235511 - Investigate regression in Txul/Ts from attributes landing

Status: RESOLVED WONTFIX

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

Description

[Jonas Sicking (:sicking) No longer reading bugmail consistently]

There was a slight regression in Txul and Ts of around 1-2% when XUL was
converted to use nsAttrAndChildArray.

Part of this might be from the fact that we now more seldomly make xul-elements
heavyweight. This reduces memoryuse, but it slows down GetAttrNameAt and
GetAttrCount.

This bug is about investigating fixing that slowdown. I have a patch in the
works, but it's not quite ready yet.

Comment 1

[Eugene Savitsky]

Is this bug valid nowadays?

Comment 2

[Jonas Sicking (:sicking) No longer reading bugmail consistently]

The fixes i had in mind were done in bug 232639. I don't think there is much more we can do here short of more often making elements heavy-weight, which I don't think we want to do.

This bug can be marked either FIXED (since bug 232639 should have given some of the perf hit back) or WONTFIX since I can't think of anything more we can do here short of adding bloat.