47767 - JavaScript image rollovers noticeably slower in Moz/N6

Status: VERIFIED DUPLICATE of bug 20110

(Core :: DOM: Core & HTML, defect, P3)

Description

[ekrock's old account (dead)]

Using Commercial 2000080404 on WinNT 4.0 SP4.

To repro:
1) open page
2) let your mouse glide over the six rollover GIFs near the top of the page
(Home,What's New, etc.)

Expected: as on Nav4, when you move from one GIF to the next, the GIF that you
just left (mouseouted from) should redisplay the mouseout version almost immediately

Actual: on N6, there's a noticeable delay (up to 1 second) and a white box
larger than the GIF area itself is visible during this time

If you don't see this immediately, roll over all the GIFs back and forth. It's
most noticeable on the "Reviews, Stars, and News" GIF, perhaps because it's
larger than the others.

Comment 1

[ekrock's old account (dead)]

Marking perf & nominating for nsbeta3 consideration as image rollovers are
widely used on the web.

Comment 2

[R.K.Aa.]

this looks like a another duplicate of bug 20110

Comment 3

[Jeffrey Baker]

Yeah it's a dupe.  Using tcpdump shows that images are being If-Modified-Since'd
on every rollover.  ekrock do us a favor and nominate Bug 20110 for nsbeta3.

*** This bug has been marked as a duplicate of 20110 ***

Comment 4

[Prashant Desale]

Verified Duplicate.