[GitHub] [buildstream] abderrahim commented on issue #1541: 1.6.3 performance question

[GitBox <gi...@apache.org>]

abderrahim commented on issue #1541:
URL: https://github.com/apache/buildstream/issues/1541#issuecomment-987105651


   bst master uses the same order. I believe this was discussed in an issue before and doing the "right thing" would make the bst overhead bigger which the people doing the work thought would hurt performance rather than help.
   
   The issue is that when an element is not found in the artifact cache, it's added to the source queue and its build dependencies are added to the artifact queue. Then jobs are taken from the queues in a fixed order regardless of how "urgent" they are (add to that that the artifact and source queues both compete for fetcher resources)


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