1 create verbosemmap.py

     2   $ cat << EOF > verbosemmap.py

     3   > # extension to make util.mmapread verbose

     4   > 

     5   > from __future__ import absolute_import

     6   > 

     7   > from mercurial import (

     8   >     extensions,

     9   >     util,

    10   > )

    11   > 

    12   > def mmapread(orig, fp):

    13   >     print "mmapping %s" % fp.name

    14   >     return orig(fp)

    15   > 

    16   > def extsetup(ui):

    17   >     extensions.wrapfunction(util, 'mmapread', mmapread)

    18   > EOF

    19 

    20 setting up base repo

    21   $ hg init a

    22   $ cd a

    23   $ touch a

    24   $ hg add a

    25   $ hg commit -qm base

    26   $ for i in `$TESTDIR/seq.py 1 100` ; do

    27   > echo $i > a

    28   > hg commit -qm $i

    29   > done

    30 

    31 set up verbosemmap extension

    32   $ cat << EOF >> $HGRCPATH

    33   > [extensions]

    34   > verbosemmap=$TESTTMP/verbosemmap.py

    35   > EOF

    36 

    37 mmap index which is now more than 4k long

    38   $ hg log -l 5 -T '{rev}\n' --config experimental.mmapindexthreshold=4k

    39   mmapping $TESTTMP/a/.hg/store/00changelog.i (glob)

    40   100

    41   99

    42   98

    43   97

    44   96

    45 

    46 do not mmap index which is still less than 32k

    47   $ hg log -l 5 -T '{rev}\n' --config experimental.mmapindexthreshold=32k

    48   100

    49   99

    50   98

    51   97

    52   96

    53 

    54   $ cd ..