I doubt knowing such an old build can play SMG on LLE audio fullspeed will help the devs. Newer builds focus on accuracy, so speed is often sacrificed. Performance enhancements are occasionally made (new-ax-hle elliminated the need for LLE audio in a number of games, GLSL-master has some nice speed boosts for OpenGL) but those often get outnumbered by changes that make Dolphin more demanding.
It's not like changes were made since r7719 and we have no clue why Dolphin's slower now. Dolphin 3.0 could probably play SMG 1 & 2 fullspeed on LLE audio with a stock i5-3570K turbo boosting. My stock i5-2500K comes pretty close to doing it, mind you.
It's not like changes were made since r7719 and we have no clue why Dolphin's slower now. Dolphin 3.0 could probably play SMG 1 & 2 fullspeed on LLE audio with a stock i5-3570K turbo boosting. My stock i5-2500K comes pretty close to doing it, mind you.