Comparing STM32 Speed I'm looking at the various entry level ARMs that ST Micro offers, like the F070, F103, L0-series ... etc. I see that clock speed is max 36MHz through 72MHz depending on series. Then I see Thumb and Cortex M0, M0+, M3 ... how do I know which is faster at basic stuff?  I don't want FPU or DSP, just a decent part that's a step up from my single cycle 48MHz micro I'm using now. All of these have variants with the memory and peripherals I need.