RE: Q on performance with 10000 faces

[Drew Adams]

    You could try to see whether anything in the code you load in your
    .emacs calls one of the text property search functions in a loop
    (10000 times in your case).  For instance

    \(next\|previous\)-\(char-\)?property-change.

    If this happens from a hook or timer, it definitely could give
    you trouble,

    You could grep the code loaded by your .emacs for these and related
    text property search functions.

    I can definitely see why things might get slow for you if you would
    make parts of your buffer invisible (would probably make line-move
    slow) or when you would try to copy a large part of your buffer by
    yanking (remove-yank-excluded-properties would be doing a lot of work).

Thanks, Luc. I'll take a look when I get some time. I don't make any text
invisible, and I don't yank text by program. I will look for property-change
searches.