In Delphi 1.0, sometimes checking the Optimize for size and load time checkbox, in Options/Project/Linker doesn't work (you get a Disk full message, even with plenty of space).
Delphi 1.0 comes with a Dos program, W8LOSS, that does the same. To use, it you must type:
W8LOSS program.exe
It will shrink your executable in about 20%, and will speed up loading time.