web-mode slow down Emacs

[jcubic]

I don't know what happen but when I open a file (php with ~1.3k lines - it have 3 classes one big and two smaller ones) when I change something like type letter or space it take long to process (maybe 1-2 seconds, even progress indicator show up) on other files it work fine (instant).

It's web-mode because If I swich to php-mode or js-mode it work fine too.

[fxbois]

Is it a php only file ?

[jcubic]

yes

[fxbois]

web-mode is not suited for this kind of files. The invalidation process invalidates all the current altered block. When you edit a template, this is ok because you never have huge blocks in a template. By contrast, with a php only script, each time you modify the buffer, the entire buffer is scanned and highlighted.

I advice you to use php-mode for php only scripts

[jcubic]

Ok, too bad because indent in web-mode is right for complex nested closures and php-mode break there.

[jcubic]

4 kloc JS file work much faster with web-mode then php

[fxbois]

Strange, if they have the same size, a js file and a php file should be as slow with web-mode