java.util.concurrent.ConcurrentHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 8,520 objects	8,520	545,280	>= 20,691,632
<= 0.20 First 10 of 10,050 objects	10,050	643,200	>= 165,649,992
<= 0.40 First 10 of 1,401 objects	1,401	89,664	>= 464,028,440
<= 0.60 First 10 of 24 objects	24	1,536	>= 181,888
<= 0.80 All 4 objects	4	256	>= 16,424
<= 1.00	1	64	280
Total: 6 entries	20,000	1,280,000

java.util.HashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 13,735 objects	13,735	659,280	>= 2,474,776
<= 0.20 First 10 of 1,312 objects	1,312	62,976	>= 3,601,744
<= 0.40 First 10 of 3,433 objects	3,433	164,784	>= 50,765,872
<= 0.60 First 10 of 1,505 objects	1,505	72,240	>= 1,021,512
<= 0.80 First 10 of 15 objects	15	720	>= 4,248
Total: 5 entries	20,000	960,000

java.util.Hashtable

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 12,201 objects	12,201	585,648	>= 64,064,432
<= 0.20 First 10 of 1,882 objects	1,882	90,336	>= 56,393,648
<= 0.40 First 10 of 4,343 objects	4,343	208,464	>= 15,046,184
<= 0.60 First 10 of 769 objects	769	36,912	>= 6,050,464
<= 0.80 First 10 of 239 objects	239	11,472	>= 553,016
<= 1.00 First 10 of 566 objects	566	27,168	>= 728,336
Total: 6 entries	20,000	960,000

java.util.Collections$UnmodifiableMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 15,612 objects	15,612	499,584	>= 2,051,976
<= 0.20 First 10 of 1,434 objects	1,434	45,888	>= 14,635,872
<= 0.40 First 10 of 2,164 objects	2,164	69,248	>= 49,637,544
<= 0.60 First 10 of 187 objects	187	5,984	>= 143,152
<= 0.80	1	32	208
Total: 5 entries	19,398	620,736

java.util.LinkedHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,076 objects	19,076	1,068,256	>= 3,760,040
<= 0.20 First 10 of 216 objects	216	12,096	>= 790,112
<= 0.40 First 10 of 581 objects	581	32,536	>= 2,898,704
<= 0.60 First 10 of 127 objects	127	7,112	>= 59,632
Total: 4 entries	20,000	1,120,000

java.util.Properties

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 522 objects	522	29,232	>= 100,176
<= 0.20 First 10 of 47 objects	47	2,632	>= 39,435,600
<= 0.40 First 10 of 116 objects	116	6,496	>= 11,389,768
Total: 3 entries	685	38,360

java.lang.ThreadLocal$ThreadLocalMap

java.util.HashSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 18,319 objects	18,319	293,104	>= 2,710,912
<= 0.20 First 10 of 195 objects	195	3,120	>= 329,608
<= 0.40 First 10 of 1,291 objects	1,291	20,656	>= 3,969,352
<= 0.60 First 10 of 184 objects	184	2,944	>= 68,176
<= 0.80 First 10 of 11 objects	11	176	>= 2,384
Total: 5 entries	20,000	320,000

java.util.LinkedHashSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 17,017 objects	17,017	272,272	>= 2,973,496
<= 0.20 First 10 of 621 objects	621	9,936	>= 589,760
<= 0.40 First 10 of 1,745 objects	1,745	27,920	>= 1,499,344
<= 0.60 First 10 of 591 objects	591	9,456	>= 165,088
<= 0.80 First 10 of 26 objects	26	416	>= 6,616
Total: 5 entries	20,000	320,000

java.util.concurrent.ConcurrentSkipListMap

java.util.EnumMap

java.util.WeakHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 738 objects	738	35,424	>= 1,304,704
<= 0.20 First 10 of 22 objects	22	1,056	>= 1,878,648
<= 0.40 All 8 objects	8	384	>= 71,120
<= 1.00	1	48	1,464
Total: 4 entries	769	36,912

java.util.Collections$SynchronizedMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 1,824 objects	1,824	58,368	>= 1,453,592
<= 0.20 First 10 of 17 objects	17	544	>= 1,458,120
<= 0.40 First 10 of 14 objects	14	448	>= 181,672
<= 0.60 All 2 objects	2	64	>= 3,752
<= 1.00	1	32	1,496
Total: 5 entries	1,858	59,456

java.util.Collections$SetFromMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 428 objects	428	10,272	>= 252,576
<= 0.20 First 10 of 672 objects	672	16,128	>= 1,160,744
<= 0.40 First 10 of 407 objects	407	9,768	>= 1,464,872
Total: 3 entries	1,507	36,168

