A few years back I reported a substantial performance issue with the Python-Textile package. I'll defend my choice of phrasing, "incredibly abysmal performance", with a dictionary.
Incredibly: to a great degree; extremely.
Abysmal: extremely bad; appalling. Very bad, dreadful, awful, terrible, frightful, atrocious, woeful, hopeless, lamentable, laughable, substandard, poor, inadequate, inferior, unsatisfactory; informal rotten, appalling, crummy, lousy, shocking, dire, the pits; British informal duff, a load of pants, pants.
I'm thinking a less offensive (though, my gods, being offended at a bug report with test case and measurable performance deficit…) way to phrase it would have been: "Performance is extremely pants." Of course, few would grok that, either.
Now, the maintainer two years ago mentioned he had a work-in-progress "cleanup" of the codebase. Two years ought to have been enough time to get that pushed out, so I've re-benchmar