java.util.WeakHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 1,322 objects	1,322	63,456	>= 298,064
<= 0.20 All 2 objects	2	96	>= 100,336
<= 0.40 All 4 objects	4	192	>= 44,766,688
Total: 3 entries	1,328	63,744

java.util.HashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 9,080 objects	9,080	435,840	>= 2,082,336
<= 0.20 First 10 of 181 objects	181	8,688	>= 4,537,936
<= 0.40 First 10 of 1,647 objects	1,647	79,056	>= 34,941,896
<= 0.60 First 10 of 201 objects	201	9,648	>= 219,104
<= 0.80 All 4 objects	4	192	>= 1,512
<= 1.00	1	48	720
Total: 6 entries	11,114	533,472

java.util.concurrent.ConcurrentHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 11,060 objects	11,060	707,840	>= 7,571,824
<= 0.20 First 10 of 201 objects	201	12,864	>= 22,571,696
<= 0.40 First 10 of 128 objects	128	8,192	>= 25,827,760
<= 0.60 All 7 objects	7	448	>= 53,120
Total: 4 entries	11,396	729,344

java.util.LinkedHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,891 objects	19,891	1,113,896	>= 4,845,504
<= 0.20 First 10 of 49 objects	49	2,744	>= 4,402,632
<= 0.40 First 10 of 44 objects	44	2,464	>= 70,920
<= 0.60 First 10 of 16 objects	16	896	>= 3,328
Total: 4 entries	20,000	1,120,000

java.util.Hashtable

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,979 objects	19,979	958,992	>= 5,648,936
<= 0.20 First 10 of 11 objects	11	528	>= 7,786,392
<= 0.40 All 10 objects	10	480	>= 1,123,936
Total: 3 entries	20,000	960,000

java.util.jar.Attributes

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,993 objects	19,993	319,888	>= 5,006,512
<= 0.20	1	16	3,720
<= 0.40 All 6 objects	6	96	>= 33,096
Total: 3 entries	20,000	320,000

java.util.HashSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 3,658 objects	3,658	58,528	>= 884,784
<= 0.20 First 10 of 35 objects	35	560	>= 46,160
<= 0.40 First 10 of 517 objects	517	8,272	>= 1,265,872
<= 0.60 First 10 of 31 objects	31	496	>= 16,248
<= 0.80	1	16	448
Total: 5 entries	4,242	67,872

java.util.Collections$UnmodifiableMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 1,876 objects	1,876	60,032	>= 183,384
<= 0.20 First 10 of 65 objects	65	2,080	>= 106,104
<= 0.40 First 10 of 219 objects	219	7,008	>= 737,808
<= 0.60 All 6 objects	6	192	>= 6,760
<= 0.80	1	32	400
<= 1.00	1	32	752
Total: 6 entries	2,168	69,376

java.util.LinkedHashSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 3,410 objects	3,410	54,560	>= 565,760
<= 0.20 First 10 of 86 objects	86	1,376	>= 136,056
<= 0.40 First 10 of 125 objects	125	2,000	>= 216,528
<= 0.60 First 10 of 29 objects	29	464	>= 17,664
<= 0.80	1	16	1,952
Total: 5 entries	3,651	58,416

java.util.LinkedHashMap$LinkedEntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,991 objects	19,991	319,856	>= 319,856
<= 0.20	1	16	16
<= 0.40 All 5 objects	5	80	>= 80
<= 0.60 All 3 objects	3	48	>= 48
Total: 4 entries	20,000	320,000

java.util.Collections$SetFromMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 1,226 objects	1,226	29,424	>= 287,392
<= 0.20 First 10 of 13 objects	13	312	>= 70,976
<= 0.40 All 9 objects	9	216	>= 253,184
Total: 3 entries	1,248	29,952

