Squashed 'third_party/eigen/' content from commit 61d72f6
Change-Id: Iccc90fa0b55ab44037f018046d2fcffd90d9d025
git-subtree-dir: third_party/eigen
git-subtree-split: 61d72f6383cfa842868c53e30e087b0258177257
diff --git a/bench/benchmark.cpp b/bench/benchmark.cpp
new file mode 100644
index 0000000..c721b90
--- /dev/null
+++ b/bench/benchmark.cpp
@@ -0,0 +1,39 @@
+// g++ -O3 -DNDEBUG -DMATSIZE=<x> benchmark.cpp -o benchmark && time ./benchmark
+
+#include <iostream>
+
+#include <Eigen/Core>
+
+#ifndef MATSIZE
+#define MATSIZE 3
+#endif
+
+using namespace std;
+using namespace Eigen;
+
+#ifndef REPEAT
+#define REPEAT 40000000
+#endif
+
+#ifndef SCALAR
+#define SCALAR double
+#endif
+
+int main(int argc, char *argv[])
+{
+ Matrix<SCALAR,MATSIZE,MATSIZE> I = Matrix<SCALAR,MATSIZE,MATSIZE>::Ones();
+ Matrix<SCALAR,MATSIZE,MATSIZE> m;
+ for(int i = 0; i < MATSIZE; i++)
+ for(int j = 0; j < MATSIZE; j++)
+ {
+ m(i,j) = (i+MATSIZE*j);
+ }
+ asm("#begin");
+ for(int a = 0; a < REPEAT; a++)
+ {
+ m = Matrix<SCALAR,MATSIZE,MATSIZE>::Ones() + 0.00005 * (m + (m*m));
+ }
+ asm("#end");
+ cout << m << endl;
+ return 0;
+}