512799 - Fastload entire XUL window

Status: NEW

(Core :: XUL, defect, P3)

Description

[Dietrich Ayala (:dietrich)]

Vlad suggested that a better way than piecemeal fastloading bits like XBL and CSS, we could instead fastload the entire XUL window state.

Comment 1

[Dietrich Ayala (:dietrich)]

See also bug 94199 (XBL fastload) and bug 196843 (CSS fastload).

Comment 2

[Dietrich Ayala (:dietrich)]

Per the startup conversation yesterday, I measured the effect fastload on cold vs warm startup. This is on a MBP 2.5ghz/4gb/7200rpm.

warm startup: 200ms slower with fastload disabled 
cold startup: no detectable difference

Comment 3

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Note that if we do this, it would be nice to also consider how we can use this in a more general way -- specifically, offline app fastload.  Think saving zimbra state before onload or whatever, or even just general serialization of content and layout state that we can use for session store.

Comment 4

[Dietrich Ayala (:dietrich)]

same scenario as comment #2, w/ numbers for context:

warm startup, fastload enabled: ~770ms
warm startup, fastload disabled: ~920ms
cold startup, fastload enabled: 12000ms-13000ms
cold startup, fastload disabled: 12000ms-15000ms

Comment 6

[Sylvestre Ledru [:Sylvestre]]

Moving to p3 because no activity for at least 1 year(s).
See https://github.com/mozilla/bug-handling/blob/master/policy/triage-bugzilla.md#how-do-you-triage for more information