char faster than int?

Scott M

I need to squeeze a few more drops of blood^H^H^H^H^H performance from my Javelins. Does anyone know if operations on char (unsigned 8 bit) are faster than operations on int (signed 16 bit) in this implementation? Most operations are stores and compares, but there is some adding and subtracting.

I can "try and see", but it means mucking a lot of code and I'm hoping someone knows definitively. Thanks.
·

Peter Verkaik

Write a simple test class to store and retrieve 20,000 elements

of an array. Do that for types byte, char, short and int and time

the operations. That should give you the answer.

I expect the byte/char to be slightly faster because only 1 byte

needs to stored/retrieved from the sram for each element.

regards peter