evolution-calendar-factory slows down session startup

[Jean-Baptiste Lallement]

On a default Bionic Desktop installation, evolution-calendar-factory starts early and slows down session startup. In the bootchart attached, it overlaps with gnome-shell startup which is also resource intensive.
With evolution-calendar-factory delayed gnome-shell starts 2 seconds faster.

evolution-calendar-factory startup should be delayed if it cannot be disabled completely.

The following changes to evolution-calendar-factory.service do this:
"""
[Unit]
Description=Evolution calendar service

[Service]
Type=dbus
BusName=org.gnome.evolution.dataserver.Calendar7
ExecStartPre=/bin/sleep 60
ExecStart=/usr/lib/evolution/evolution-calendar-factory
"""

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: evolution-data-server 3.28.0-1ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
Uname: Linux 4.15.0-10-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Mar 16 17:52:45 2018
InstallationDate: Installed on 2013-09-03 (1654 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130902)
ProcEnviron:
 TERM=screen-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: evolution-data-server
UpgradeStatus: Upgraded to bionic on 2018-01-26 (49 days ago)

[Jean-Baptiste Lallement (jibel)]

bootchart with ev-cal-factory delayed by 1 minute.

[Jeremy Bícha (jbicha)]

Could you please propose this upstream (with a patch if you can) ?

https://bugzilla.gnome.org/enter_bug.cgi?product=evolution-data-server

[Iain Lane (laney)]

We just discussed this on IRC - I'm not happy with the proposed solution of inserting a delay into the startup file like this. It'll make timeouts and it's not really acceptable to have calendar events broken for 60 seconds in my opinion.

I think we should talk with upstream, but a better solution might be gnome-shell not activating evolution-calendar-factory until later in its startup, or not activating it at all and finding a clever place in the session to activate it.