766600 - Prioritize first page load over other startup operations

Status: RESOLVED INCOMPLETE

(Firefox for Android Graveyard :: General, defect)

Description

[Wesley Johnston (:wesj)]

On my crappy DroidX, BrowserApp.startup takes around 500ms. A lot of what is in there needs to be done at startup, but isn't crucial to using the browser. I think we could delay a lot of it till after first page load.

I'll try to get some better numbers for each individual item in startup. Eventually, stechz's startup timeline might be interesting, but we can start with some simpler things.

Comment 1

[Wesley Johnston (:wesj)]

Grr. Somehow numbers got slightly better between then and now, but I'm still seeing around 350ms time here. Most of that is in creating the Tab object. I'm need to look into what's slow there and see if we can create a simplified constructor in that case without breaking all the listeners that expect to get events in a certain order.

First run is much worse because we force creating the Form History and passwords database. That can also be move to delayed startup.

Comment 2

[Mark Finkle (:mfinkle) (use needinfo?)]

(In reply to Wesley Johnston (:wesj) from comment #1)
> Grr. Somehow numbers got slightly better between then and now, but I'm still
> seeing around 350ms time here. Most of that is in creating the Tab object.

Probably adding the <browser> object to the DOM

> First run is much worse because we force creating the Form History and
> passwords database. That can also be move to delayed startup.

Yeah we should mimic what we did in XUL Fennec for the post-page-delay

Comment 3

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