I have read the discussion on the performance of different permalinks on the wp hackers mailinglist, THIS forum and around Google.
I could however not really deduce if the permalink structure I have been using for the past years is good or not:
This combination put the postname directly after the / and the year,month,day combination makes it more unique since many postnames carry the same name. The html addition is something I have been using for the past 10 years on my blog (even pre wordpress) so that is legacy.
I dont know if this is good for permance or bad for performance, how can i check this?
(I have been running the blog for +10 years and there are about 10.000 posts with many links in)