what changes to the source code of ARM Cortex-M3 can i make in order to shorten execution time?

here are the 3 codes i need to change to shorten execution time. any help will be greatly appreciated.
Reduce TCO with Arm Based SmartNICs

What is a SmartNIC A SmartNIC is a Network Interface Card that includes general-purpose CPUs. The CPUs are used to offload processing that is done by server CPUs. Arm CPUs are being selected for SmartNIC...
How to measure program execution time in ARM Cortex-A53 processor?

Hi, I was using following method to read clock in cortex-a15: static void readticks(unsigned int *result) { struct timeval t; unsigned int cc; if (!enabled...
Reduce ARM CM0+ scatter initialization during boot?

We are using ARM CM0+ in our embedded SoC design and I noticed that boot takes a long time. Specifically, I saw that it took ~18K cycles after the unreset before we executed an instruction that I recognize...
Guidelines on reducing Cache Miss rate

Hi Experts, Is there any document on general software guidelines in reducing the cache miss rate in the system for ARMV7 architectures ? If it is more specific to A/R/M then its great..