java.util.HashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 9,695 objects	9,695	465,360	>= 2,017,216
<= 0.20 First 10 of 225 objects	225	10,800	>= 6,997,336
<= 0.40 First 10 of 1,728 objects	1,728	82,944	>= 44,299,928
<= 0.60 First 10 of 205 objects	205	9,840	>= 220,256
<= 0.80 All 4 objects	4	192	>= 1,512
<= 1.00	1	48	720
Total: 6 entries	11,858	569,184

java.util.LinkedHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,995 objects	19,995	1,119,720	>= 4,635,280
<= 0.20 All 2 objects	2	112	>= 106,792
<= 0.40 All 3 objects	3	168	>= 1,840
Total: 3 entries	20,000	1,120,000

java.util.WeakHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 1,326 objects	1,326	63,648	>= 297,944
<= 0.20 All 3 objects	3	144	>= 102,000
<= 0.40 All 4 objects	4	192	>= 38,720,456
Total: 3 entries	1,333	63,984

java.util.concurrent.ConcurrentHashMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 11,162 objects	11,162	714,368	>= 7,509,016
<= 0.20 First 10 of 123 objects	123	7,872	>= 20,269,160
<= 0.40 First 10 of 224 objects	224	14,336	>= 27,166,848
<= 0.60 All 5 objects	5	320	>= 2,760
Total: 4 entries	11,514	736,896

java.util.Hashtable

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,978 objects	19,978	958,944	>= 5,595,648
<= 0.20 First 10 of 12 objects	12	576	>= 9,037,640
<= 0.40 All 10 objects	10	480	>= 1,121,744
Total: 3 entries	20,000	960,000

java.util.jar.Attributes

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,997 objects	19,997	319,952	>= 4,959,256
<= 0.20	1	16	1,168
<= 0.40 All 2 objects	2	32	>= 1,536
Total: 3 entries	20,000	320,000

java.util.Collections$UnmodifiableMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 7,209 objects	7,209	230,688	>= 2,998,024
<= 0.20 First 10 of 67 objects	67	2,144	>= 111,368
<= 0.40 First 10 of 239 objects	239	7,648	>= 802,296
<= 0.60 All 6 objects	6	192	>= 6,760
<= 0.80	1	32	400
<= 1.00	1	32	752
Total: 6 entries	7,523	240,736

java.util.HashSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 3,499 objects	3,499	55,984	>= 860,224
<= 0.20 First 10 of 56 objects	56	896	>= 66,416
<= 0.40 First 10 of 507 objects	507	8,112	>= 1,262,472
<= 0.60 First 10 of 31 objects	31	496	>= 16,232
<= 0.80	1	16	448
Total: 5 entries	4,094	65,504

java.util.LinkedHashSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 3,364 objects	3,364	53,824	>= 556,904
<= 0.20 First 10 of 87 objects	87	1,392	>= 144,616
<= 0.40 First 10 of 166 objects	166	2,656	>= 254,632
<= 0.60 First 10 of 20 objects	20	320	>= 7,032
<= 0.80	1	16	1,952
Total: 5 entries	3,638	58,208

java.util.LinkedHashMap$LinkedEntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 19,995 objects	19,995	319,920	>= 319,920
<= 0.20	1	16	16
<= 0.40 All 2 objects	2	32	>= 32
<= 0.60 All 2 objects	2	32	>= 32
Total: 4 entries	20,000	320,000

java.util.Collections$SetFromMap

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 1,219 objects	1,219	29,256	>= 279,256
<= 0.20 First 10 of 17 objects	17	408	>= 23,176
<= 0.40 First 10 of 14 objects	14	336	>= 309,248
Total: 3 entries	1,250	30,000

java.util.Collections$UnmodifiableSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 2,139 objects	2,139	34,224	>= 415,616
<= 0.20 First 10 of 68 objects	68	1,088	>= 23,752
<= 0.40 First 10 of 173 objects	173	2,768	>= 107,832
<= 0.60 All 4 objects	4	64	>= 1,840
Total: 4 entries	2,384	38,144

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	>= 222,040
<= 0.40 All 9 objects	9	504	>= 210,328
<= 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 172 objects	172	5,504	>= 357,200
<= 0.20	1	32	70,504
Total: 2 entries	173	5,536

java.lang.ThreadLocal$ThreadLocalMap

java.util.Collections$SynchronizedSet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 2,838 objects	2,838	68,112	>= 113,568
<= 0.40 All 3 objects	3	72	>= 1,368
Total: 2 entries	2,841	68,184

java.util.TreeMap$EntrySet

java.util.EnumMap

java.util.Hashtable$EntrySet

java.util.LinkedHashMap$LinkedKeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 2,210 objects	2,210	35,360	>= 36,008
<= 0.20 First 10 of 103 objects	103	1,648	>= 1,648
<= 0.40 First 10 of 153 objects	153	2,448	>= 4,952
<= 0.60 First 10 of 25 objects	25	400	>= 400
<= 0.80	1	16	16
Total: 5 entries	2,492	39,872

java.util.HashMap$KeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 734 objects	734	11,744	>= 18,672
<= 0.20 First 10 of 75 objects	75	1,200	>= 1,568
<= 0.40 First 10 of 176 objects	176	2,816	>= 2,816
<= 0.60 First 10 of 26 objects	26	416	>= 1,696
<= 0.80	1	16	16
Total: 5 entries	1,012	16,192

java.util.WeakHashMap$KeySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 1,187 objects	1,187	18,992	>= 18,992
<= 0.20	1	16	16
Total: 2 entries	1,188	19,008

java.util.HashMap$EntrySet

Collision Ratio	# Objects	Shallow Heap	Retained Heap
<= 0.00 First 10 of 399 objects	399	6,384	>= 6,384
<= 0.20 First 10 of 20 objects	20	320	>= 320
<= 0.40 First 10 of 168 objects	168	2,688	>= 2,688
<= 0.60 First 10 of 23 objects	23	368	>= 368
<= 0.80	1	16	16
Total: 5 entries	611	9,776

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	2,632
Total: 2 entries	18	720

java.util.RegularEnumSet

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 38 objects	38	912	>= 2,880
<= 0.20 First 10 of 21 objects	21	504	>= 504
<= 0.40 First 10 of 25 objects	25	600	>= 600
Total: 3 entries	84	2,016

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