timing_test: Warn if elapsed time is zero

1 files changed, 2 insertions, 0 deletions

diff --git a/timing_test.cc b/timing_test.cc
index deee26b..1d30dee 100644
--- a/timing_test.cc
+++ b/timing_test.cc
@@ -166,5 +166,7 @@ int main(int argc, char **argv)
 	printf("%ld loops in %.5fs = %.2f nsec / loop\n",
 	       (long)loops, float(duration) * 1e-9,
 	       float(duration) / loops);
+	if (duration == 0)
+		printf("[WARN]\tThe apparent elapsed time was exactly 0.  You have precision issues.\n");
 	return 0;
 }