From: Dan Nicolaescu <dann@ics.uci.edu>
To: emacs-devel@gnu.org
Subject: profiling emacs-23.1 vs emacs-22.3
Date: Mon, 3 Aug 2009 13:29:44 -0700 (PDT) [thread overview]
Message-ID: <200908032029.n73KTi9h017528@godzilla.ics.uci.edu> (raw)
I run a small test.
Take src/config.h run C-x r t on it to insert a space in front of each
line.
Then build both emacs-23.1 and 22.3 with profiling enabled (-O2 -g -pg).
Then run:
emacs -Q -nw config.h
M-: (indent-region (point-min)(point-max)) RET
C-x C-c
The 22.3 gprof results:
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self self total
time seconds seconds calls ms/call ms/call name
41.29 7.13 7.13 4653244 0.00 0.00 forw_comment
16.10 9.91 2.78 32473 0.09 0.31 scan_sexps_forward
9.09 11.48 1.57 15132 0.10 0.15 re_search_2
5.62 12.45 0.97 17286 0.06 0.15 scan_lists
5.59 13.41 0.96 33462255 0.00 0.00 lookup_char_property
3.36 13.99 0.58 18478958 0.00 0.00 next_interval
2.14 14.37 0.37 129733 0.00 0.00 mark_object
1.80 14.68 0.31 137020 0.00 0.00 skip_chars
1.74 14.97 0.30 14459993 0.00 0.00 previous_interval
1.62 15.26 0.28 57446793 0.00 0.00 Fcdr
1.36 15.49 0.23 2156082 0.00 0.00 update_syntax_table
1.27 15.71 0.22 3315615 0.00 0.00 re_match_2_internal
1.19 15.91 0.20 23687203 0.00 0.00 Fassq
0.87 16.07 0.15 13478 0.01 0.06 Fprevious_single_property_change
0.75 16.20 0.13 33462255 0.00 0.00 textget
0.75 16.32 0.13 228439 0.00 0.00 Fbyte_code
0.52 16.41 0.09 1978403 0.00 0.00 update_interval
0.46 16.50 0.08 1101056 0.00 0.00 find_interval
0.29 16.55 0.05 3613429 0.00 0.00 buf_bytepos_to_charpos
0.26 16.59 0.04 10137050 0.00 0.00 Fcar
0.26 16.64 0.04 1154883 0.00 0.00 balance_an_interval
0.23 16.68 0.04 579275 0.00 0.00 unbind_to
The 23.1 gprof results:
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self self total
time seconds seconds calls s/call s/call name
29.60 7.03 7.03 406111658 0.00 0.00 char_table_ref
26.72 13.37 6.34 4653244 0.00 0.00 forw_comment
11.80 16.17 2.80 32121 0.00 0.00 scan_sexps_forward
5.98 17.59 1.42 23271 0.00 0.00 re_search_2
5.27 18.84 1.25 17289 0.00 0.00 scan_lists
4.13 19.82 0.98 33439981 0.00 0.00 lookup_char_property
1.94 20.28 0.46 18488739 0.00 0.00 next_interval
1.73 20.69 0.41 10038210 0.00 0.00 mark_object
1.26 20.99 0.30 2156799 0.00 0.00 update_syntax_table
1.20 21.27 0.29 sub_char_table_ref
1.10 21.53 0.26 14455134 0.00 0.00 previous_interval
0.88 21.74 0.21 57391428 0.00 0.00 Fcdr
0.88 21.95 0.21 3318263 0.00 0.00 re_match_2_internal
0.72 22.12 0.17 23671456 0.00 0.00 Fassq
0.67 22.28 0.16 196373 0.00 0.00 Fbyte_code
0.59 22.42 0.14 13478 0.00 0.00 Fprevious_single_property_change
0.51 22.54 0.12 38 0.00 0.02 Fgarbage_collect
0.38 22.63 0.09 33439981 0.00 0.00 textget
0.38 22.72 0.09 10115583 0.00 0.00 Fcar
[snip]
-----------------------------------------------
0.05 0.22 612/32121 back_comment [28]
2.75 11.33 31509/32121 Fparse_partial_sexp [6]
[5] 60.5 2.80 11.55 32121 scan_sexps_forward [5]
5.17 3.76 3796695/4653244 forw_comment [7]
1.62 0.00 93379139/406111658 char_table_ref [8]
0.15 0.86 1092890/2156799 update_syntax_table [11]
0.00 0.00 5096/10115583 Fcar [46]
0.00 0.00 6552/57391428 Fcdr [33]
0.00 0.00 147/952550 Fcons [105]
It can be seen that 23.1 is quite a bit slower, and that it has a lot of
extra calls to char_table_ref.
Are those calls necessary?
next reply other threads:[~2009-08-03 20:29 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-03 20:29 Dan Nicolaescu [this message]
2009-08-04 17:10 ` profiling emacs-23.1 vs emacs-22.3 Leo
2009-08-04 19:50 ` Chong Yidong
2009-08-04 19:56 ` Dan Nicolaescu
2009-08-05 7:47 ` Dan Nicolaescu
2009-08-24 6:52 ` Kenichi Handa
[not found] ` <200908240807.n7O87ubg024643@godzilla.ics.uci.edu>
2009-08-24 11:39 ` Kenichi Handa
2009-08-24 18:26 ` Dan Nicolaescu
2009-08-25 6:07 ` Kenichi Handa
2009-08-25 18:47 ` Dan Nicolaescu
2009-08-26 6:01 ` Kenichi Handa
2009-08-26 6:33 ` Dan Nicolaescu
2009-08-26 8:06 ` Kenichi Handa
2009-08-26 20:46 ` Andreas Schwab
2009-08-27 2:02 ` Kenichi Handa
2009-08-27 6:27 ` Kenichi Handa
2009-08-24 22:18 ` Alan Mackenzie
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200908032029.n73KTi9h017528@godzilla.ics.uci.edu \
--to=dann@ics.uci.edu \
--cc=emacs-devel@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.