Author: Lucian-Ioan Popescu (SRIC 1)

State-of-the-art compilers use Undefined Behavior (UB) to trigger various optimizations. Their effects range from different code size or code speed to different power consumption levels. All those aspects are critical for IoT application with limited resources. In this work we will uncover the impact of UB optimization on IoT devices using Nuttx, a popular real-time operating system for IoT devices, Coremark, a benchmark that measures the performance of micro-controllers, and Clang, the compiler we will use for compiling Nuttx and Coremark.