Mark Moll <mmoll(a)cs.cmu.edu&gt; writes: I agree with John, this wouldn't win us that much speed. The speed difference between pine/gnus is because of the very different design decisions. Probably not, the imap parser isn't the bottleneck so replacing that wouldn't improve much. The main bottleneck in nnimap/gnus right now is imho that it takes a long time to check for new mail. No other imap clients I've tested does this at all, so perhaps we can make that part optional. (It can also be made faster by using a different strategy). The major bottleneck would then be that it takes a long time to enter a folder, this is impossible to fix without heavy modifications of Gnus, and for me this isn't a major problem anyway (entering a folder with ~1200 articles takes ~25 seconds with 9s spent in nnimap for me. I can live with that). Do you agree with my observations of where the bottlenecks are? Which things in nnimap are slow for you?