[benchmarks] DO_NOT_OPTIMIZE macro

1 files changed, 14 insertions, 2 deletions

diff --git a/source/test/unittests/foo.bench.c b/source/test/unittests/foo.bench.c
index 531f1d8..a3d5c18 100644
--- a/source/test/unittests/foo.bench.c
+++ b/source/test/unittests/foo.bench.c
@@ -1,11 +1,23 @@
 #define KIT_BENCH_FILE foo
 #include "../../kit_test/bench.h"
 
+struct test_foo_ {
+  double f;
+};
+
 BENCHMARK("foo") {
   BENCHMARK_BEGIN;
   {
-    volatile int x = 0;
-    for (int i = 0; i < 200000; i++) x++;
+    int              x = 0;
+    struct test_foo_ f = { 0. };
+
+    for (int i = 0; i < 100000; i++) {
+      x += (1 << 1);
+      x ^= i;
+      f.f += 0.1;
+    }
+    DO_NOT_OPTIMIZE(x);
+    DO_NOT_OPTIMIZE(f);
   }
   BENCHMARK_END;
 }