mitogen/preamble_size.py

"""
Print the size of a typical SSH command line and the bootstrap code sent to new
contexts.
"""

import inspect
import zlib

import mitogen.fakessh
import mitogen.master
import mitogen.parent
import mitogen.service
import mitogen.ssh
import mitogen.sudo

router = mitogen.master.Router()
context = mitogen.parent.Context(router, 0)
stream = mitogen.ssh.Stream(router, 0, max_message_size=0, hostname='foo')

print 'SSH command size: %s' % (len(' '.join(stream.get_boot_command())),)
print 'Preamble size: %s (%.2fKiB)' % (
    len(stream.get_preamble()),
    len(stream.get_preamble()) / 1024.0,
)

print(
    '               '
    ' '
    '  Original   '
    '  '
    '     Minimized     '
    '  '
    '    Compressed     '
)

for mod in (
        mitogen.master,
        mitogen.parent,
        mitogen.service,
        mitogen.ssh,
        mitogen.sudo,
        mitogen.fakessh,
    ):
    original = inspect.getsource(mod)
    original_size = len(original)
    minimized = mitogen.parent.minimize_source(original)
    minimized_size = len(minimized)
    compressed = zlib.compress(minimized, 9)
    compressed_size = len(compressed)
    print(
        '%-15s'
        ' '
        '%5i %4.1fKiB'
        '  '
        '%5i %4.1fKiB %.1f%%'
        '  '
        '%5i %4.1fKiB %.1f%%'
    % (
        mod.__name__,
        original_size,
        original_size / 1024.0,
        minimized_size,
        minimized_size / 1024.0,
        100 * minimized_size / float(original_size),
        compressed_size,
        compressed_size / 1024.0,
        100 * compressed_size / float(original_size),
    ))