Linux - Java collections. Part 4 (Java vs Java)

Map<Integer, Integer> t = new HashMap <Integer, Integer> ();

VS

ConcurrentHashMap<Integer, Integer> t = new ConcurrentHashMap<Integer, Integer> ();

	HashMap	ConcurrentHashMap
Fill. Memory (bytes)	68,420,720	67,736,912
	6,470,968	7,773,352
	-2,084,584	70,738,584
	68,704,136	65,310,584
	2,410,384	79,292,264
Fill. Time (ms)	432	1319
	505	764
	567	686
	391	743
	700	445
Read. Memory (bytes)	16,075,936	16,456,960
	-5,918,720	16,456,960
	16,112,320	-32,882,720
	-17,821,488	16,917,760
	16,008,720	14,803,040
Read. Time (ms)	48	149
	63	143
	29	374
	66	158
	28	170