A few wild guesses (not based on code knowledge, just speculation):
* If the repository on the slave is being wiped each time you build, it
might save time to skip the wipe and only clean instead of wiping
* If the repository on the slave has not had "git gc" run recently and
it has been there a long time with many commits, it might save time to run "git
gc" in the slave repository
* If the repository on github is large, it might save time to clone to
a known location on the slave then use the "reference repo" argument to
reference the existing local copies rather than copying from github each time
Mark Waite
>________________________________
> From: Andrew Coulton <and...@ingenerator.com>
>To: jenkinsci-users@googlegroups.com
>Sent: Thursday, May 30, 2013 4:04 PM
>Subject: Can I reduce delay at start of build?
>
>
>
>Hi there,
>
>
>I have a Jenkins server (v1.5.10) set up to run builds on remote slaves. My
>build is starting to get bigger, and I'm trying to shave time off it to reduce
>the feedback loop.
>
>
>I've noticed that every build seems to have a delay of about 40 seconds at the
>beginning before it starts to checkout from git, as below:
>
>
>00:00:00.000 Github pull request #69 of commit
>6e9920cd8d49af9da20d5f9f18e4f3b33c3971f0 automatically merged. 00:00:00.508
>Building remotely on ####### (i-145b3f5e) in workspace
>/var/jenkins/workspace/###### 00:00:01.314 Checkout:##### /
>/var/jenkins/workspace/##### - hudson.remoting.Channel@af1257:#### dev-server
>build slave (i-145b3f5e) 00:00:01.314 Using strategy: Default 00:00:01.451
>Last Built Revision: Revision 4256bc9e6338f975905ba09d3f47c407046e8215
>(origin/pr/69/merge)
>00:00:40.098 Fetching changes from 1 remote Git repository 00:00:40.114
>Fetching upstream changes from g...@github.com:#####
>00:00:46.039 Commencing build of Revision
>a7cc4e94e1a1a07b47542abf3273e30bc17150c8 (origin/pr/69/merge)
>00:00:47.851 Merging Revision a7cc4e94e1a1a07b47542abf3273e30bc17150c8
>(origin/pr/69/merge) onto master
>
>
>Does anyone know what's happening during that time and if there's anything I
>can do to reduce the lag? I've had a look at various logs, and done some
>googling, but haven't been able to come up with any ideas.
>
>
>
>Thanks,
>
>
>Andrew
>
>
>
>
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