An embedded system is comprised of ANSI C functions that do not execute in a short enough time for the embedded system to meet its real-time requirements.Which of the following techniques will increase the performance of the software if the processor speed and amount of data memory of the embedded system cannot be increased?

Declaring often used variables using the register keyword
Moving calculations which never change to outside loops
Decreasing the number of functions that call other functions
Consolidating functions into fewer, larger translation units
Precompiling header functions
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