java.util.concurrent.ConcurrentHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 8,304 objects	8,304	531,456	>= 18,111,944
<= 0.20 First 10 of 10,554 objects	10,554	675,456	>= 132,611,496
<= 0.40 First 10 of 1,118 objects	1,118	71,552	>= 458,545,456
<= 0.60 First 10 of 21 objects	21	1,344	>= 187,560
<= 0.80 All 3 objects	3	192	>= 9,480
Total: 5 entries	20,000	1,280,000

java.util.HashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 14,748 objects	14,748	707,904	>= 2,246,584
<= 0.20 First 10 of 627 objects	627	30,096	>= 1,442,544
<= 0.40 First 10 of 3,216 objects	3,216	154,368	>= 7,429,304
<= 0.60 First 10 of 1,397 objects	1,397	67,056	>= 977,528
<= 0.80 First 10 of 12 objects	12	576	>= 3,408
Total: 5 entries	20,000	960,000

java.util.Hashtable

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 12,338 objects	12,338	592,224	>= 67,992,848
<= 0.20 First 10 of 1,923 objects	1,923	92,304	>= 53,129,968
<= 0.40 First 10 of 4,073 objects	4,073	195,504	>= 22,423,576
<= 0.60 First 10 of 702 objects	702	33,696	>= 3,493,472
<= 0.80 First 10 of 246 objects	246	11,808	>= 296,784
<= 1.00 First 10 of 718 objects	718	34,464	>= 981,768
Total: 6 entries	20,000	960,000

java.util.Collections$UnmodifiableMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 5,449 objects	5,449	174,368	>= 1,430,352
<= 0.20 First 10 of 1,673 objects	1,673	53,536	>= 23,529,712
<= 0.40 First 10 of 3,025 objects	3,025	96,800	>= 91,875,344
<= 0.60 First 10 of 213 objects	213	6,816	>= 167,376
<= 0.80	1	32	208
Total: 5 entries	10,361	331,552

java.util.LinkedHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,856 objects	19,856	1,111,936	>= 1,498,056
<= 0.20 First 10 of 44 objects	44	2,464	>= 508,144
<= 0.40 First 10 of 85 objects	85	4,760	>= 266,288
<= 0.60 First 10 of 15 objects	15	840	>= 10,744
Total: 4 entries	20,000	1,120,000

java.util.Properties

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 564 objects	564	31,584	>= 101,408
<= 0.20 First 10 of 51 objects	51	2,856	>= 38,899,600
<= 0.40 First 10 of 103 objects	103	5,768	>= 11,193,880
Total: 3 entries	718	40,208

java.util.HashSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 18,442 objects	18,442	295,072	>= 2,484,392
<= 0.20 First 10 of 244 objects	244	3,904	>= 330,352
<= 0.40 First 10 of 1,154 objects	1,154	18,464	>= 3,820,976
<= 0.60 First 10 of 147 objects	147	2,352	>= 55,680
<= 0.80 First 10 of 13 objects	13	208	>= 6,912
Total: 5 entries	20,000	320,000

java.util.concurrent.ConcurrentSkipListMap

java.util.LinkedHashSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 16,930 objects	16,930	270,880	>= 2,959,208
<= 0.20 First 10 of 644 objects	644	10,304	>= 596,968
<= 0.40 First 10 of 1,800 objects	1,800	28,800	>= 1,577,632
<= 0.60 First 10 of 599 objects	599	9,584	>= 168,904
<= 0.80 First 10 of 27 objects	27	432	>= 6,840
Total: 5 entries	20,000	320,000

java.util.WeakHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 668 objects	668	32,064	>= 1,237,680
<= 0.20 First 10 of 24 objects	24	1,152	>= 2,002,312
<= 0.40 All 3 objects	3	144	>= 53,992
<= 1.00	1	48	1,464
Total: 4 entries	696	33,408

java.util.EnumMap

java.util.Collections$SynchronizedMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 196 objects	196	6,272	>= 841,824
<= 0.20 First 10 of 16 objects	16	512	>= 1,481,864
<= 0.40 All 9 objects	9	288	>= 151,048
<= 0.60	1	32	376
<= 1.00	1	32	1,496
Total: 5 entries	223	7,136

java.util.Collections$SetFromMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 370 objects	370	8,880	>= 654,808
<= 0.20 First 10 of 88 objects	88	2,112	>= 470,136
<= 0.40 First 10 of 30 objects	30	720	>= 1,181,656
Total: 3 entries	488	11,712

java.util.Collections$UnmodifiableSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 6,782 objects	6,782	108,512	>= 1,362,776
<= 0.20 First 10 of 145 objects	145	2,320	>= 179,760
<= 0.40 First 10 of 400 objects	400	6,400	>= 551,624
<= 0.60 First 10 of 106 objects	106	1,696	>= 40,192
Total: 4 entries	7,433	118,928

