Bug 13433
| Summary: | Page is very slow to scroll and paint | ||
|---|---|---|---|
| Product: | WebKit | Reporter: | Dave Hyatt <hyatt> |
| Component: | Layout and Rendering | Assignee: | Dave Hyatt <hyatt> |
| Status: | RESOLVED FIXED | ||
| Severity: | Normal | ||
| Priority: | P2 | ||
| Version: | 523.x (Safari 3) | ||
| Hardware: | Mac | ||
| OS: | OS X 10.4 | ||
| URL: | (see bug 13337's attachment) | ||
| Bug Depends on: | |||
| Bug Blocks: | 13351 | ||
Dave Hyatt
It scrolls smoothly if you are at the top of the page but then gets super slow as you get closer to the bottom.
| Attachments | ||
|---|---|---|
| Add attachment proposed patch, testcase, etc. |
Dave Hyatt
Every single span has a background color and they nest deeply. By the time you get to the bottommost lines you are doing thousands of fill rects per line.
This would be very difficult to optimize.
Note IE7 is extremely slow on this page as well (the exact same symptom... fast at the top, slow at the bottom).
Dave Hyatt
Fixed.