fixup: add ns bench

Author: not-matthias

examples/google_benchmark_cmake/sleep_bench.hpp

@@ -12,6 +12,34 @@ static inline void busy_sleep_for(std::chrono::nanoseconds duration) {
   }
 }
 
+static void BM_sleep_1ns(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::nanoseconds(1));
+  }
+}
+BENCHMARK(BM_sleep_1ns);
+
+static void BM_sleep_10ns(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::nanoseconds(10));
+  }
+}
+BENCHMARK(BM_sleep_10ns);
+
+static void BM_sleep_50ns(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::nanoseconds(50));
+  }
+}
+BENCHMARK(BM_sleep_50ns);
+
+static void BM_sleep_100ns(benchmark::State& state) {
+  for (auto _ : state) {
+    busy_sleep_for(std::chrono::nanoseconds(100));
+  }
+}
+BENCHMARK(BM_sleep_100ns);
+
 static void BM_sleep_1us(benchmark::State& state) {
   for (auto _ : state) {
     busy_sleep_for(std::chrono::microseconds(1));