Simple Examples for Timing C/C++ and Fortran Code Segments under Gnu Compilers

Numerous websites contain examples of how one might do code timing under C or Fortran. Few websites, however, provide all of the requisite pieces one might need to start timing code. In these examples we demonstrate how one can write a simple wrapper functions to utilize Unix system calls, place those functions in a library (named lbstime.a), and then use the functions from the library in both C/C++ and Fortran to time code segments. Two commented driver programs (one in C an one in Fortran) are provided to demonstrate how to call the library functions. A makefile is also provided to build all of the components.