Enable Http Compression

You can use compression in IIS to improve the response of your web site.
 
There are two implemented methods for compression:

• Deflate
• GZIP

 
Navigate to the AdminScripts directory in a command prompt window with administrative privileges. The default script host is wscript. For the purpose of this tip, switch to cscript with the following command
 

cscript.exe /h:cscript

 
The following commands will change various compression settings for IIS.
 

cscript.exe adsutil.vbs set W3svc/Filters/Compression/{GZIP|DEFLATE}/
{HcFileExtensions "StaticFileType" ...}|{HcScriptFileExtensions "DynamicFileType" ...}

 

Configure static compression

CSCRIPT.EXE C:\Inetpub\AdminScripts\ADSUTIL.VBS SET W3SVC/Filters/Compression/Parameters/HcDoStaticCompression TRUE
 
CSCRIPT.EXE C:\Inetpub\AdminScripts\ADSUTIL.VBS SET W3Svc/Filters/Compression/GZIP/HcFileExtensions "htm" "html" "js" "txt"
 
CSCRIPT.EXE C:\Inetpub\AdminScripts\ADSUTIL.VBS SET W3Svc/Filters/Compression/DEFLATE/HcFileExtensions "htm" "html" "js" "txt"

 

Configure dynamic file compression

CSCRIPT.EXE C:\Inetpub\AdminScripts\ADSUTIL.VBS SET W3SVC/Filters/Compression/Parameters/HcDoDynamicCompression TRUE
 
CSCRIPT.EXE C:\Inetpub\AdminScripts\ADSUTIL.VBS SET W3Svc/Filters/Compression/DEFLATE/HcScriptFileExtensions "asp" "asmx" "aspx"
CSCRIPT.EXE C:\Inetpub\AdminScripts\ADSUTIL.VBS SET W3Svc/Filters/Compression/GZIP/HcScriptFileExtensions "asp" "asmx" "aspx"

 

Set the compression level

CSCRIPT.EXE C:\Inetpub\AdminScripts\ADSUTIL.VBS SET W3Svc/Filters/Compression/GZIP/HcDynamicCompressionLevel "9"
CSCRIPT.EXE C:\Inetpub\AdminScripts\ADSUTIL.VBS SET W3Svc/Filters/Compression/DEFLATE/HcDynamicCompressionLevel "9"

 

Global compression settings

cscript.exe C:\Inetpub\AdminScripts\adsutil.vbs set w3svc/root/DoStaticCompression False
cscript.exe C:\Inetpub\AdminScripts\adsutil.vbs set w3svc/root/DoDynamicCompression False