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Hi, Norris! Currently ScriptableObject.put does not check lastAccess cache during its search for slots. When I added this check (see the attached patch) it speeded up the benchmark suite by about 1.5% and in particular for setProp_bench.js the win was about 8%. I think that even on multiprocessor machines it would not introduces any additional issues like accessing the old value in the processor cache because the put method accesses existing properties via unsynchronized getSlot, and the check for lastAccess is on pair with that. Trgards, Igor
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