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From: | Dmitry Gutov |
Subject: | bug#56682: locked narrowing |
Date: | Tue, 29 Nov 2022 21:29:59 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2 |
On 29/11/2022 20:19, Eli Zaretskii wrote:
Date: Tue, 29 Nov 2022 19:56:30 +0200 Cc:56682@debbugs.gnu.org, Eli Zaretskii<eliz@gnu.org>, Stefan Monnier<monnier@iro.umontreal.ca> From: Dmitry Gutov<dgutov@yandex.ru> Look at the timings for dictionary-pp.json. After C-s eman: master: ~100 ms ff57f30bee, or c59b8dfefa, or Emacs 28: ~20 ms That's the regression.The faster ones use a different major-mode, btw.
The old (faster) revision uses js-mode, the new one -- the optimized js-json-mode. I'm sure I could have made a mistake doing that optimization, but the behavior doesn't indicate that: the delays are higher near BOB and seem absent near EOB (in master/emacs-29), and they don't show up in the profiler in separate leaf nodes (the previous ones -- which I worked on optimizing -- did).
You can also copy the definition of js-json-mode to a file and evaluate it in the July Emacs, and use it with that file. Or enable js-mode instead in the emacs-29 Emacs. The measurements do not change here.
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