diff --git a/cache_benchmark/cache.c b/cache_benchmark/cache.c
index 0e41a27..dc59865 100644
--- a/cache_benchmark/cache.c
+++ b/cache_benchmark/cache.c
@@ -53,6 +53,7 @@ int main(int argc, char* argv[]) {
 	per_instruct_ticks = per_instruct_ticks - rc;
 	printf("%u, %u, %lf, %lf\n", n_bytes, array_size, clocks_to_ns(per_instruct_ticks), clocks_to_ns(rc));
 	int_to_dev_null(tmp);
+	//free not necessary
 }
 double clocks_to_ns(double ct) {
 	return ct / CLOCKS_PER_SEC * 1000000000.0;
@@ -101,7 +102,7 @@ double clock_ticks_rand() {
 	for(size_t i=0; i<N; ++i) {
 		rand();
 	}
-	double time_per_rand = (double)(clock() - start) / N;
-	return time_per_rand;
+	double clock_ticks_per_rand = (double)(clock() - start) / N;
+	return clock_ticks_per_rand;
 #undef N
 }