diff --git a/bench/cec2020/benchFunctions.go b/bench/cec2020/benchFunctions.go
new file mode 100644
index 0000000..b5cf890
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+++ b/bench/cec2020/benchFunctions.go
@@ -0,0 +1,30 @@
+// Copyright 2023 wanderer <a_mirre at utb dot cz>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package cec2020
+
+// void sphere_func (double *, double *, int , double *,double *, int, int); // Sphere
+// void ellips_func(double *, double *, int , double *,double *, int, int); // Ellipsoidal
+// void bent_cigar_func(double *, double *, int , double *,double *, int, int); // Discus
+// void discus_func(double *, double *, int , double *,double *, int, int);  // Bent_Cigar
+// void dif_powers_func(double *, double *, int , double *,double *, int, int);  // Different Powers
+// void rosenbrock_func (double *, double *, int , double *,double *, int, int); // Rosenbrock's
+// void schaffer_F7_func (double *, double *, int , double *,double *, int, int); // Schwefel's F7
+// void ackley_func (double *, double *, int , double *,double *, int, int); // Ackley's
+// void rastrigin_func (double *, double *, int , double *,double *, int, int); // Rastrigin's
+// void weierstrass_func (double *, double *, int , double *,double *, int, int); // Weierstrass's
+// void griewank_func (double *, double *, int , double *,double *, int, int); // Griewank's
+// void schwefel_func (double *, double *, int , double *,double *, int, int); // Schwefel's
+// void katsuura_func (double *, double *, int , double *,double *, int, int); // Katsuura
+// void bi_rastrigin_func (double *, double *, int , double *,double *, int, int); // Lunacek Bi_rastrigin
+// void grie_rosen_func (double *, double *, int , double *,double *, int, int); // Griewank-Rosenbrock
+// void escaffer6_func (double *, double *, int , double *,double *, int, int); // Expanded Schaffer's F6
+// void step_rastrigin_func (double *, double *, int , double *,double *, int, int); // Noncontinuous Rastrigin's
+// void happycat_func (double *, double *, int , double *,double *, int, int); // HappyCat
+// void hgbat_func (double *, double *, int , double *,double *, int, int); // HGBat
+//
+// // New functions Noor Changes
+// void sum_diff_pow_func(double *, double *, int , double *,double *, int, int); // Sum of different power
+// void zakharov_func(double *, double *, int , double *,double *, int, int); // ZAKHAROV
+// void levy_func(double *, double *, int , double *,double *, int, int); // Levy
+// void dixon_price_func(double *, double *, int , double *,double *, int, int); // Dixon and Price
diff --git a/bench/cec2020/contants.go b/bench/cec2020/contants.go
new file mode 100644
index 0000000..fc16dd2
--- /dev/null
+++ b/bench/cec2020/contants.go
@@ -0,0 +1,11 @@
+// Copyright 2023 wanderer <a_mirre at utb dot cz>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package cec2020
+
+/*
+#define INF 1.0e99
+#define EPS 1.0e-14
+#define E  2.7182818284590452353602874713526625
+#define PI 3.1415926535897932384626433832795029
+*/
diff --git a/bench/cec2020/helperFunctions.go b/bench/cec2020/helperFunctions.go
new file mode 100644
index 0000000..2534b86
--- /dev/null
+++ b/bench/cec2020/helperFunctions.go
@@ -0,0 +1,33 @@
+// Copyright 2023 wanderer <a_mirre at utb dot cz>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package cec2020
+
+// void hf01 (double *, double *, int, double *,double *, int *,int, int); // Hybrid Function 1
+// void hf02 (double *, double *, int, double *,double *, int *,int, int); // Hybrid Function 2
+// void hf03 (double *, double *, int, double *,double *, int *,int, int); // Hybrid Function 3
+// void hf04 (double *, double *, int, double *,double *, int *,int, int); // Hybrid Function 4
+// void hf05 (double *, double *, int, double *,double *, int *,int, int); // Hybrid Function 5
+// void hf06 (double *, double *, int, double *,double *, int *,int, int); // Hybrid Function 6
+// void hf07 (double *, double *, int, double *,double *, int *,int, int); // Hybrid Function 7
+// void hf08 (double *, double *, int, double *,double *, int *,int, int); // Hybrid Function 8
+// void hf09 (double *, double *, int, double *,double *, int *,int, int); // Hybrid Function 9
+// void hf10 (double *, double *, int, double *,double *, int *,int, int); // Hybrid Function 10
+//
+// void cf01 (double *, double *, int , double *,double *, int); // Composition Function 1
+// void cf02 (double *, double *, int , double *,double *, int); // Composition Function 2
+// void cf03 (double *, double *, int , double *,double *, int); // Composition Function 3
+// void cf04 (double *, double *, int , double *,double *, int); // Composition Function 4
+// void cf05 (double *, double *, int , double *,double *, int); // Composition Function 5
+// void cf06 (double *, double *, int , double *,double *, int); // Composition Function 6
+// void cf07 (double *, double *, int , double *,double *, int); // Composition Function 7
+// void cf08 (double *, double *, int , double *,double *, int); // Composition Function 8
+// void cf09 (double *, double *, int , double *,double *, int *, int); // Composition Function 9/
+// void cf10 (double *, double *, int , double *,double *, int *, int); // Composition Function 10
+
+// void shiftfunc (double*,double*,int,double*);
+// void rotatefunc (double*,double*,int, double*);
+// void sr_func (double *, double *, int, double*, double*, double, int, int); // shift and rotate
+// void asyfunc (double *, double *x, int, double);
+// void oszfunc (double *, double *, int);
+// void cf_cal(double *, double *, int, double *,double *,double *,double *,int);
diff --git a/bench/cec2020/vars.go b/bench/cec2020/vars.go
new file mode 100644
index 0000000..1f3ef75
--- /dev/null
+++ b/bench/cec2020/vars.go
@@ -0,0 +1,9 @@
+// Copyright 2023 wanderer <a_mirre at utb dot cz>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package cec2020
+
+/*
+extern double *OShift,*M,*y,*z,*x_bound;
+extern int ini_flag,n_flag,func_flag,*SS;
+*/