结构调整2

ExampleCodes/SpeedTest/fib.py

@@ -0,0 +1,11 @@
+from time import time as tt
+
+def fib(x:int) -> int:
+    if x <= 1:  return x;
+    return fib(x-1) + fib(x-2)
+
+if __name__ == '__main__':
+    t0 = tt()
+    result = fib(30)
+    t1 = tt()
+    print('cost: ',t1-t0, 'result:', result)