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bundle2: implement consume() API on unbundlepart...
bundle2: implement consume() API on unbundlepart We want bundle parts to not be seekable by default. That means eliminating the generic seek() method. A common pattern in bundle2.py is to seek to the end of the part data. This is mainly used by the part iteration code to ensure the underlying stream is advanced to the next bundle part. In this commit, we establish a dedicated API for consuming a bundle2 part data. We switch users of seek() to it. The old implementation of seek(0, os.SEEK_END) would effectively call self.read(). The new implementation calls self.read(32768) in a loop. The old implementation would therefore assemble a buffer to hold all remaining data being seeked over. For seeking over large bundle parts, this would involve a large allocation and a lot of overhead to collect intermediate data! This overhead can be seen in the results for `hg perfbundleread`: ! bundle2 iterparts() ! wall 10.891305 comb 10.820000 user 7.990000 sys 2.830000 (best of 3) ! wall 8.070791 comb 8.060000 user 7.180000 sys 0.880000 (best of 3) ! bundle2 part seek() ! wall 12.991478 comb 10.390000 user 7.720000 sys 2.670000 (best of 3) ! wall 10.370142 comb 10.350000 user 7.430000 sys 2.920000 (best of 3) Of course, skipping over large payload data isn't likely very common. So I doubt the performance wins will be observed in the wild. Differential Revision: https://phab.mercurial-scm.org/D1388

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r30888:561a019c stable
r35111:db503852 default
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mercurial.wxs
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<?xml version='1.0' encoding='windows-1252'?>
<Wix xmlns='http://schemas.microsoft.com/wix/2006/wi'>
<!-- Copyright 2010 Steve Borho <steve@borho.org>
This software may be used and distributed according to the terms of the
GNU General Public License version 2 or any later version. -->
<?include guids.wxi ?>
<?include defines.wxi ?>
<?if $(var.Platform) = "x64" ?>
<?define PFolder = ProgramFiles64Folder ?>
<?else?>
<?define PFolder = ProgramFilesFolder ?>
<?endif?>
<Product Id='*'
Name='Mercurial $(var.Version) ($(var.Platform))'
UpgradeCode='$(var.ProductUpgradeCode)'
Language='1033' Codepage='1252' Version='$(var.Version)'
Manufacturer='Matt Mackall and others'>
<Package Id='*'
Keywords='Installer'
Description="Mercurial distributed SCM (version $(var.Version))"
Comments='$(var.Comments)'
Platform='$(var.Platform)'
Manufacturer='Matt Mackall and others'
InstallerVersion='300' Languages='1033' Compressed='yes' SummaryCodepage='1252' />
<Media Id='1' Cabinet='mercurial.cab' EmbedCab='yes' DiskPrompt='CD-ROM #1'
CompressionLevel='high' />
<Property Id='DiskPrompt' Value="Mercurial $(var.Version) Installation [1]" />
<Condition Message='Mercurial MSI installers require Windows XP or higher'>
VersionNT >= 501
</Condition>
<Property Id="INSTALLDIR">
<ComponentSearch Id='SearchForMainExecutableComponent'
Guid='$(var.ComponentMainExecutableGUID)' />
</Property>
<!--Property Id='ARPCOMMENTS'>any comments</Property-->
<Property Id='ARPCONTACT'>mercurial@mercurial-scm.org</Property>
<Property Id='ARPHELPLINK'>https://mercurial-scm.org/wiki/</Property>
<Property Id='ARPURLINFOABOUT'>https://mercurial-scm.org/about/</Property>
<Property Id='ARPURLUPDATEINFO'>https://mercurial-scm.org/downloads/</Property>
<Property Id='ARPHELPTELEPHONE'>https://mercurial-scm.org/wiki/Support</Property>
<Property Id='ARPPRODUCTICON'>hgIcon.ico</Property>
<Property Id='INSTALLEDMERCURIALPRODUCTS' Secure='yes'></Property>
<Property Id='REINSTALLMODE'>amus</Property>
<!--Auto-accept the license page-->
<Property Id='LicenseAccepted'>1</Property>
<Directory Id='TARGETDIR' Name='SourceDir'>
<Directory Id='$(var.PFolder)' Name='PFiles'>
<Directory Id='INSTALLDIR' Name='Mercurial'>
