356701 - Rewrite IsAttributeMapped on some SVG elements to use a hash set

Status: NEW

(Core :: SVG, defect)

Description

[Jonathan Watt [:jwatt]]

Many SVG elements have a considerable number of mapped attributes. In these cases it would be far more efficient to use a hash set instead of pointer comparison. I have some code worked out for this already.

Comment 1

[Jonathan Watt [:jwatt]]

Attachment: snapshot (untested)

This is roughly how we'd do it I think.

Comment 2

[Jonathan Watt [:jwatt]]

On the other hand this would use more memory than our current method of finding out whether an attribute is mapped into style. It would be nice to have some numbers so we  can have a better idea of the win/cost of this approach.