From: Dmitry Gutov <dgutov@yandex.ru>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 20154@debbugs.gnu.org
Subject: bug#20154: 25.0.50; json-encode-string is too slow for large strings
Date: Fri, 20 Mar 2015 18:52:26 +0200 [thread overview]
Message-ID: <550C504A.10708@yandex.ru> (raw)
In-Reply-To: <83siczvcss.fsf@gnu.org>
On 03/20/2015 06:44 PM, Eli Zaretskii wrote:
> To see how much of the time is taken by json-encode-char, replace it
> with something trivial, like 1+, and see what speedup you get.
Yep. Replacing the second definition with
(defun json-encode-big-string (str)
(with-temp-buffer
(insert str)
(goto-char (point-min))
(while (re-search-forward "[\"\\/\b\f\b\r\t]\\|[^ -~]" nil t)
(replace-match "z" t t))
(format "\"%s\"" (buffer-string))))
still makes it take ~100ms on the example string (as opposed to 2ms in
the optimized Python implementation).
next prev parent reply other threads:[~2015-03-20 16:52 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-20 14:26 bug#20154: 25.0.50; json-encode-string is too slow for large strings Dmitry Gutov
2015-03-20 14:34 ` Eli Zaretskii
2015-03-20 14:43 ` Dmitry Gutov
2015-03-20 15:03 ` Eli Zaretskii
2015-03-20 15:20 ` Dmitry Gutov
2015-03-20 16:02 ` Eli Zaretskii
2015-03-20 16:21 ` Dmitry Gutov
2015-03-20 16:44 ` Eli Zaretskii
2015-03-20 16:52 ` Dmitry Gutov [this message]
2015-03-20 17:44 ` Eli Zaretskii
2015-03-20 18:42 ` Dmitry Gutov
2015-03-20 21:14 ` Eli Zaretskii
2015-03-20 22:02 ` Dmitry Gutov
2015-03-21 7:58 ` Eli Zaretskii
2015-03-21 8:12 ` Eli Zaretskii
2015-03-21 20:00 ` Dmitry Gutov
2015-03-21 20:25 ` Eli Zaretskii
2015-03-21 21:26 ` Dmitry Gutov
2015-03-22 17:31 ` Eli Zaretskii
2015-03-22 18:13 ` Dmitry Gutov
2015-03-22 18:26 ` Dmitry Gutov
2015-03-22 18:32 ` Eli Zaretskii
2015-03-22 19:03 ` Dmitry Gutov
2015-03-21 21:05 ` Drew Adams
2015-03-21 21:32 ` Dmitry Gutov
2015-04-20 22:20 ` Ted Zlatanov
2015-04-20 22:41 ` Dmitry Gutov
2015-04-20 23:11 ` Ted Zlatanov
2015-03-20 22:26 ` Dmitry Gutov
2015-03-21 8:07 ` Eli Zaretskii
2015-03-21 21:09 ` Dmitry Gutov
2015-03-21 22:20 ` Ivan Shmakov
2015-03-21 23:36 ` Dmitry Gutov
2015-03-22 14:52 ` Dmitry Gutov
2015-03-22 16:15 ` Ivan Shmakov
2015-03-22 16:47 ` Dmitry Gutov
2015-03-22 17:43 ` Eli Zaretskii
2015-03-22 19:15 ` Ivan Shmakov
2015-03-22 16:51 ` Eli Zaretskii
2015-03-22 18:22 ` Glenn Morris
2015-03-22 16:50 ` Eli Zaretskii
2015-03-22 17:10 ` Dmitry Gutov
2015-03-22 22:57 ` Dmitry Gutov
2015-03-23 15:37 ` Eli Zaretskii
2015-04-07 13:31 ` Dmitry Gutov
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