The "Changelog" Plugin seem to be very slow with >100 changesets.
We recently installed the "TracTicketChangelogPlugin" on our system
(TRAC 1.4.2, Linux, SQLite). It is very welcome because it gives a nice
overview of all changesets related to a ticket.
However, suddenly my users complain about slow loading of tickets. Some
tickets with 50-150 changesets have loading times >30 seconds. If I
disable the TracTicketChangelogPlugin, then loading time is only 2 seconds.
I tried to shorten the message length, but this did not change the
log_message_maxlength = 50
As far as I know, the plugin is still based on Genshi. Could this be the
reason why it is so slow?
Trac Hacks #13283
Convert templates to Jinja2
Any other users of this plugin?
What are your performance experiences?
Can I limit the number of displayed changesets, maybe only 20 most
Please help, my TracTicketChangelogPlugin is still very slow. It takes over 30 seconds for some tickets. If I cannot find a solution I must disable this wonderful plugin.
For me it looks like the performance bottleneck is the SQL query
not the Genshi template processing.
I made an experiment to limit the number of change-log to 10
(instead 150). As expected I got only 10 change-logs in the
output. Unfortunately this did not change the extreme long wait
time (still >30 seconds).
The SQL query is made in function `_get_ticket_revisions` in
SELECT p.value, r.rev, r.author, r.time, r.message
FROM ticket_revision AS tr
LEFT JOIN revision AS r
ON r.repos=tr.repos AND r.rev=tr.rev
LEFT JOIN repository AS p
ON p.id=tr.repos AND p.name='name'
Note the "LIMIT 10" in the last SQL line which I inserted in my
experiment. The total wait time is not influenced by this "LIMIT
10". I am neither a database nor TRAC expert. But this SQL query
looks rather simple. I cannot imagine that this takes 30 seconds.
The `ticket_revision` table is short and has only 1000 rows on my
Some specs about my setup:
- TRAC 1.4.2
- TracTicketChangelogPlugin 1.2 (r17251 by rjollos on 2018-07-30)
- Linux with TRAC running via apache Mod-WSQI
- SQLite database
- 500 tickets
- SVN with 5000 commits
- I have a powerful server with plenty of RAM, SSD and otherwise fast TRAC
I created a ticket for this: