A local timestamp. You can subtract two timestamps to get the number of elapsed
microseconds. This is guaranteed to increase over time during the lifetime
of a process, but not globally across runs. You don't need to worry about
the value wrapping around. Note that the underlying clock might not actually have
microsecond resolution.
A local timestamp. You can subtract two timestamps to get the number of elapsed microseconds. This is guaranteed to increase over time during the lifetime of a process, but not globally across runs. You don't need to worry about the value wrapping around. Note that the underlying clock might not actually have microsecond resolution.