upstream/mercurial-mirror Files · mercurial/httprangereader.py

Fix cold cache diff performance...

Fix cold cache diff performance cold cache diff performance has regressed in two ways. localrepo.changes has optimizations for diffing against the working dir parent that expect node1 to be None. commands.revpair() usage means that commands.dodiff() never sends node1 == None. This is fixed in localrepo.changes by checking against the dirstate parents. In the non-dirstate parents case, localrepo.changes does a loop comparing files without first sorting the file names, leading to random access across the disk.

Alexis S. L. Carvalho - - Load All Authors

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      # httprangereader.py - just what it says

      #

      # Copyright 2005 Matt Mackall <mpm@selenic.com>

      #

      # This software may be used and distributed according to the terms

      # of the GNU General Public License, incorporated herein by reference.

      import byterange, urllib2

      class httprangereader(object):

          def __init__(self, url):

              self.url = url

              self.pos = 0

          def seek(self, pos):

              self.pos = pos

          def read(self, bytes=None):

              opener = urllib2.build_opener(byterange.HTTPRangeHandler())

              urllib2.install_opener(opener)

              req = urllib2.Request(self.url)

              end = ''

              if bytes:

                  end = self.pos + bytes - 1

              req.add_header('Range', 'bytes=%d-%s' % (self.pos, end))

              f = urllib2.urlopen(req)

              data = f.read()

              if bytes:

                  data = data[:bytes]

              return data

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				# httprangereader.py - just what it says
				#
				# Copyright 2005 Matt Mackall <mpm@selenic.com>
				#
				# This software may be used and distributed according to the terms
				# of the GNU General Public License, incorporated herein by reference.

				import byterange, urllib2

				class httprangereader(object):
				def __init__(self, url):
				self.url = url
				self.pos = 0
				def seek(self, pos):
				self.pos = pos
				def read(self, bytes=None):
				opener = urllib2.build_opener(byterange.HTTPRangeHandler())
				urllib2.install_opener(opener)
				req = urllib2.Request(self.url)
				end = ''
				if bytes:
				end = self.pos + bytes - 1
				req.add_header('Range', 'bytes=%d-%s' % (self.pos, end))
				f = urllib2.urlopen(req)
				data = f.read()
				if bytes:
				data = data[:bytes]
				return data