https://wccftech.com/rpcs3-ps3-performance-gow3-rdr-mgs4/

PC PS3 Emulator RPCS3 performance has been improved for several PS3 titles, including God of War 3, Red Dead Redemption and Metal Gear Solid 4.

Last month, contributor KD-11 rewrote the emulator’s ZCull implementation to improve scheduling efficiency and this has resulted in improved performance across numerous PS3 titles. KD-11 also introduced a new ‘sync’ setting, and while this particular setting shouldn’t be used for most titles as it results in lower performance, a limited number of games do run better with the setting enabled.