550967 - SessionStore non-trivially slows down startup

Status: RESOLVED DUPLICATE of bug 810932

(Firefox :: Session Restore, defect)

Description

[Paul O'Shannessy [:zpao] (not bugmail, email directly)]

It's a known issue, and should be pretty obvious. Symptoms include a large CPU spike, saturated bandwidth, an unusable browser.

There might be things we can do to make it better. For example, meter tab loads and look at specific areas (e.g. maybe loading session history is a bottleneck).

The problem is described across a multitude of different bugs, some of which will be duped to new bugs. Other new bugs will be filed as we find areas to improve.

Comment 1

[David Teller [:Yoric] - still alive but not very active]

I'm profiling startup for unrelated reasons and it seems that a thread backs up sessionstore.js and fsyncs at the end. That is certainly a very small part of the slowdown but I am not sure it is necessary.

Comment 2

[Wayne Mery (:wsmwk)]

zpao, is this bug still wanted, given the other perf bugs you have opened since comment 0??

Comment 3

[David Teller [:Yoric] - still alive but not very active]

This bug is very much still wanted. Currently working on bug 810932 to improve the situation by splitting the file.

Comment 4

[:Gavin Sharp [email: [e-mail]]]

I don't think there's much benefit in tracking this separately.