Hello:
I've tested the program on a i486DX2 with Linux, Win95, OS2 and 
finally on an PC-XT running MS-DOS 3.2.
The results are strange since long was faster than int on both
machines; remarkable is that Win95 & OS/2 run the program
with the same speed:

Linux 1.2.13 (486 DX2, 16MB, Compiled with gcc-2.7.0, "-O")
long: 1 seconds
int: 3 seconds
short: 5 seconds
char: 6 seconds
Start subroutine calls:
long: 7 seconds
int: 7 seconds
short: 7 seconds
char: 8 seconds

Compiled with gcc-2.7.0, "-O4"
tart simple copy:
long: 1 seconds
int: 2 seconds
short: 3 seconds
char: 4 seconds
Start subroutine calls:
long: 5 seconds
int: 5 seconds
short: 6 seconds
char: 6 seconds

Windows95; OS/2 (486 DX2, 16MB, Compiled with Turbo-C)
Start simple copy:
long: 8 seconds
int: 13 seconds
short: 19 seconds
char: 25 seconds
Start subroutine calls:
long: 26 seconds
int: 26 seconds
short: 27 seconds
char: 27 seconds

PC-XT (NEC V20 & 8087, 8 MHZ, Compiled with Turbo-C)
Start simple copy:
long: 530 seconds
int: 857 seconds
short: 1275 seconds
char: 1671 seconds
Start subroutine calls:
long: 1715 seconds
int: 1745 seconds
short: 1781 seconds
char: 1816 seconds

Cheers,
Angel Orille Franz