Previous studies show that intrachannel nonlinear effects are the dominate factor which limits the performance of high-speed long-haul quasi-linear dispersion compensated fiber-optic transmission systems. In this paper, we compare the performance of different chromatic dispersion compensation schemes like pre-, post-, and symmetrical-dispersion compensations in detail by numerically solving the coupled nonlinear Schr dinger equations in the presence of intrachannel four-wave mixing (IFWM) in quasi-linear transmission systems. It is found that IFWM is the dominant limiting factor for a typical dispersion compensated quasi-linear transmission system. For a fixed Er-doped optical fiber amplifier spacing, optimal compensation scheme depends on transmission bit rate. As bit rate increases, the performance of pre-compensation becomes better and better. On the contrary, post-compensation exhibits its advantage more and more as bit rate decreases.