Hello Cees,
Citate from http://www.jrsoftware.org/striprlc.php :
Why not use an EXE compressor?
Some have asked why I made StripReloc when there are EXE compression
programs such as ASPack and UPX that will trim more bytes off of
executables than StripReloc ever could.
The reason is there are downsides to using EXE compressors. Most notably:
- Upon startup of a compressed EXE/DLL, all of the code is
decompressed from the disk image into memory in one pass, which can
cause disk thrashing if the system is low on memory and is forced to
access the swap file. In contrast, with uncompressed EXE/DLLs, the OS
allocates memory for code pages on demand (i.e. when they are
executed).
- Multiple instances of a compressed EXE/DLL create multiple instances
of the code in memory. If you have a compressed EXE that contains 1 MB
of code (before compression) and the user starts 5 instances of it,
approximately 4 MB of memory is wasted. Likewise, if you have a DLL
that is 1 MB and it is used by 5 running applications, approximately 4
MB of memory is wasted. With uncompressed EXE/DLLs, code is only
stored in memory once and is shared between instances.
- Some older virus scanners flag compressed EXE/DLLs as being
virus-infected. (This is this reason I stopped compressing Inno
Setup's EXEs.)
--
9Val
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