Brython 3.8.9 performance compared to CPython 3.8.0

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Test Brython (100 = CPython) Code
simple assignment66 
  1. for i in range(1000000):
  2.     a = 1
augmented assignment77 
  1. a = 0
  2. for i in range(1000000):
  3.     a += 1
simple assignment to float184 
  1. for i in range(1000000):
  2.     a = 1.0
big integers3659 
  1. for i in range(100):
  2.     2  60
build dictionary318 
  1. for i in range(1000000):
  2.     a = {0: 0}
build dictionary 2143 
  1. d = {}
  2. for i in range(100000):
  3.     d[i] = i
set dictionary item132 
  1. a = {0: 0}
  2. for i in range(1000000):
  3.     a[0] = i
build set625 
  1. for i in range(1000000):
  2.     a = {0, 2.7, "x"}
build list71 
  1. for i in range(1000000):
  2.     a = [1, 2, 3]
set list item98 
  1. a = [0]
  2. for i in range(1000000):
  3.     a[0] = i
integer addition196 
  1. a, b, c = 1, 2, 3
  2. for i in range(1000000):
  3.     a + b + c
string addition142 
  1. a, b, c = 'a', 'b', 'c'
  2. for i in range(1000000):
  3.     a + b + c
cast int to string127 
  1. for i in range(100000):
  2.     str(i)
create function without arguments446 
  1. for i in range(1000000):
  2.     def f():
  3.         pass
create function, single positional argument464 
  1. for i in range(1000000):
  2.     def f(x):
  3.         pass
create function, complex arguments655 
  1. for i in range(1000000):
  2.     def f(x, y=1, *args, kw):
  3.         pass
function call804 
  1. def f(x):
  2.     return x
  3. for i in range(1000000):
  4.     f(i)
function call, complex arguments1234 
  1. def f(x, y=0, args, *kw):
  2.     return x
  3. for i in range(100000):
  4.     f(i, 5, 6, a=8)
create simple class498 
  1. for i in range(10000):
  2.     class A:
  3.         pass
create class with init572 
  1. for i in range(10000):
  2.     class A:
  3.         def init(self, x):
  4.             self.x = x
create instance of simple class241 
  1. class A:
  2.     pass
  3.  
  4. for i in range(1000000):
  5.     A()
create instance of class with init1123 
  1. class A:
  2.     def init(self, x):
  3.         self.x = x
  4.  
  5. for i in range(100000):
  6.     A(i)
call instance method2551 
  1. class A:
  2.     def init(self, x):
  3.         self.x = x
  4.  
  5.     def f(self):
  6.         return self.x
  7.  
  8. a = A(1)
  9. for i in range(100000):
  10.     a.f()