DEFINE_BOOL(trace_weak_arrays, false, "trace WeakFixedArray usage")
DEFINE_BOOL(track_prototype_users, false,
"keep track of which maps refer to a given prototype object")
-DEFINE_BOOL(eliminate_prototype_chain_checks, false,
+DEFINE_BOOL(eliminate_prototype_chain_checks, true,
"collapse prototype chain checks into single-cell checks")
DEFINE_IMPLICATION(eliminate_prototype_chain_checks, track_prototype_users)
DEFINE_BOOL(use_verbose_printer, true, "allows verbose printing")