Hi, I have switched perf.haskell.org to run nofib with $ make -C nofib EXTRA_RUNTEST_OPTS=-cachegrind NoFibRuns=1 mode=slow -j8 Right now, a complete build with testsuite and nofib takes ~2½h, but that was before I added the "-j8" to the line above, so let’s see if that helps. Even with cachegrind, most nofib tests finish in under one minute, 7 take between one and 10 minutes, k-nucleotide needs 20 minutes and fannkuch-redux needs 27 minutes. All in all not too bad. I reset the perf.haskell.org database and started re-measuring commits from 055d73c6576bed2affaf96ef6a6b89aeb2cd2e9f on. It will take a while (a week maybe?) for it to catch up with master. I hope that this allows us to spot performance regressions with greater precision. Greetings, Joachim -- Joachim “nomeata” Breitner mail@joachim-breitner.de https://www.joachim-breitner.de/