view contrib/memory.py @ 51301:58d39c7865e5

usage: configure uncompressed chunk cache through resource configuration

Let's use this new concept for what it is meant for.

This provides a sizable speed up for reading multiple revision for some complexe
repositories.


### data-env-vars.name            = pypy-2018-08-01-zstd-sparse-revlog
  # benchmark.name                = hg.perf.read-revisions
  # benchmark.variants.order      = reverse
memory-medium: 1.892400
memory-high:   1.722934   (-8.61%)
  # benchmark.variants.order      = default
memory-medium: 1.751542
memory-high:   1.589340   (-9.49%)

# memory.py - track memory usage
#
# Copyright 2009 Olivia Mackall <[e-mail]> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

'''helper extension to measure memory usage

Reads current and peak memory usage from ``/proc/self/status`` and
prints it to ``stderr`` on exit.
'''


def memusage(ui):
    """Report memory usage of the current process."""
    result = {'peak': 0, 'rss': 0}
    with open('/proc/self/status', 'r') as status:
        # This will only work on systems with a /proc file system
        # (like Linux).
        for line in status:
            parts = line.split()
            key = parts[0][2:-1].lower()
            if key in result:
                result[key] = int(parts[1])
    ui.write_err(
        ", ".join(
            ["%s: %.1f MiB" % (k, v / 1024.0) for k, v in result.iteritems()]
        )
        + "\n"
    )


def extsetup(ui):
    ui.atexit(memusage, ui)