java.util.Collections$UnmodifiableSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 2,151 objects	2,151	34,416	>= 420,376
<= 0.20 First 10 of 59 objects	59	944	>= 18,680
<= 0.40 First 10 of 148 objects	148	2,368	>= 101,568
<= 0.60 First 10 of 21 objects	21	336	>= 12,304
Total: 4 entries	2,379	38,064

java.util.Properties

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 17 objects	17	952	>= 4,520
<= 0.20 All 4 objects	4	224	>= 221,816
<= 0.40 All 9 objects	9	504	>= 209,968
<= 0.60	1	56	1,760
Total: 4 entries	31	1,736

java.util.Collections$SynchronizedMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 169 objects	169	5,408	>= 349,304
<= 0.20	1	32	70,504
Total: 2 entries	170	5,440

java.lang.ThreadLocal$ThreadLocalMap

java.util.Collections$SynchronizedSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 2,789 objects	2,789	66,936	>= 111,608
<= 0.40 All 3 objects	3	72	>= 1,368
Total: 2 entries	2,792	67,008

java.util.EnumMap

java.util.Hashtable$EntrySet

java.util.LinkedHashMap$LinkedKeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 2,232 objects	2,232	35,712	>= 36,008
<= 0.20 First 10 of 102 objects	102	1,632	>= 1,632
<= 0.40 First 10 of 139 objects	139	2,224	>= 4,728
<= 0.60 First 10 of 33 objects	33	528	>= 528
<= 0.80	1	16	16
Total: 5 entries	2,507	40,112

java.util.HashMap$KeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 722 objects	722	11,552	>= 18,480
<= 0.20 First 10 of 40 objects	40	640	>= 1,008
<= 0.40 First 10 of 148 objects	148	2,368	>= 2,368
<= 0.60 First 10 of 24 objects	24	384	>= 1,664
<= 0.80	1	16	16
Total: 5 entries	935	14,960

java.util.WeakHashMap$KeySet

java.util.HashMap$EntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 403 objects	403	6,448	>= 6,448
<= 0.20 First 10 of 21 objects	21	336	>= 336
<= 0.40 First 10 of 148 objects	148	2,368	>= 2,368
<= 0.60 First 10 of 18 objects	18	288	>= 288
<= 0.80	1	16	16
Total: 5 entries	591	9,456

java.util.IdentityHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 17 objects	17	680	>= 4,416
<= 0.20	1	40	2,664
Total: 2 entries	18	720

java.util.ImmutableCollections$MapN

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00	1	32	48
<= 0.20 All 2 objects	2	64	>= 272
<= 0.40 All 3 objects	3	96	>= 3,944
Total: 3 entries	6	192

java.util.concurrent.ConcurrentHashMap$KeySetView

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 47 objects	47	1,128	>= 2,584
<= 0.20 First 10 of 17 objects	17	408	>= 408
<= 0.40 First 10 of 21 objects	21	504	>= 504
Total: 3 entries	85	2,040

java.util.RegularEnumSet

java.util.TreeMap$EntrySet

java.util.Collections$SingletonMap

java.util.Hashtable$KeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 37 objects	37	592	>= 592
<= 0.40	1	16	16
Total: 2 entries	38	608

java.util.Collections$SingletonSet

java.util.concurrent.ConcurrentHashMap$EntrySetView

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 All 8 objects	8	128	>= 128
<= 0.20 All 3 objects	3	48	>= 48
<= 0.40 All 9 objects	9	144	>= 144
<= 0.60	1	16	16
Total: 4 entries	21	336

java.util.concurrent.ConcurrentSkipListSet

java.util.concurrent.ConcurrentSkipListMap

java.util.TreeMap$KeySet

java.util.IdentityHashMap$KeySet

sun.awt.WeakIdentityHashMap

java.lang.ProcessEnvironment$StringEnvironment

java.util.Collections$EmptyMap

java.lang.ProcessEnvironment$StringEntrySet

java.util.Collections$EmptySet

java.util.concurrent.ConcurrentSkipListMap$KeySet

java.util.Properties$EntrySet