terminal

λ spike/parallel ∴ g++ --version
g++ (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

λ spike/parallel ∴ g++ test_bench.cpp -std=c++11 -O3 -Wall -Werror -lbenchmark -lpthread
λ spike/parallel ∴ ./a.out
Run on (4 X 3700 MHz CPU s)
2017-05-16 21:42:29
Benchmark                  Time           CPU Iterations
--------------------------------------------------------
BM_TimeDiffTOD            18 ns         18 ns   39517679
BM_TimeDiffChrono         19 ns         19 ns   35092984

test_bench.cpp

#include <benchmark/benchmark.h>
#include <chrono>
#include <sys/time.h>

static void BM_TimeDiffChrono(benchmark::State& state) {
    while (state.KeepRunning()){
        benchmark::DoNotOptimize(std::chrono::high_resolution_clock::now());
    }
}
static void BM_TimeDiffTOD(benchmark::State& state) {
    while (state.KeepRunning()){
        struct timeval tval;
        benchmark::DoNotOptimize(gettimeofday(&tval, NULL));
    }
}

BENCHMARK(BM_TimeDiffTOD);
BENCHMARK(BM_TimeDiffChrono);
BENCHMARK_MAIN();