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[RFC, experimental] save_{excursion,restriction}

From: Dmitry Antipov
Subject: [RFC, experimental] save_{excursion,restriction}
Date: Mon, 23 Jul 2012 21:07:02 +0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120713 Thunderbird/14.0

It's worth trying to redesign save-restriction and save-excursion to avoid
allocating Lisp data. I tried some hacks for save-excursion, and it's quite
surprising: initially, running (while t (scroll-up) (sit-for 0.05)) over
just loaded xdisp.c with font-lock enabled asks for 600 GCs, and with this
patch it's just 350.


Attachment: excursion.patch
Description: Text document

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