java.util.concurrent.ConcurrentHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,130 objects	19,130	1,224,320	>= 160,141,064
<= 0.20 First 10 of 464 objects	464	29,696	>= 16,828,840
<= 0.40 First 10 of 380 objects	380	24,320	>= 111,352,104
<= 0.60 First 10 of 26 objects	26	1,664	>= 39,488
Total: 4 entries	20,000	1,280,000

java.util.HashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 18,306 objects	18,306	878,688	>= 3,120,720
<= 0.20 First 10 of 630 objects	630	30,240	>= 1,408,288
<= 0.40 First 10 of 1,032 objects	1,032	49,536	>= 4,551,320
<= 0.60 First 10 of 32 objects	32	1,536	>= 90,576
Total: 4 entries	20,000	960,000

java.lang.ThreadLocal$ThreadLocalMap

java.util.Hashtable

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 5,436 objects	5,436	260,928	>= 1,214,056
<= 0.20 First 10 of 499 objects	499	23,952	>= 11,674,600
<= 0.40 First 10 of 989 objects	989	47,472	>= 5,386,728
<= 0.60 First 10 of 65 objects	65	3,120	>= 285,640
<= 0.80 First 10 of 47 objects	47	2,256	>= 42,544
<= 1.00 All 8 objects	8	384	>= 5,568
Total: 6 entries	7,044	338,112

java.util.LinkedHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 16,439 objects	16,439	920,584	>= 2,224,440
<= 0.20 First 10 of 138 objects	138	7,728	>= 151,184
<= 0.40 First 10 of 509 objects	509	28,504	>= 1,220,048
<= 0.60 First 10 of 290 objects	290	16,240	>= 80,392
<= 0.80 First 10 of 175 objects	175	9,800	>= 36,400
Total: 5 entries	17,551	982,856

java.util.HashSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 11,333 objects	11,333	181,328	>= 1,770,304
<= 0.20 First 10 of 327 objects	327	5,232	>= 254,720
<= 0.40 First 10 of 492 objects	492	7,872	>= 622,744
<= 0.60 First 10 of 18 objects	18	288	>= 6,032
Total: 4 entries	12,170	194,720

java.util.Properties

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 101 objects	101	5,656	>= 30,376
<= 0.20	1	56	1,264
<= 0.40 First 10 of 48 objects	48	2,688	>= 1,764,800
Total: 3 entries	150	8,400

java.util.Collections$SetFromMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 253 objects	253	6,072	>= 69,336
<= 0.20 First 10 of 1,162 objects	1,162	27,888	>= 836,800
<= 0.40 First 10 of 763 objects	763	18,312	>= 409,024
Total: 3 entries	2,178	52,272

java.util.LinkedHashSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 3,691 objects	3,691	59,056	>= 634,672
<= 0.20 First 10 of 62 objects	62	992	>= 57,968
<= 0.40 First 10 of 141 objects	141	2,256	>= 119,376
<= 0.60 First 10 of 74 objects	74	1,184	>= 19,096
Total: 4 entries	3,968	63,488

java.util.Collections$SynchronizedMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 1,602 objects	1,602	51,264	>= 559,440
<= 0.20 All 2 objects	2	64	>= 34,160
<= 0.40 All 4 objects	4	128	>= 18,688
<= 0.60 All 5 objects	5	160	>= 16,952
Total: 4 entries	1,613	51,616

java.util.Collections$UnmodifiableMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 2,280 objects	2,280	72,960	>= 105,056
<= 0.20 First 10 of 18 objects	18	576	>= 31,416
<= 0.40 First 10 of 45 objects	45	1,440	>= 252,504
<= 0.60 First 10 of 12 objects	12	384	>= 4,600
Total: 4 entries	2,355	75,360

java.util.Collections$UnmodifiableSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 1,343 objects	1,343	21,488	>= 256,480
<= 0.20 First 10 of 15 objects	15	240	>= 11,520
<= 0.40 First 10 of 54 objects	54	864	>= 43,352
<= 0.60 All 7 objects	7	112	>= 2,008
Total: 4 entries	1,419	22,704

java.util.jar.Attributes

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 27 objects	27	432	>= 21,000
<= 0.40 First 10 of 53 objects	53	848	>= 155,576
Total: 2 entries	80	1,280

java.util.WeakHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 434 objects	434	20,832	>= 121,632
<= 0.20 First 10 of 34 objects	34	1,632	>= 37,608
<= 0.40 All 6 objects	6	288	>= 4,928
<= 0.60 All 2 objects	2	96	>= 1,216
Total: 4 entries	476	22,848

java.util.RegularEnumSet

java.util.HashMap$KeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 4,037 objects	4,037	64,592	>= 64,592
<= 0.20 First 10 of 304 objects	304	4,864	>= 4,864
<= 0.40 First 10 of 291 objects	291	4,656	>= 4,656
<= 0.60 All 7 objects	7	112	>= 112
Total: 4 entries	4,639	74,224

java.util.LinkedHashMap$LinkedKeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 4,043 objects	4,043	64,688	>= 64,688
<= 0.20 First 10 of 18 objects	18	288	>= 288
<= 0.40 First 10 of 43 objects	43	688	>= 688
<= 0.60 First 10 of 109 objects	109	1,744	>= 1,744
Total: 4 entries	4,213	67,408

java.util.concurrent.ConcurrentHashMap$KeySetView

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 274 objects	274	6,576	>= 6,848
<= 0.20 First 10 of 1,165 objects	1,165	27,960	>= 27,960
<= 0.40 First 10 of 799 objects	799	19,176	>= 19,176
Total: 3 entries	2,238	53,712

java.util.concurrent.ConcurrentHashMap$EntrySetView

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 53 objects	53	848	>= 848
<= 0.20 First 10 of 11 objects	11	176	>= 176
<= 0.40 First 10 of 1,882 objects	1,882	30,112	>= 30,112
Total: 3 entries	1,946	31,136

java.util.Collections$SynchronizedSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 612 objects	612	14,688	>= 27,552
<= 0.40 First 10 of 25 objects	25	600	>= 1,000
Total: 2 entries	637	15,288

java.util.TreeMap$KeySet

java.util.HashMap$EntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 716 objects	716	11,456	>= 11,456
<= 0.20 First 10 of 149 objects	149	2,384	>= 2,384
<= 0.40 First 10 of 112 objects	112	1,792	>= 1,792
<= 0.60 All 3 objects	3	48	>= 48
Total: 4 entries	980	15,680

java.util.LinkedHashMap$LinkedEntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 531 objects	531	8,496	>= 8,496
<= 0.20 First 10 of 19 objects	19	304	>= 304
<= 0.40 First 10 of 27 objects	27	432	>= 432
<= 0.60 First 10 of 92 objects	92	1,472	>= 1,472
Total: 4 entries	669	10,704

java.util.IdentityHashMap

java.util.concurrent.ConcurrentSkipListSet

java.util.concurrent.ConcurrentSkipListMap

java.util.Collections$SingletonMap

java.util.WeakHashMap$KeySet

java.util.IdentityHashMap$KeySet

java.util.Hashtable$KeySet

java.util.Collections$SingletonSet

java.util.TreeMap$EntrySet