(Coincidentally, looking for a modern alternative to Teleport, particularly on Mac, is a surprisingly fruitless endeavour—at least if one has grown to limit themselves to open-source software. Meanwhile I expect at least two of the sites I sometimes use to go belly-up soonish.)
As for Webalizer itself: one of my first jobs was to make a log analyzer in Perl, and since I knew almost nothing about performant file access, string splitting and data crunching, the resulting code ran fairly slowly. So iirc I soon found Webalizer as the replacement, since it was written in C and by more competent people. Or perhaps I chose AWStats, can't remember.
(Come to think of it, the Perl thing might run okayish by now, since it was a stock Perl loop over the lines with a regular expression—bad but not fatal. Now I'll have to find the cd with the encrypted archives and figure out what was wrong with the code, dammit.)