559327 - [HTML5] HTML5 parser seems to alloc and dealloc a lot

Status: NEW

(Core :: DOM: HTML Parser, defect, P5)

Description

[Olli Pettay [:smaug][[e-mail]]]

Could we perhaps recycle some of the memory
nsHTML5TreeBuilder::startTokenization and nsHTML5Tokenizer::start()
reserve?

Memory allocation and deallocation shows up pretty high in the Shark profiles.

(Note, in my simple .innerHTML tests html5 parser is already faster than the old parser)

Comment 1

[Henri Sivonen (:hsivonen)]

Is the parser startup the main allocation problem? I would have guessed nsHtml5StackNode and nsString.

Comment 2

[Olli Pettay [:smaug][[e-mail]]]

I could re-profile, but in my testcase (setting innerHTML to some simple string value) it was really those two methods mentioned in comment 0 which were causing most of the (de)allocation.

Comment 3

[Jens Stutte [:jstutte]]

Bulk-downgrade of unassigned, untouched DOM/Storage bug's priority.

If you have reason to believe, this is wrong, please write a comment and ni :jstutte.