Please have a look at Bug #251122 and see if purging ~/.recently-used.xbel resolves the slowness issue. If this is the case, this bug should be marked a duplicate of Bug #251122 and subsequently closed as it has nothing to do with mousewheel scrolling.
Please have a look at Bug #251122 and see if purging ~/.recently- used.xbel resolves the slowness issue. If this is the case, this bug should be marked a duplicate of Bug #251122 and subsequently closed as it has nothing to do with mousewheel scrolling.