1943291 - Setting up the datetimebox is rather slow.

Status: NEW

(Core :: DOM: Forms, defect)

Description

[Emilio Cobos Álvarez (:emilio)]

https://share.firefox.dev/4jtK2er, from one of the test-cases in the blocked bug.

It seems:

• We generate a lot of garbage, causing tons of cc/gc activity.
• In generateContent, we call parseFromString for every input. Ideally we should be able to share it. Just generateContent is ~25% of the time spent, and that's without accounting for garbage and such that needs to be cleaned up.
• There seems to be a lot of other low-hanging fruit but just fixing generateContent would go a long way.