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bug#23223: 25.0.92; Can xref-find-references be sped up?
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From: |
Eli Zaretskii |
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Subject: |
bug#23223: 25.0.92; Can xref-find-references be sped up? |
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Date: |
Tue, 05 Apr 2016 18:16:04 +0300 |
With an ID database present in the Emacs top-level directory, do this:
emacs -Q
C-x C-f src/buffer.c RET
C-u 1316 M-x goto-char RET
You should now see point on "current_buffer". Now:
M-x xref-find-references RET RET
When prompted for the project directory, remove the "src/" part, to
specify the root of the Emacs tree, and type RET.
This takes around 13 sec here, although the corresponding 'lid'
command:
lid --result=grep -l -w current_buffer
takes only 0.07 sec.
The important part of the Lisp-level profile appears below. It looks
like we are visiting each match of each file in the list of matches,
and that takes most of the time. Can this be avoided somehow? The
'lid' command already includes all the matches in Grep format, so why
are we visiting each match, when the information should be already
available?
- command-execute 833 92%
- call-interactively 833 92%
- funcall-interactively 830 92%
- execute-extended-command 830 92%
- command-execute 826 91%
- call-interactively 815 90%
- funcall-interactively 813 90%
- xref-find-references 813 90%
- xref--find-xrefs 813 90%
- xref-backend-references 800 88%
- cl-mapcan 788 87%
- apply 788 87%
- cl-mapcar 788 87%
- mapcar 788 87%
- #<compiled 0x200000000842dea0> 788 87%
- xref-collect-references 788 87%
- cl-mapcan 770 85%
- apply 770 85%
- cl-mapcar 770 85%
- mapcar 770 85%
- #<compiled 0x20000000084ea738> 770 85%
- xref--collect-matches 728 80%
- semantic-find-file-noselect 556 61%
- find-file-noselect 556 61%
- find-file-noselect-1 519 57%
- after-find-file 503 55%
- normal-mode 499 55%
- set-auto-mode 493 54%
- set-auto-mode-0 488 54%
- c-mode 488 54%
- c-common-init 480 53%
- mapc 473 52%
- #<compiled 0x2000000001c06b28> 472 52%
- c-neutralize-syntax-in-and-mark-CPP 466
51%
- c-extend-font-lock-region-for-macros 205
22%
- c-state-literal-at 205
22%
- c-state-safe-place 199
22%
- c-beginning-of-macro 3
0%
back-to-indentation 3
0%
c-syntactic-end-of-macro 1
0%
c-syntactic-end-of-macro 9
1%
c-neutralize-CPP-line 7
0%
- c-beginning-of-macro 4
0%
back-to-indentation 2
0%
#<compiled 0x2000000001c06b00> 1
0%
- c-basic-common-init 7
0%
- c-set-style 4
0%
- mapc 4
0%
- #<compiled 0x2000000001ae61c0> 4
0%
- c-set-style-1 2
0%
- mapcar 2
0%
#<compiled 0x2000000001ae53a0> 1
0%
- run-mode-hooks 3
0%
In GNU Emacs 25.0.92.75 (i686-pc-mingw32)
of 2016-04-04 built on HOME-C4E4A596F7
Repository revision: f501116ea896b20f195f5c841e8770d7fe0418b9
Windowing system distributor 'Microsoft Corp.', version 5.1.2600
Configured using:
'configure --prefix=/d/usr --enable-checking=yes,glyphs --with-wide-int
--with-modules 'CFLAGS=-O0 -gdwarf-4 -g3''
Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY ACL GNUTLS LIBXML2 ZLIB
TOOLKIT_SCROLL_BARS MODULES
Important settings:
value of $LANG: ENU
locale-coding-system: cp1255
Major mode: Lisp Interaction
Minor modes in effect:
tooltip-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t
Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Load-path shadows:
None found.
Features:
(shadow sort mail-extr emacsbug message dired format-spec rfc822 mml
mml-sec password-cache epg epg-config gnus-util mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail
rfc2047 rfc2045 ietf-drums mm-util help-fns help-mode easymenu
cl-loaddefs pcase cl-lib mail-prsvr mail-utils time-date mule-util
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel dos-w32 ls-lisp disp-table w32-win w32-vars term/common-win
tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment
elisp-mode lisp-mode prog-mode register page menu-bar rfn-eshadow timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
frame cl-generic cham georgian utf-8-lang misc-lang vietnamese tibetan
thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian
slovak czech european ethiopic indian cyrillic chinese charscript
case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer
cl-preloaded nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote w32notify w32 multi-tty
make-network-process emacs)
Memory information:
((conses 16 93253 6020)
(symbols 56 20721 0)
(miscs 48 36 107)
(strings 16 17749 6443)
(string-bytes 1 439871)
(vectors 16 12404)
(vector-slots 8 429720 3894)
(floats 8 162 70)
(intervals 40 261 118)
(buffers 856 11))