perf: use a formatter for output We use a `formatter` object in the perf extensions. This allow the use of formatted output like json. To avoid adding logic to create a formatter and pass it around to the timer function in every command, we add a `gettimer` function in charge of returning a `timer` function as simple as before but embedding an appropriate formatter. This new `gettimer` function also return the formatter as it needs to be explicitly closed at the end of the command. example output: $ hg --config ui.formatjson=True perfvolatilesets visible obsolete [ { "comb": 0.02, "count": 126, "sys": 0.0, "title": "obsolete", "user": 0.02, "wall": 0.0199398994446 }, { "comb": 0.02, "count": 117, "sys": 0.0, "title": "visible", "user": 0.02, "wall": 0.0250301361084 } ]

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#!/usr/bin/env python

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# Dump revlogs as raw data stream

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# $ find .hg/store/ -name "*.i" | xargs dumprevlog > repo.dump

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import sys

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from mercurial import revlog, node, util

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

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    util.setbinary(fp)

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for f in sys.argv[1:]:

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    binopen = lambda fn: open(fn, 'rb')

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    r = revlog.revlog(binopen, f)

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    print "file:", f

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    for i in r:

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        n = r.node(i)

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        p = r.parents(n)

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        d = r.revision(n)

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        print "node:", node.hex(n)

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        print "linkrev:", r.linkrev(i)

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        print "parents:", node.hex(p[0]), node.hex(p[1])

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        print "length:", len(d)

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        print "-start-"

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        print d

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        print "-end-"