规范模块目录和第三方依赖结构

third_party/eigen3/bench/benchmarkXcwise.cpp

@@ -0,0 +1,35 @@
+// g++ -O3 -DNDEBUG benchmarkX.cpp -o benchmarkX && time ./benchmarkX
+
+#include <iostream>
+#include <Eigen/Core>
+
+using namespace std;
+using namespace Eigen;
+
+#ifndef VECTYPE
+#define VECTYPE VectorXLd
+#endif
+
+#ifndef VECSIZE
+#define VECSIZE 1000000
+#endif
+
+#ifndef REPEAT
+#define REPEAT 1000
+#endif
+
+int main(int argc, char *argv[])
+{
+	VECTYPE I = VECTYPE::Ones(VECSIZE);
+	VECTYPE m(VECSIZE,1);
+	for(int i = 0; i < VECSIZE; i++)
+	{
+		m[i] = 0.1 * i/VECSIZE;
+	}
+	for(int a = 0; a < REPEAT; a++)
+	{
+		m = VECTYPE::Ones(VECSIZE) + 0.00005 * (m.cwise().square() + m/4);
+	}
+	cout << m[0] << endl;
+	return 0;
+}