..there are some Cortex M3 benchmarks in http://arduino.cc/forum/index.php/topic,121568.75.html
try to run it on an 8bitter, compare clock to clock ad you will see.. as a rule 64bit fp calcs are 2x slower than 32bit fp calcs in general..
..there are some Cortex M3 benchmarks in http://arduino.cc/forum/index.php/topic,121568.75.html
try to run it on an 8bitter, compare clock to clock ad you will see.. as a rule 64bit fp calcs are 2x slower than 32bit fp calcs in general..