Unusually poor performance in current release version about checktestdata HOT 4 OPEN

@austrin can you provide the specific script and test data that went from ~5 minutes to > 3 hours? That would be helpful in debugging.

from checktestdata.

OK, here it is: https://gist.github.com/austrin/981690606d9f695d9efb591617b634ac

from checktestdata.

Ok, I've fixed one issue causing performance degradation since 2018-04-22, but I don't see performance degradation for ascendingphoto. Here's my runtimes for the whole data sets of these problems from NWERC 2018: https://gist.github.com/eldering/5dd61a4f46abc451292dc97725f3ce40
Note the checktestdata without suffix is the current versoin and that I don't have the last two since checktestdata crashes on the large test cases of jugglingtroupe, but that's not a regression.
I'm running this on an Intel CPU G3258 @ 3.20GHz, compiled with gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516.

from checktestdata.

Sidenote: That crash is a nice reminder why RE2 is a good regex implementation.

from checktestdata.