[JIRA] (JENKINS-60948) Branch indexing is ~5x -> 20x slower in v0.4.1 vs v0.3.3

[luca.milane...@gmail.com (JIRA)]

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Luca Domenico Milanesio commented on JENKINS-60948   Re: Branch indexing is ~5x -> 20x slower in v0.4.1 vs v0.3.3 Johannes Carlsson thanks for reporting the issue. In a nutshell, the changes with 0.4.1 were composed of: Fetch of individual refs instead of refs/changes/* Use of the Checks API to filter out the changes that do not need validation With the combination of 1. and 2. the branch reindexing time would be a lot faster in 0.4.1 compared to 0.3.3. However, in your case, you do not have 2. because you are not using the Checks plugin. Also, by looking at your Gerrit httpd_log, it looks like the repository doesn't have a lot of refs and thus you do not see a benefit but, instead, a performance regression. When the repository has lots of refs (hundreds of thousands), fetching refs/changes/* (what the v0.3.3 was doing) may take tens of minutes and, in extreme cases, also up to 1h. That is why I changed the approach and did the fetch of the individual refs, which is slower in your case. Let me see if I can "convince" Jenkins that the subsequent "fetch" isn't needed  and thus cut the tail of git-upload-pack after the query changes API. Add Comment   This message was sent by Atlassian Jira (v7.13.6#713006-sha1:cc4451f) -- You received this message because you are subscribed to the Google Groups "Jenkins Issues" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-issues+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-issues/JIRA.204350.1580725502000.10676.1580726160190%40Atlassian.JIRA.