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Re: [RFC PATCH] Per-window face support

From: Stefan Monnier
Subject: Re: [RFC PATCH] Per-window face support
Date: Mon, 18 Jun 2018 21:21:42 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

> I fear this would lead to a big slowdown in assq, memq, and many other
> inner loops that now check EQ.  Replacing that with EQL, even if it is
> open-coded, would require testing the type first.

I doubt it'd be "big", but yes, it probably slows things down a bit.
I'm using such a patch and haven't noticed any slowdown, but I admit
I haven't bothered to try and measure it.


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