java.util.jar.Attributes

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 4,904 objects	4,904	78,464	>= 1,269,600
<= 0.20 First 10 of 25 objects	25	400	>= 88,576
<= 0.40 First 10 of 200 objects	200	3,200	>= 681,752
<= 0.60	1	16	1,072
Total: 4 entries	5,130	82,080

java.util.Collections$UnmodifiableSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 6,249 objects	6,249	99,984	>= 1,273,184
<= 0.20 First 10 of 128 objects	128	2,048	>= 201,832
<= 0.40 First 10 of 345 objects	345	5,520	>= 474,200
<= 0.60 First 10 of 57 objects	57	912	>= 17,856
Total: 4 entries	6,779	108,464

java.util.LinkedHashMap$LinkedKeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,740 objects	19,740	315,840	>= 315,840
<= 0.20 First 10 of 26 objects	26	416	>= 416
<= 0.40 First 10 of 118 objects	118	1,888	>= 1,888
<= 0.60 First 10 of 106 objects	106	1,696	>= 1,696
<= 0.80 All 10 objects	10	160	>= 160
Total: 5 entries	20,000	320,000

java.util.RegularEnumSet

java.util.HashMap$KeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,494 objects	19,494	311,904	>= 311,904
<= 0.20 First 10 of 215 objects	215	3,440	>= 3,440
<= 0.40 First 10 of 262 objects	262	4,192	>= 4,192
<= 0.60 First 10 of 28 objects	28	448	>= 448
<= 0.80	1	16	16
Total: 5 entries	20,000	320,000

java.util.HashMap$EntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 15,336 objects	15,336	245,376	>= 245,376
<= 0.20 First 10 of 1,696 objects	1,696	27,136	>= 27,136
<= 0.40 First 10 of 2,790 objects	2,790	44,640	>= 44,640
<= 0.60 First 10 of 178 objects	178	2,848	>= 2,848
Total: 4 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 5,715 objects	5,715	91,440	>= 91,440
<= 0.20 First 10 of 102 objects	102	1,632	>= 1,632
<= 0.40 First 10 of 484 objects	484	7,744	>= 7,744
<= 0.60 First 10 of 515 objects	515	8,240	>= 8,240
<= 0.80 First 10 of 163 objects	163	2,608	>= 2,608
Total: 5 entries	6,979	111,664

java.util.concurrent.ConcurrentHashMap$KeySetView

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 1,101 objects	1,101	26,424	>= 70,888
<= 0.20 First 10 of 679 objects	679	16,296	>= 16,296
<= 0.40 First 10 of 413 objects	413	9,912	>= 9,912
<= 1.00	1	24	240
Total: 4 entries	2,194	52,656

java.util.Collections$SynchronizedSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 813 objects	813	19,512	>= 36,968
<= 0.20 First 10 of 21 objects	21	504	>= 2,408
<= 0.40 First 10 of 206 objects	206	4,944	>= 8,224
<= 0.60 First 10 of 105 objects	105	2,520	>= 4,200
<= 0.80 All 2 objects	2	48	>= 80
Total: 5 entries	1,147	27,528

java.util.Collections$SingletonSet

java.util.IdentityHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 16 objects	16	640	>= 5,448
<= 0.20 All 3 objects	3	120	>= 2,632
<= 0.40 All 3 objects	3	120	>= 33,064
Total: 3 entries	22	880

java.util.concurrent.ConcurrentHashMap$EntrySetView

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 235 objects	235	3,760	>= 3,760
<= 0.20 First 10 of 49 objects	49	784	>= 784
<= 0.40 First 10 of 1,069 objects	1,069	17,104	>= 17,104
Total: 3 entries	1,353	21,648

java.util.concurrent.ConcurrentSkipListSet

java.util.Collections$SingletonMap

java.util.Hashtable$EntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 95 objects	95	1,520	>= 1,520
<= 0.20 First 10 of 16 objects	16	256	>= 256
<= 0.40 First 10 of 125 objects	125	2,000	>= 2,000
<= 0.60 First 10 of 67 objects	67	1,072	>= 1,072
<= 0.80	1	16	16
Total: 5 entries	304	4,864

java.util.Hashtable$KeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 71 objects	71	1,136	>= 1,136
<= 0.20 All 4 objects	4	64	>= 64
<= 0.40 First 10 of 80 objects	80	1,280	>= 1,280
<= 0.60 First 10 of 38 objects	38	608	>= 608
<= 0.80	1	16	16
Total: 5 entries	194	3,104

java.util.WeakHashMap$KeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 93 objects	93	1,488	>= 1,488
<= 0.20	1	16	16
Total: 2 entries	94	1,504

java.util.concurrent.ConcurrentSkipListMap$KeySet

java.util.TreeMap$EntrySet

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

java.util.AbstractMap$1

java.util.EnumMap$EntrySet