On en.wiki, using a 7-day search
- add the following to the default filters: "Very likely good faith" + "Likely have problems."
- Result: one time, after about 2.5 minutes, found some two-dozen results. Other times, the search never did finish.
Despite being sometimes rare, this is a perfectly valid search. In fact, looking for problems made by good faith editors is exactly what we hoped users of the New Filters beta would do.
The issue here would seem to be that this is a fairly rare event on en.wiki: I found only 23 in 7 days. And, of course, other wikis are not as big as en.wiki. On pl, cs and he, this search works fine and gets lots of results. On ru.wiki, it's slow but searching back 7 days takes about a minute. en.wiki is by far the worst, with the search taking many minutes, often finding nothing, and, one time I tried it, failing altogether ([WZ4J2wpAAEMAAEW2y20AAACK] 2017-08-23 23:04:55: Fatal exception of type "Wikimedia\Rdbms\DBQueryError" )
(There are other searches that take a long time. E.g., "very likely good" + :Very likely bad faith." But that one is arguably invalid and could just be short circuited. See T164292 )
What can we do to make such searches —and this one in particular—faster?
(See related task T164621 )