Circuit Eval speed training

26/26 Circuit Eval simulations correct; first PB 6.041s→3.653s. Faster: confirm fixed shell, compute g3 via short-circuit ((A&B) op (C≠D)); g4=!g3; skip g5 and derive g6: B=0→A|g4, B=1→g3&!A; emit requested order, no second pass. Slower runs evaluated all gates. Bottleneck: connector/runtime variance.