MSPM0L1305-Q1: Optimization level recommended by ccs

Hello Owens, 

Thank you for contacting us. Moreover, different levels of optimization, as you may already know, results in different types of optimizations to your code during compilation. For the recommendations, the -Oz is recommended for optimizing code size while the -O3 is recommended for optimizing performance but can increase compiler generated code size. For more information on the details of the optimization levels, kindly refer to the link below: 

Optimization Options: https://software-dl.ti.com/codegen/docs/tiarmclang/rel2_1_0_LTS/compiler_manual/using_compiler/compiler_options/optimization_options.html#cm-optimization-levels

Regards, Jojo