parsing performance

[12089897411]

If there is too much text content, such as a few thousand lines of html, it will cause performance degradation, and even the program will not respond！
How can this performance problem be avoided?

[keith-hall]

Generally the solutions are:

• only highlight up to 16k chars on a single line
• use a faster regex library (i.e. try fancy-regex instead of oniguruma and see if it helps
• turn off highlighting for large files