public void clear(){
  GridUnsafe.copyMemory(spineEmpty,INT_ARR_OFF,spine,INT_ARR_OFF,spineEmpty.length << 2);
  GridUnsafe.copyMemory(nextEmpty,INT_ARR_OFF,next,INT_ARR_OFF,nextEmpty.length << 2);
  Arrays.fill(objs,null);
  size=0;
}

public void clear ( ) { GridUnsafe . copyMemory ( spineEmpty , INT_ARR_OFF , spine , INT_ARR_OFF , spineEmpty . length << 2 ) ; GridUnsafe . copyMemory ( nextEmpty , INT_ARR_OFF , next , INT_ARR_OFF , nextEmpty . length << 2 ) ; Arrays . fill ( objs , null ) ; size = 0 ; }
resets table to its initial ( empty ) state .
