I completely agree with this and #2 is straight forward to do below. We should 
be able to make it so. Should we get a WIP written up?

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From: Chris Dahlberg [mailto:csdahlb...@gmail.com]
Sent: Tuesday, October 21, 2014 6:53 PM
To: WiX toolset developer mailing list
Subject: Re: [WiX-devs] WiX v4.0 Default Compression Level?

With cab count appearing to have even more of an impact on link time than the 
compression level, I agree that halving it to 100MB is a good idea.

I think whether different defaults can be used for Debug vs. Release builds 
could somewhat determine what the best default values are.

  *   If the same defaults are to be used for both Debug and Release, sticking 
with MSZip seems like the best option (based on a very simple lower-is-better 
ranking using [Link time] * [Cab size]). Changing from MSZip to Low wouldn't be 
terrible, either, but does result in a ~50% increase in link time for only an 
~11% decrease in file size.
  *   If different defaults can be used for Debug vs. Release, then I still 
think using None for Debug and High for Release would be ideal. Releases are 
often copied/downloaded many times, and dealing with a lengthier build process 
a small number of times to benefit from smaller file copies/downloads many 
times seems worth it to me.
-Chris-


On Sun, Oct 19, 2014 at 3:31 PM, Bob Arnson 
<b...@joyofsetup.com<mailto:b...@joyofsetup.com>> wrote:
On 18-Oct-14 21:02, Rob Mensching wrote:

First, picking reasonable defaults for things in WiX is the only way we’ll 
reduce the complexity. However, exposing the full power of the Windows 
Installer for those that want/need it is also still very important.

Second, thank you for the data point on “medium” vs. “high”. I’ve heard that 
data point from others that the time difference doesn’t work out sometimes. 
Bob’s point about measuring is probably still  a thing to do.
Yep. http://www.joyofsetup.com/2014/10/19/cabinet-compression-testing/


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