Thread:User talk:Werdna/AbuseFilter questions

Hello. I've got two questions I couldn't find the answers to. Thanks and regards.
 * 1) Is there a log about abusefilter imports where it is possible to find out when and where the filter was imported from?
 * 2) If its possible to have one filter which does the same thing as two filters do, which is preferable computationally and for speed?