https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117190
--- Comment #16 from Frank Scheiner <frank.scheiner at web dot de> --- (In reply to Sam James from comment #15) > I meant identify a single file which takes longer, possibly by using > -time=/tmp/kernel to record how long each file takes on a good+bad build, > then diffing the two. That could be an interesting exercise though it can't be much per file if the whole build reproduces a difference of around 3 seconds between different GCCs with short of 8 mins for the whole build. But I'm also unsure if the timings for single files will reproduce well enough between builds. Hm, maybe with fixed processor frequency. Still, I don't expect that new results would contradict the existing results.