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bug#20352: Factor 2 slow down of font-locking in c-mode

From: Paul Eggert
Subject: bug#20352: Factor 2 slow down of font-locking in c-mode
Date: Mon, 16 May 2016 10:28:57 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.0
I just now ran Stefan's benchmark on emacs-25 (commit 9ca5dbf947a7421d37b3e2d2bc6b8d2c9218bc65) and on my platform (Fedora 23 x86-64) Emacs 25 is now a bit faster than Emacs 24.5, as the benchmark took about 29 s on Emacs 24.5 and about 27 s on Emacs 25. I used the Emacs 25 src/xdisp.c in both benchmarks.
Alan, I guess you fixed the performance problem at some point (thanks!). As it's listed as a bug blocking Emacs 25, I'm closing the bug report now.
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