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/bench_sum.cpp b/bench/bench_sum.cpp
new file mode 100644
index 0000000..a3d925e
--- /dev/null
+++ b/bench/bench_sum.cpp
@@ -0,0 +1,18 @@
+#include <iostream>
+#include <Eigen/Core>
+using namespace Eigen;
+using namespace std;
+
+int main()
+{
+ typedef Matrix<SCALAR,Eigen::Dynamic,1> Vec;
+ Vec v(SIZE);
+ v.setZero();
+ v[0] = 1;
+ v[1] = 2;
+ for(int i = 0; i < 1000000; i++)
+ {
+ v.coeffRef(0) += v.sum() * SCALAR(1e-20);
+ }
+ cout << v.sum() << endl;
+}