Add rule to makefile time-gen and time.py file

Makefile

@@ -19,4 +19,7 @@ perf: binaries
 	cd tests/performance && python3 connectivity.py
 
 test-gen: fftma
-	cd tests/stages/generation && python3 -m unittest test.py
+	cd tests/stages/generation && python3 -m unittest test.py
+
+time-gen: fftma
+	cd tests/performance/generation && python3 time.py $(N)

tests/performance/generation/time.py

@@ -0,0 +1,56 @@
+import numpy as np
+#from tests.utils.gen_sample import generate
+
+import sys
+
+from FFTMA import gen
+import time
+
+def generate(N):
+    start_time = time.time()
+    nx, ny, nz = N,N,N
+    dx, dy, dz = 1.0, 1.0, 1.0
+    seed= 1548762 #rdi(10000,99999)
+    var=1
+    vario=2
+    alpha=1
+    lcx=2
+    lcy=4
+    lcz=16
+    ap1x=1
+    ap1y=0
+    ap1z=0
+    ap2x=0
+    ap2y=1
+    ap2z=0
+
+    v1 = (var, vario, alpha, lcx, lcy, lcz, ap1x, ap1y, ap1z, ap2x, ap2y, ap2z)
+    variograms = [v1]
+
+    mean=15.3245987
+    variance=3.5682389
+    typ=3
+
+    k = gen(nx, ny, nz, dx, dy, dz, seed, variograms, mean, variance, typ)
+
+    duration = time.time() - start_time
+    return k, duration
+
+N=int(sys.argv[1])
+SAMPLE_SIZE=100
+
+def time_measurement(n, sample_size):
+    sample = []
+
+    print(f"SAMPLE_SIZE = {SAMPLE_SIZE}")
+    for i in range(sample_size):
+        _, duration = generate(n)
+        print(i)
+        sample.append(duration)
+    
+    npsample = np.array(sample)
+
+    print(f"AVG: {np.mean(npsample)} seconds")
+    print(f"MEDIAN: {np.median(npsample)} seconds")
+
+time_measurement(N, SAMPLE_SIZE)