HP 3000 Manuals HP 3000 Manuals
Optimizing Performance
To optimize performance of HP Business BASIC/XL applications:
* Avoid short integer type.
The natural word length in HP Business BASIC/260 programs is 16 bits.
The natural word length in HP Business BASIC/XL programs is 32 bits.
Performance of short integer type on MPE XL is slow compared to
integer type because short integer type usually has to be changed to
integer type to do the arithmetic operation and then the result is
changed back from integer to short integer. Avoid using short
integer type as much as possible to maximize performance.
Example:
10 SHORT INTEGER A,B,C
20 A = B + C
In this example, B and C are changed to integer values, then the two
integer values are added together. The result, A, is changed back to
short integer type.
You will not always be able to avoid short integer type for
parameters to external routines, intrinsic routines, or database
access. For instance, the status array for TurboIMAGE database
access is short integer type.
* Use compiler options.
Compiler options can significantly reduce the amount of code space
produced during compilation. The following compiler options are code
and performance options:
* ERROR
* HALT
* OPTIMIZE
Refer to the HP Business BASIC/XL Reference Manual for detailed
information about using compiler options.