C:\>csc test.cs
Microsoft (R) Visual C# 2005 Compiler version 8.00.50727.42
for Microsoft (R) Windows (R) 2005 Framework version 2.0.50727
Copyright (C) Microsoft Corporation 2001-2005. All rights reserved.

C:\>test.exe
1000000000 operations in 2 seconds

C:\>python test.py
1000000000 operations in 385 seconds

C:\>python test_psyco.py
1000000000 operations in 37 seconds