I noticed that in TComRdCost.cpp, all the functions for SAD,SSE,HAD where bRound is being passed as parameter, xClip() is being used which affects the encoding time. xClip() is redundant step.
(255+255+0)>>1 = 255 and (255+255+1)>>1 = 255.

So xClip should be removed from all these functions.

For e.g.
So in TMuC0.7.2, in TComRdCost.cpp, line 471 can be changed
from
pred = xClip( (piCur[n] + piRef[n] + bRound) >> 1 );
to
pred = (piCur[n] + piRef[n] + bRound) >> 1 ;

Results should still be bitexact.