The struggle is real! Compiling with debug enabled does change timing enough to hide (or surface!) race conditions. The best way I've found to deal with this

The struggle is real! Compiling with debug enabled does change timing enough to hide (or surface!) race conditions. The best way I've found to deal with this is: 1. Compile with -O2 (or for firmware, -Os) by default, and generate debug symbols in the elf file. Crank it up to -O3 only on a file-by-file basis with #pragma 2. Collect the process memory when an issue is hit 3. Debug it asynchronously using the debug symbols + the memory. That way, the debugging & the running are decoupled and the timing is stable.