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bug#56682: Fix the long lines font locking related slowdowns


From: Dmitry Gutov
Subject: bug#56682: Fix the long lines font locking related slowdowns
Date: Mon, 15 Aug 2022 12:56:46 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1

On 15.08.2022 06:10, Ihor Radchenko wrote:
The fact that MMM-mode is relying on narrowing is a bug in MMM-mode.
Polymode (an alternative to MMM-mode) is using a different approach.

Does it really?

From what I see, Polymode does use narrowing: https://github.com/polymode/polymode/search?q=narrow&type=code

But it also contains provisions for modes whose syntax highlighting cannot function with it. With different tradeoffs.





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