renamed Tactic.taglist/untaglist/orderlist to tag_list/untag_list/order_list (in library.ML);

goal_tac: finish marked assumptions from left to right -- corresponds better with the strategy of etac, with significant performance gains in some situations;

eq_assumption: slightly more efficient by checking (open) result of Logic.assum_problems directly; tuned;

tuned aeconv: test plain aconv before expensive eta_contract;

substantial speedup of assumption and elim-resolution: Logic.assum_problems refrains from eager application of parameters, discriminate via Term.could_unify before invoking full unification (assumes terms in beta-normal form, as do higher term net operations anyway);

refined is_norm_hhf: reject beta-redexes (rules based on term nets or could_unify assume normal form), also potentially faster by avoiding expensive Envir.beta_eta_contract;

provide Simplifier.norm_hhf(_protect) as regular simplifier operation;

method parser: pass proper context;

merged

simplified method setup;