482925 - [HTML5] Tweak HTML5 tree builder flushes for better perceived responsiveness

Status: NEW

(Core :: DOM: HTML Parser, defect, P4)

Description

[Henri Sivonen (:hsivonen)]

Should tweak HTML5 tree builder flush timing so that the perceived responsiveness is better.

Comment 1

[Henri Sivonen (:hsivonen)]

There are two issues:
 1) Tuning how tree ops are flushed when not speculating (TODO fallout from bug 502568).
 2) Making tree op flushes that don't need to run to completion synchronously (i.e. non-document.write/close flushes) regulate the maximum number of tree ops in one flush and scheduling a continuation flush if the initial queue is too long.

Comment 2

[Henri Sivonen (:hsivonen)]

Note to self: Don't defer flushing before </head> has been flushed.

Comment 3

[Henri Sivonen (:hsivonen)]

Not Firefox 4 material.

Comment 4

[Henri Sivonen (:hsivonen)]

Less important in the multi-process world. Doing anything informed here would need a good benchmarking setup.