I have an Inno Setup script to make my application into an exe.
When I compile the code using Inno Setup version 6, the output file size is 110MB (as shown in Windows Explorer size column)
But when I compile the same script in Inno Setup version 5, the output file size is 109MB (1 MB smaller).
Why there is a difference in size? Is this a problem?
A compiled installer is actually an identical copy of SetupLdr.e32 with a compressed copy of Setup.e32 appended (along with actual installation files). Both these files are present in Inno Setup installation folder.
Those two files have:
- 0.68 + 2.41 MB in Inno Setup 6
- 0.11 + 1.13 MB in Inno Setup 5 Unicode
- 0.05 + 0.68 MB in Inno Setup 5 Ansi
From Inno Setup 6.0 revision history:
Delphi compiler updated from Delphi 2009 to Delphi 10.3 Rio. This change increases the size of Setup but decreases development, testing and deployment times.
This is also indirectly relevant:
Starting with Inno Setup 6 there's only one version available: Unicode Inno Setup.
来源：https://stackoverflow.com/questions/57175708/why-is-installer-compiled-in-inno-setup-6-one-mb-larger-than-in-inno-setup-5