A method for ahead of time (AoT) compiling during a play of a legacy game is provided. The method includes scanning a memory device for an executable code of the legacy game, decoding the executable code, and translating the executable code into a first source code. The method further includes compiling the first source code to output a first compiled code, determining whether a user input during the play of the legacy game is received, and determining whether a fiber for servicing the user input is created. The fiber provides directionality of execution between the first compiled code and a second compiled code. The method includes executing the fiber in response to determining that the fiber for servicing the user input is created. The fiber is executed to generate one or more image frames of the legacy game.