1 files changed, 9 insertions, 0 deletions
diff --git a/bench/nanobench.cpp b/bench/nanobench.cpp
index d784439bb4..04583309ce 100644
--- a/bench/nanobench.cpp
+++ b/bench/nanobench.cpp
@@ -1284,6 +1284,15 @@ int main(int argc, char** argv) {
                 ? setup_gpu_bench(target, bench.get(), maxFrameLag)
                 : setup_cpu_bench(overhead, target, bench.get());
 
+            if (runs == 0 && FLAGS_ms < 1000) {
+                // Run the first bench for 1000ms to warm up the nanobench if FLAGS_ms < 1000.
+                // Otherwise, the first few benches' measurements will be inaccurate.
+                auto stop = now_ms() + 1000;
+                do {
+                    time(loops, bench.get(), target);
+                } while (now_ms() < stop);
+            }
+
             if (FLAGS_ms) {
                 samples.reset();
                 auto stop = now_ms() + FLAGS_ms;