java.util.HashMap$KeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,686 objects	19,686	314,976	>= 314,976
<= 0.20 First 10 of 160 objects	160	2,560	>= 2,560
<= 0.40 First 10 of 145 objects	145	2,320	>= 2,320
<= 0.60 All 9 objects	9	144	>= 144
Total: 4 entries	20,000	320,000

java.util.LinkedHashMap$LinkedKeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,974 objects	19,974	319,584	>= 319,584
<= 0.20 All 5 objects	5	80	>= 80
<= 0.40 First 10 of 16 objects	16	256	>= 256
<= 0.60 All 5 objects	5	80	>= 80
Total: 4 entries	20,000	320,000

java.lang.ThreadLocal$ThreadLocalMap

java.util.RegularEnumSet

java.util.HashMap$EntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 8,611 objects	8,611	137,776	>= 137,776
<= 0.20 First 10 of 4,231 objects	4,231	67,696	>= 67,696
<= 0.40 First 10 of 5,842 objects	5,842	93,472	>= 93,472
<= 0.60 First 10 of 1,315 objects	1,315	21,040	>= 21,040
<= 0.80	1	16	16
Total: 5 entries	20,000	320,000

java.util.TreeMap$KeySet

java.util.LinkedHashMap$LinkedEntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 5,053 objects	5,053	80,848	>= 80,848
<= 0.20 First 10 of 119 objects	119	1,904	>= 1,904
<= 0.40 First 10 of 472 objects	472	7,552	>= 7,552
<= 0.60 First 10 of 531 objects	531	8,496	>= 8,496
<= 0.80 First 10 of 161 objects	161	2,576	>= 2,576
Total: 5 entries	6,336	101,376

java.util.concurrent.ConcurrentHashMap$KeySetView

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 1,097 objects	1,097	26,328	>= 70,792
<= 0.20 First 10 of 95 objects	95	2,280	>= 2,280
<= 0.40 First 10 of 36 objects	36	864	>= 864
<= 1.00	1	24	240
Total: 4 entries	1,229	29,496

java.util.Collections$SingletonSet

java.util.IdentityHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 15 objects	15	600	>= 4,488
<= 0.20 All 3 objects	3	120	>= 4,216
<= 0.40 All 4 objects	4	160	>= 33,376
Total: 3 entries	22	880

java.util.Collections$SynchronizedSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 275 objects	275	6,600	>= 12,552
<= 0.20 First 10 of 43 objects	43	1,032	>= 4,728
<= 0.40 First 10 of 206 objects	206	4,944	>= 8,224
<= 0.60 First 10 of 177 objects	177	4,248	>= 7,080
Total: 4 entries	701	16,824

java.util.jar.Attributes

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00	1	16	680
<= 0.40 All 3 objects	3	48	>= 30,888
Total: 2 entries	4	64

java.util.concurrent.ConcurrentSkipListSet

java.util.Hashtable$EntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 139 objects	139	2,224	>= 2,224
<= 0.20 First 10 of 32 objects	32	512	>= 512
<= 0.40 First 10 of 143 objects	143	2,288	>= 2,288
<= 0.60 First 10 of 116 objects	116	1,856	>= 1,856
Total: 4 entries	430	6,880

java.util.Collections$SingletonMap

java.util.concurrent.ConcurrentHashMap$EntrySetView

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 190 objects	190	3,040	>= 3,040
<= 0.20 First 10 of 48 objects	48	768	>= 768
<= 0.40 First 10 of 103 objects	103	1,648	>= 1,648
Total: 3 entries	341	5,456

java.util.Hashtable$KeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 117 objects	117	1,872	>= 1,872
<= 0.20 All 10 objects	10	160	>= 160
<= 0.40 First 10 of 62 objects	62	992	>= 992
<= 0.60 First 10 of 61 objects	61	976	>= 976
Total: 4 entries	250	4,000

java.util.concurrent.ConcurrentSkipListMap$KeySet

java.util.TreeMap$EntrySet

java.util.WeakHashMap$KeySet

javax.script.SimpleBindings

java.util.IdentityHashMap$EntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 All 5 objects	5	80	>= 80
<= 0.20	1	16	16
<= 0.40	1	16	16
Total: 3 entries	7	112

java.util.IdentityHashMap$KeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 All 5 objects	5	80	>= 80
<= 0.20	1	16	16
Total: 2 entries	6	96

java.util.AbstractMap$1

java.util.EnumMap$EntrySet

java.util.WeakHashMap$EntrySet