Add threading_performance_report.md

bench_volatile_loop.cpp

@@ -0,0 +1,10 @@
+#include <nanobench.h>
+
+int main() {
+  ankerl::nanobench::Bench().run("volatile loop to 500", [&] {
+    for (volatile int i = 0; i < 800; i = i + 1)
+      ;
+  });
+
+  return 0;
+}