Backout changesets 37f9a5424227, c1578a4fc86d and a417424f9213 (for bugs 933354, 929021 and 923193 respectively) while we figure out performance regressions,a=bajaj
Backout changesets 238b3c81f42c and rest of a417424f9213 (bug 928798 and rest of bug 923193 respectively),a=bajaj