By default, the same optimization level for an entire project or file is used, but you
should consider using different optimization settings for different files in a project. For
example, put code that must execute very quickly into a separate file and compile it for
minimal execution time (maximum speed), and the rest of the code for minimal code
size. This will give a small program, which is still fast enough where it matters. The
“#pragma optimize directive ”allows you to fine-tune the optimization for specific
functions, such as time-critical functions.
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