view contrib/undumprevlog @ 42423:0ae593e791fb

profiling: show actual time spent in hotpath display

To get, for instance:

...
 \  6.6%  4.08s  lock.py:        __exit__          line 1566: ...
   |  6.5%  4.01s  exchange.py:    close           line 1191: ...
   |  6.5%  4.01s  transaction.py: _active         line 1443: ...
   |  6.5%  4.01s  transaction.py: close           line 47:   ...
   |  6.2%  3.84s  scmutil.py:     wrapped         line 529:  ...
   |  6.2%  3.81s  localrepo.py:   wrapper         line 2114: ...
   |  6.2%  3.81s  localrepo.py:   updatecaches    line 177:  ...
   ...

instead of:

...
 \  6.6%  lock.py:        __exit__          line 1566: ...
   |  6.5%  exchange.py:    close           line 1191: ...
   |  6.5%  transaction.py: _active         line 1443: ...
   |  6.5%  transaction.py: close           line 47:   ...
   |  6.2%  scmutil.py:     wrapped         line 529:  ...
   |  6.2%  localrepo.py:   wrapper         line 2114: ...
   |  6.2%  localrepo.py:   updatecaches    line 177:  ...
   ...

I find that if it's not displayed, I frequently end up estimating the
numbers by hand.

Differential Revision: https://phab.mercurial-scm.org/D6477

#!/usr/bin/env python
# Undump a dump from dumprevlog
# $ hg init
# $ undumprevlog < repo.dump

from __future__ import absolute_import, print_function

import sys
from mercurial import (
    encoding,
    node,
    pycompat,
    revlog,
    transaction,
    vfs as vfsmod,
)
from mercurial.utils import (
    procutil,
)

for fp in (sys.stdin, sys.stdout, sys.stderr):
    procutil.setbinary(fp)

opener = vfsmod.vfs(b'.', False)
tr = transaction.transaction(sys.stderr.write, opener, {b'store': opener},
                             b"undump.journal")
while True:
    l = sys.stdin.readline()
    if not l:
        break
    if l.startswith("file:"):
        f = encoding.strtolocal(l[6:-1])
        r = revlog.revlog(opener, f)
        pycompat.stdout.write(b'%s\n' % f)
    elif l.startswith("node:"):
        n = node.bin(l[6:-1])
    elif l.startswith("linkrev:"):
        lr = int(l[9:-1])
    elif l.startswith("parents:"):
        p = l[9:-1].split()
        p1 = node.bin(p[0])
        p2 = node.bin(p[1])
    elif l.startswith("length:"):
        length = int(l[8:-1])
        sys.stdin.readline() # start marker
        d = encoding.strtolocal(sys.stdin.read(length))
        sys.stdin.readline() # end marker
        r.addrevision(d, tr, lr, p1, p2)

tr.close()