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bug#21077: 24.5; Slow printing in inferior python buffer with python-she
bug#21077: 24.5; Slow printing in inferior python buffer with python-shell-enable-font-lock
Sat, 01 Aug 2015 14:42:14 +0200
Gnus/5.130014 (Ma Gnus v0.14) Emacs/25.0.50 (berkeley-unix)
On Thu, Jul 30 2015, Stefan Monnier wrote:
> In the case of comint modes, rather than disable font-lock we should
> refrain from font-locking the text after the last \n (since that's the
> line that keeps getting expanded, so we end up re-font-locking it O(N)
> times for a line of length N, for a total amount of work of O(N^2)).
> IIRC I have a similar hack in grep.el or compile.el.
But comint-output-filter does
(font-lock-prepend-text-property prompt-start (point)
So keyword fontification seems to be inhibited anyway. Is this done in
a particularly inefficient way?
Wolfgang (who ought to go read the source)