How to Measure Execution Time in C with time(), clock() and gettimeofday()

This guide shows how to benchmark C code by measuring elapsed time using the standard time() function for second‑level precision, clock() for higher CPU‑time accuracy, and gettimeofday() for microsecond‑level resolution, including complete example programs and key considerations.

BenchmarkingCclock

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How to Measure Execution Time in C with time(), clock() and gettimeofday()

Open Source Linux

Dec 12, 2024 · Fundamentals

Measure Execution Time in C: time(), clock() and gettimeofday()

This guide demonstrates how to use the C standard library functions time(), clock(), and the POSIX gettimeofday() to measure code execution duration, comparing their precision levels and showing sample code snippets that illustrate typical usage and output.

Cclockgettimeofday

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