class com.google.common.collect.RegularImmutableMap, this=40, total=40
class [Ljava.lang.Object;, this=272, total=312
  (was array of size: 64)
class [Ljava.util.Map$Entry;, this=48, total=360
  (was array of size: 8)
class com.google.common.collect.ImmutableEntry, this=16, total=376
class com.google.common.collect.ImmutableEntry, this=16, total=392
class com.google.common.collect.ImmutableEntry, this=16, total=408
class com.google.common.collect.ImmutableEntry, this=16, total=424
class com.google.common.collect.ImmutableEntry, this=16, total=440
class com.google.common.collect.ImmutableEntry, this=16, total=456
class com.google.common.collect.ImmutableEntry, this=16, total=472
class com.google.common.collect.ImmutableEntry, this=16, total=488

Google: 488

class java.util.HashMap, this=40, total=40
class [Ljava.util.HashMap$Entry;, this=80, total=120
  (was array of size: 16)
class java.util.HashMap$Entry, this=24, total=144
class java.util.HashMap$Entry, this=24, total=168
class java.util.HashMap$Entry, this=24, total=192
class java.util.HashMap$Entry, this=24, total=216
class java.util.HashMap$Entry, this=24, total=240
class java.util.HashMap$Entry, this=24, total=264
class java.util.HashMap$Entry, this=24, total=288
class java.util.HashMap$Entry, this=24, total=312

JDK: 312

Google/JDK =  1.564102564102564