From: ynyaaa@gmail.com
To: Eli Zaretskii <eliz@gnu.org>
Cc: 26051@debbugs.gnu.org
Subject: bug#26051: 25.1; overlays may make emacs very slow
Date: Sat, 11 Mar 2017 13:22:48 +0900 [thread overview]
Message-ID: <874lz0o31j.fsf@gmail.com> (raw)
In-Reply-To: <87varh3xql.fsf@gmail.com>
Eli Zaretskii <eliz@gnu.org> writes:
> The overlays is not the main problem here, the main problem is that
> your buffer is made of digits, which are neutral characters for the
> bidirectional display, so it needs to work much harder. Compare with
> this:
>
> (let ((n 65536))
> (save-excursion (dotimes (i n) (insert (format "a%d\n" i))))
> (dotimes (i n) (make-overlay (point) (progn (forward-line) (point))))
> (message "Done."))
>
> I see no bugs here, just known issues/limitations of the current
> display engine.
I want the buffer to be unchanged.
And I don't know what characters are neutral.
The form above take a few seconds.
I tried some characters instead of 'a'. Each of them take long time.
"@%d\n"
"?%d\n"
"\u00E1%d\n" ;; LATIN SMALL LETTER A WITH ACUTE
"\u3042%d\n" ;; HIRAGANA LETTER A
"\u4E00%d\n" ;; CJK IDEOGRAPH-4E00
"\uFF41%d\n" ;; FULLWIDTH LATIN SMALL LETTER A
next prev parent reply other threads:[~2017-03-11 4:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-10 16:25 bug#26051: 25.1; overlays may make emacs very slow ynyaaa
2017-03-10 17:02 ` Eli Zaretskii
2017-03-11 4:22 ` ynyaaa [this message]
2017-03-11 6:59 ` Eli Zaretskii
2017-03-12 1:44 ` ynyaaa
2017-03-12 15:47 ` Eli Zaretskii
2017-03-13 11:18 ` ynyaaa
2017-03-13 11:29 ` Andreas Politz
2017-03-13 15:54 ` Eli Zaretskii
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