Antoine, In response to "You should provide a detailed technical of your solution." The automatically created ctypes wrapper is one of the keys of the project. Blog entries 1 & 2 are a very detailed and technical discussion of the ctypes wrapper. If you go to Speed Metrics and read over the first entry -- Complex Calc -- you will find the Python source code as well as the assembly language output (Download pdf of Complex_Calc_asm). So you have the Python source. You have the 575 lines of NASM (assmbly language code). In addition, blog entries 3-5 discuss optimization in detail, and precisely how Complex_Calc was speeded up 63 times faster than Python. It is quite detailed and technical! Also, all of the other metrics have the Python source code. Mark