.js"></script>... It seems web-page-replay used for replay performance tests performs a similar function though the delay is recorded, not manually specified. 847465 3 eric 2013-03-05 02:05:55 -0800 I'm not sure how we'd do this? 847753 4 abarth 2013-03-05 09:40:49 -0800 IMHO, we should just use the PLT to measure this sort of thing. That's really the end-to-end metric that we'd like to move with the preload scanner.