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better worded the last sentence
Some emulator frontends like [[RetroArch]] or [[GroovyMAME]] have the option to delay the processing of emulation for a few milliseconds until right before a vsync occurs, which causes inputs to be polled quickly before your display refreshes instead at the beginning of the 16.7ms (for 60 fps) vsync period. The amount of time you can use frame delay without dropping frames is dependent on the performance of the emulator on your machine. Predictive waiting may also be forced with any DirectX based program through GeDoSaTo<ref>http://blog.metaclassofnil.com/?p=715</ref>.
Realistically, this is the last thing to configure, after all, other sync and buffer settings have been configured for your system's performance. It is only useful possible on systems with significantly more power performance much higher than is required to run at full speed.
==References==
