Mercurial > hg
annotate hgeditor @ 31467:08ecec297521
bdiff: use Python memory allocator in fixws
Python has its own memory allocation APIs. For allocations
<= 512 bytes, it allocates memory from arenas. This means that
average small allocations don't call the system allocator, which
makes them faster. Also, arena allocations cut down on memory
fragmentation, which can matter for performance in long-running
processes.
Another advantage of using the Python memory allocator is that
allocations are tracked by Python. This is a bigger deal in
Python 3, as modern versions of Python have some decent built-in
tools for examining memory usage, leaks, etc.
This patch converts a trivial malloc() + free() in the bdiff code
to use the Python allocator APIs. Since the object being
operated on is a line, chances are it will use an arena. So,
this could have a net positive impact on performance (although
I didn't measure it).
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Thu, 09 Mar 2017 11:54:25 -0800 |
parents | 1aee2ab0f902 |
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rev | line source |
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544
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Remove bashisms and use /bin/sh instead of /bin/bash.
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1 #!/bin/sh |
186 | 2 # |
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3 # This is an example of using HGEDITOR to create of diff to review the |
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4 # changes while committing. |
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5 |
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6 # If you want to pass your favourite editor some other parameters |
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7 # only for Mercurial, modify this: |
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8 case "${EDITOR}" in |
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9 "") |
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10 EDITOR="vi" |
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11 ;; |
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12 emacs) |
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13 EDITOR="$EDITOR -nw" |
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14 ;; |
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15 gvim|vim) |
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16 EDITOR="$EDITOR -f -o" |
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17 ;; |
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18 esac |
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19 |
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20 |
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21 HGTMP="" |
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22 cleanup_exit() { |
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23 rm -rf "$HGTMP" |
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24 } |
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25 |
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26 # Remove temporary files even if we get interrupted |
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27 trap "cleanup_exit" 0 # normal exit |
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28 trap "exit 255" HUP INT QUIT ABRT TERM |
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29 |
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30 HGTMP=$(mktemp -d ${TMPDIR-/tmp}/hgeditor.XXXXXX) |
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31 [ x$HGTMP != x -a -d $HGTMP ] || { |
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32 echo "Could not create temporary directory! Exiting." 1>&2 |
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33 exit 1 |
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34 } |
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35 |
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36 ( |
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37 grep '^HG: changed' "$1" | cut -b 13- | while read changed; do |
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38 "$HG" diff "$changed" >> "$HGTMP/diff" |
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39 done |
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40 ) |
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41 |
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parents:
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42 cat "$1" > "$HGTMP/msg" |
684
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43 |
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44 MD5=$(which md5sum 2>/dev/null) || \ |
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45 MD5=$(which md5 2>/dev/null) |
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46 [ -x "${MD5}" ] && CHECKSUM=`${MD5} "$HGTMP/msg"` |
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47 if [ -s "$HGTMP/diff" ]; then |
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48 $EDITOR "$HGTMP/msg" "$HGTMP/diff" || exit $? |
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49 else |
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50 $EDITOR "$HGTMP/msg" || exit $? |
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51 fi |
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52 [ -x "${MD5}" ] && (echo "$CHECKSUM" | ${MD5} -c >/dev/null 2>&1 && exit 13) |
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53 |
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parents:
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54 mv "$HGTMP/msg" "$1" |
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55 |
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56 exit $? |