Re[1]: [cedet-semantic] Updating tag table slow on large Java file

[Eric M. L. <er...@si...>]

Hi,

  Sorry for a late reply.

  You can probably add a hook to `semantic--before-fetch-tags-hook'
  to solve this problem.

  In your hook function, you could decide if you really want the file
  parsed or not, then return nil or t.

  for example

(add-hook 'semantic--before-fetch-tags-hook
    (lambda ()
      (if (> (point-max) 50000)
          nil
        t)))

  for just a brute form.  You could get more elegant by asking if the
  tag cache is non-nil, so it parses at user requested flush time
  like this:

(add-hook 'semantic--before-fetch-tags-hook
    (lambda ()
      (if (and (> (point-max) 50000)
      	       (not (semantic-parse-tree-needs-rebuild-p)))
          nil
        t)))

  If you settle on something you like, I can add it to semantic as an
option.

Eric

>>> "David Ishee" <o5l...@sn...> seems to think that:
>I have a very large Java source file that I sometimes have to work
>with. Everytime the message "Update Tag Table" appears in the
>minibuffer, it takes 5-10 seconds to complete and causes XEmacs to
>completely freeze for the duration of its operation.
>
>
>
>I found this message in semantic-edit.el in this section of code in
>the function semantic-edits-incremental-parser:
>
>
>
>;;;; One token was updated.
>
>             ((and (= (length tokens) 1) (= (length newf-tokens) 1))
>
>              ;; One old token was modified, and it is replaced by
>
>              ;; One newfound token.  Splice the new token into the
>
>              ;; position of the old token.
>
>              ;; Do the splice.
>
>              (semantic-edits-splice-replace (car tokens) (car newf-tokens))
>
>              ;; Add this token to our list of changed toksns
>
>              (setq changed-tokens (cons (car tokens) changed-tokens))
>
>              ;; Debug
>
>              (message "Update Tag Table: %s"
>
>                       (semantic-format-tag-name (car tokens) nil t))
>
>              ;; Flush change regardless of above if statement.
>
>              )
>
>
>
>
>
>Is there any way I can control how often the tag table gets updated?
>Is there any way this function can be optimized?
>
>
>
>This Java file has about 15500 lines in it. This is the only monster
>Java file I have to work with where this issue is a problem.
>
>
>
>(Please no flames on file size)
>
>
>
>Any other ideas for workarounds?
>
>
>
>Thanks,
>
>David
>
>
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-- 
          Eric Ludlam:                 za...@gn..., er...@si...
   Home: http://www.ludlam.net            Siege: www.siege-engine.com
Emacs: http://cedet.sourceforge.net               GNU: www.gnu.org