I have 7 different types of function call:
1. An inlined function, where the code author replaces the function call with a copy of the body of the function.
2. A function is defined in a separate MATLAB file. The arguments are passed by the calling function (file-pass).
3. A function is defined in a separate MATLAB file. The arguments are provided by referencing global variables; only indices are provided by the calling function (file-global).
4. A nested function. The arguments are passed by the enclosing function (nest-pass).
5. A nested function. The arguments are those shared with the enclosing function; only indices are provided by the enclosing function (nest-share).
6. A sub function. The arguments are passed by the calling function (sub-pass).
7. A sub function. The arguments are provided by referencing global variables; only indices are provided by the calling function (sub-global).
(For more information, please see the following three MATLAB files: testTop.m, testCompute, and testComputeGlobal.m)
I would like to know which function call provides better performance than the others in general.
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