I wrote:
> Anyway, it looks like we should write off these longfin timings as
> ambient noise :-(
Here's a possibly more useful graph of regression test timings over
the last year. I pulled this from the buildfarm database: it is the
reported runtime for the "installcheck-C" step in each successful
build of HEAD on dromedary, going back to Jan. 2017. I picked dromedary
because I know that that machine hasn't gotten any software updates
nor is there anything else very interesting going on on it. I dropped
three or four obvious outlier reports (possibly those ran during the
machine's nightly backup cron job). The reported runtime is only
precise to 1s, and a couple seconds jitter is hardly surprising, so
there's a good deal of noise. Still, it's possible to discern when
I put some effort into test runtime reduction back in April, and
it can be seen that things have gotten notably slower since the
beginning of November.
regards, tom lane
