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Serious performance regression when using GHC 8.2.1 + Text.RE.TDFA + Data.Text.Lazy #156
This appears to be a GHC bug, not a bug in the regex packages themselves, but reporting here also in case anyone else runs into this issue. I reported against GHC here.
In GHC 8.2.1, I observe apparently exponential time in the length of
For the problematic combination, the run times are 3s, 10s, 22s, and 40s