We now tell Wix to run MSZIP compression on all of the msi files. Now that installer.exe is part of the File table, it will get compressed. This has added a lot of time to the windows install builds.
We only ship the English msi files. The non-English msi files are created only to generate the transforms (binary differences of the msi for localization). We should create a wix compiler flag to switch on/off MSZIP compression, and only have it on during the compilation of the English msi object file.