syntax-propertize-function 是做什么的, 几千行的代码,编辑起来被这东西搞得很慢,注释掉后, 快了非常多..

Emacs-Lisp
1 
(defun php-syntax-propertize-function (start end)
  "Apply propertize rules from START to END."
  (goto-char start)
  (while (and (< (point) end)
              (re-search-forward php-heredoc-start-re end t)
              )
    (php-heredoc-syntax))
  (goto-char start)
  (while (re-search-forward "['\"]" end t)
    (when (php-in-comment-p)
      (c-put-char-property (match-beginning 0)
                           'syntax-table (string-to-syntax "_"))))
  (funcall
   (syntax-propertize-rules
    ("\\(\"\\)\\(\\\\.\\|[^\"\n\\]\\)*\\(\"\\)" (1 "\"") (3 "\""))
    ("\\('\\)\\(\\\\.\\|[^'\n\\]\\)*\\('\\)" (1 "\"") (3 "\"")))
   start end))
2

做高亮的。看來你不需要這個。

3

貌似也没什么差别, 高亮还是有

4

有些大文件5000行以上的, 复制,粘贴保存一下, 都要10多20秒, profiler-report 后看到是因为这个函数, 就想注释掉看看…