clear
EN Clears all cache entries using AtomicLongArray.lazySet / AtomicIntegerArray.lazySet with 4× manual loop unrolling. This avoids issuing a full memory barrier on every element, which is safe because the next getOrPut will provide the required acquire/release semantics. Thread-safe.
PT Limpa todas as entradas com lazySet (sem barrier completo por elemento) e unrolling 4× para otimização de pipeline. Thread-safe.