837246 - Email goes unresponsive for 5-10s+ when loading message body (while syncing?)

Status: RESOLVED WORKSFORME

(Firefox OS Graveyard :: Gaia::E-Mail, defect)

Description

[Chris Jones [:cjones] inactive; ni?/f?/r? if you need me]

STR
 (1) Go to email folder
 (2) Tap message body

I sometimes see lags of 5-10s with no UI response at all, and the UI becoming unresponsive (can't tap anything else).

I'm not sure but this may have mostly happened when I was syncing email.

Comment 1

[Andrew Sutherland [:asuth] (he/him)]

What domain/protocol is the account in question using? (a la https://wiki.mozilla.org/Gaia/Email/RequiredBugInfo)  What's the message turnover in the folder in question?  ActiveSync takes much bigger bites, and if we're talking 100 new message each sync...

Profiler runs from such a time interval would probably be interesting to help spot the long pole.

Loading a body doesn't acquire a folder mtuex.  If the body 'block' is cached, the back-end returns immediately.  Otherwise an IndexedDB read will be triggered which could potentially get rather backlogged.  The fact that the UI itself is entirely unresponsive suggests the back-end may be very busy processing things.

Comment 2

[Alex Keybl [:akeybl]]

We can't block on more minor user frustrations that happen intermittently. Tracking instead.

Comment 3

[Chris Jones [:cjones] inactive; ni?/f?/r? if you need me]

This was in a gmail account with very high turnover, 500-1000 msgs/day.

Using multiple workers would be the right approach here.

Comment 4

[James Lal [:lightsofapollo]]

This has changed in major ways (should never be unresponsive) - resolving as WFM for now.