Re: Slow operations on buffers of tens of megabytes

[Richard Stallman]

    Scoring of the messages closer to the beginning of the buffer is fast,
    but as we move to higher-numbered messages, that are closer to the end
    of such big files/buffers, gnus will only score 2-3 messages per
    minute, and that's what kills performance.

Does Gnus make lots of overlays?  If so, maybe it needs to call
overlay-recenter from time to time.  Could someone please try that
and see if it makes things fast?