<Component Id='MainExecutable' Guid='$(var.ComponentMainExecutableGUID)' Win64='$(var.IsX64)'>
<File Id='hgEXE' Name='hg.exe' Source='dist\hg.exe' KeyPath='yes' />
<Environment Id="Environment" Name="PATH" Part="last" System="yes"
Permanent="no" Value="[INSTALLDIR]" Action="set" />
</Component>
<Component Id='ReadMe' Guid='$(var.ReadMe.guid)' Win64='$(var.IsX64)'>
<File Id='ReadMe' Name='ReadMe.html' Source='contrib\win32\ReadMe.html'
KeyPath='yes'/>
</Component>
<Component Id='COPYING' Guid='$(var.COPYING.guid)' Win64='$(var.IsX64)'>
<File Id='COPYING' Name='COPYING.rtf' Source='contrib\wix\COPYING.rtf'
KeyPath='yes'/>
</Component>
<Directory Id='HGRCD' Name='hgrc.d'>
<Component Id='mercurial.rc' Guid='$(var.mercurial.rc.guid)' Win64='$(var.IsX64)'>
<File Id='mercurial.rc' Name='Mercurial.rc' Source='contrib\win32\mercurial.ini'
ReadOnly='yes' KeyPath='yes'/>
</Component>
<Component Id='mergetools.rc' Guid='$(var.mergetools.rc.guid)' Win64='$(var.IsX64)'>
<File Id='mergetools.rc' Name='MergeTools.rc' Source='mercurial\default.d\mergetools.rc'
ReadOnly='yes' KeyPath='yes'/>
</Component>
</Directory>
</Directory>
</Directory>
<Directory Id="ProgramMenuFolder" Name="Programs">
<Directory Id="ProgramMenuDir" Name="Mercurial $(var.Version)">
<Component Id="ProgramMenuDir" Guid="$(var.ProgramMenuDir.guid)" Win64='$(var.IsX64)'>
<RemoveFolder Id='ProgramMenuDir' On='uninstall' />
<RegistryValue Root='HKCU' Key='Software\Mercurial\InstallDir' Type='string'
Value='[INSTALLDIR]' KeyPath='yes' />
<Shortcut Id='UrlShortcut' Directory='ProgramMenuDir' Name='Mercurial Web Site'
Target='[ARPHELPLINK]' Icon="hgIcon.ico" IconIndex='0' />
</Component>
</Directory>
</Directory>
<?if $(var.Platform) = "x86" ?>
<Merge Id='VCRuntime' DiskId='1' Language='1033'
SourceFile='$(var.VCRedistSrcDir)\microsoft.vcxx.crt.x86_msm.msm' />
<Merge Id='VCRuntimePolicy' DiskId='1' Language='1033'
SourceFile='$(var.VCRedistSrcDir)\policy.x.xx.microsoft.vcxx.crt.x86_msm.msm' />
<?else?>
<Merge Id='VCRuntime' DiskId='1' Language='1033'
SourceFile='$(var.VCRedistSrcDir)\microsoft.vcxx.crt.x64_msm.msm' />
<Merge Id='VCRuntimePolicy' DiskId='1' Language='1033'
SourceFile='$(var.VCRedistSrcDir)\policy.x.xx.microsoft.vcxx.crt.x64_msm.msm' />
<?endif?>
</Directory>
<Feature Id='Complete' Title='Mercurial' Description='The complete package'
Display='expand' Level='1' ConfigurableDirectory='INSTALLDIR' >
<Feature Id='MainProgram' Title='Program' Description='Mercurial command line app'
Level='1' Absent='disallow' >
<ComponentRef Id='MainExecutable' />
<ComponentRef Id='distOutput' />
<ComponentRef Id='libOutput' />
<ComponentRef Id='ProgramMenuDir' />
<ComponentRef Id='ReadMe' />
<ComponentRef Id='COPYING' />
<ComponentRef Id='mercurial.rc' />
<ComponentRef Id='mergetools.rc' />
<ComponentGroupRef Id='helpFolder' />
<ComponentGroupRef Id='templatesFolder' />
<MergeRef Id='VCRuntime' />
<MergeRef Id='VCRuntimePolicy' />
</Feature>
<Feature Id='Locales' Title='Translations' Description='Translations' Level='1'>
<ComponentGroupRef Id='localeFolder' />
<ComponentRef Id='i18nFolder' />
</Feature>
<Feature Id='Documentation' Title='Documentation' Description='HTML man pages' Level='1'>
<ComponentGroupRef Id='docFolder' />
</Feature>
<Feature Id='Misc' Title='Miscellaneous' Description='Contributed scripts' Level='1'>
<ComponentGroupRef Id='contribFolder' />
</Feature>
</Feature>
<UIRef Id="WixUI_FeatureTree" />
<UIRef Id="WixUI_ErrorProgressText" />
<WixVariable Id="WixUILicenseRtf" Value="contrib\wix\COPYING.rtf" />
<Icon Id="hgIcon.ico" SourceFile="contrib/win32/mercurial.ico" />
<Upgrade Id='$(var.ProductUpgradeCode)'>
<UpgradeVersion
IncludeMinimum='yes' Minimum='0.0.0' IncludeMaximum='no' OnlyDetect='no'
Property='INSTALLEDMERCURIALPRODUCTS' />
</Upgrade>
<InstallExecuteSequence>
<RemoveExistingProducts After='InstallInitialize'/>
</InstallExecuteSequence>
</Product>
</Wix>