java.util.concurrent.ConcurrentHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 18,075 objects	18,075	1,156,800	>= 20,192,568
<= 0.20 First 10 of 600 objects	600	38,400	>= 13,432,376
<= 0.40 First 10 of 1,295 objects	1,295	82,880	>= 65,603,808
<= 0.60 First 10 of 29 objects	29	1,856	>= 46,872
<= 1.00	1	64	1,176
Total: 5 entries	20,000	1,280,000

java.util.HashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 17,293 objects	17,293	830,064	>= 2,197,952
<= 0.20 First 10 of 1,107 objects	1,107	53,136	>= 1,006,624
<= 0.40 First 10 of 1,552 objects	1,552	74,496	>= 4,857,280
<= 0.60 First 10 of 48 objects	48	2,304	>= 98,168
Total: 4 entries	20,000	960,000

java.lang.ThreadLocal$ThreadLocalMap

java.util.LinkedHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 16,274 objects	16,274	911,344	>= 2,171,536
<= 0.20 First 10 of 141 objects	141	7,896	>= 136,080
<= 0.40 First 10 of 519 objects	519	29,064	>= 1,260,280
<= 0.60 First 10 of 282 objects	282	15,792	>= 89,448
<= 0.80 First 10 of 138 objects	138	7,728	>= 28,704
Total: 5 entries	17,354	971,824

java.util.HashSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 8,132 objects	8,132	130,112	>= 1,300,976
<= 0.20 First 10 of 266 objects	266	4,256	>= 220,744
<= 0.40 First 10 of 482 objects	482	7,712	>= 594,232
<= 0.60 First 10 of 20 objects	20	320	>= 6,712
Total: 4 entries	8,900	142,400

java.util.Properties

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 77 objects	77	4,312	>= 28,024
<= 0.20	1	56	1,264
<= 0.40 First 10 of 49 objects	49	2,744	>= 1,780,896
Total: 3 entries	127	7,112

java.util.Hashtable

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 2,496 objects	2,496	119,808	>= 308,048
<= 0.20 First 10 of 87 objects	87	4,176	>= 891,416
<= 0.40 First 10 of 55 objects	55	2,640	>= 272,104
<= 0.60 First 10 of 11 objects	11	528	>= 32,608
<= 0.80 All 2 objects	2	96	>= 1,824
Total: 5 entries	2,651	127,248

java.util.LinkedHashSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 3,621 objects	3,621	57,936	>= 605,576
<= 0.20 First 10 of 61 objects	61	976	>= 56,328
<= 0.40 First 10 of 153 objects	153	2,448	>= 126,328
<= 0.60 First 10 of 59 objects	59	944	>= 15,176
Total: 4 entries	3,894	62,304

java.util.Collections$SetFromMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 256 objects	256	6,144	>= 69,672
<= 0.20 First 10 of 151 objects	151	3,624	>= 182,400
<= 0.40 First 10 of 338 objects	338	8,112	>= 185,952
Total: 3 entries	745	17,880

java.util.Collections$UnmodifiableMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 897 objects	897	28,704	>= 62,584
<= 0.20 First 10 of 17 objects	17	544	>= 27,440
<= 0.40 First 10 of 28 objects	28	896	>= 247,328
<= 0.60 All 7 objects	7	224	>= 2,776
Total: 4 entries	949	30,368

java.util.Collections$UnmodifiableSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 1,282 objects	1,282	20,512	>= 247,960
<= 0.40 First 10 of 70 objects	70	1,120	>= 54,128
<= 0.60 All 9 objects	9	144	>= 2,896
Total: 3 entries	1,361	21,776

java.util.jar.Attributes

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 34 objects	34	544	>= 25,304
<= 0.20 All 10 objects	10	160	>= 8,800
<= 0.40 First 10 of 60 objects	60	960	>= 160,304
Total: 3 entries	104	1,664

java.util.WeakHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 191 objects	191	9,168	>= 83,760
<= 0.20 First 10 of 34 objects	34	1,632	>= 33,888
<= 0.40 All 2 objects	2	96	>= 2,768
Total: 3 entries	227	10,896

java.util.Collections$SynchronizedMap

java.util.RegularEnumSet

java.util.LinkedHashMap$LinkedKeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 3,978 objects	3,978	63,648	>= 63,984
<= 0.20 First 10 of 16 objects	16	256	>= 256
<= 0.40 First 10 of 50 objects	50	800	>= 800
<= 0.60 First 10 of 98 objects	98	1,568	>= 1,568
Total: 4 entries	4,142	66,272

java.util.HashMap$KeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 1,711 objects	1,711	27,376	>= 27,376
<= 0.20 First 10 of 280 objects	280	4,480	>= 4,480
<= 0.40 First 10 of 240 objects	240	3,840	>= 3,840
<= 0.60 All 9 objects	9	144	>= 144
Total: 4 entries	2,240	35,840

java.util.concurrent.ConcurrentHashMap$KeySetView

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 253 objects	253	6,072	>= 6,344
<= 0.20 First 10 of 151 objects	151	3,624	>= 3,624
<= 0.40 First 10 of 374 objects	374	8,976	>= 8,976
Total: 3 entries	778	18,672

java.util.LinkedHashMap$LinkedEntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 503 objects	503	8,048	>= 8,048
<= 0.20 First 10 of 16 objects	16	256	>= 256
<= 0.40 All 9 objects	9	144	>= 144
<= 0.60 First 10 of 94 objects	94	1,504	>= 1,504
Total: 4 entries	622	9,952

java.util.concurrent.ConcurrentHashMap$EntrySetView

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 67 objects	67	1,072	>= 1,072
<= 0.20 First 10 of 13 objects	13	208	>= 208
<= 0.40 First 10 of 448 objects	448	7,168	>= 7,168
Total: 3 entries	528	8,448

java.util.Collections$SynchronizedSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 129 objects	129	3,096	>= 5,848
<= 0.40	1	24	40
Total: 2 entries	130	3,120

java.util.HashMap$EntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 235 objects	235	3,760	>= 3,760
<= 0.20 First 10 of 34 objects	34	544	>= 544
<= 0.40 First 10 of 60 objects	60	960	>= 960
<= 0.60	1	16	16
Total: 4 entries	330	5,280

java.util.IdentityHashMap

java.util.concurrent.ConcurrentSkipListSet

java.util.concurrent.ConcurrentSkipListMap

java.util.Collections$SingletonMap

java.util.WeakHashMap$KeySet

java.util.TreeMap$KeySet

java.util.IdentityHashMap$KeySet

java.util.Collections$SingletonSet

java.util.Hashtable$KeySet

java.util.TreeMap$EntrySet