CopyOnWriteArrayList footprint in jre 1.8

externals

$ sudo java -jar jol-cli-0.3-full.jar externals java.util.concurrent.CopyOnWriteArrayList
Running 64-bit HotSpot VM.
Using compressed oop with 3-bit shift.
Using compressed klass with 3-bit shift.
Objects are 8 bytes aligned.
Field sizes by type: 4, 1, 1, 2, 2, 4, 4, 8, 8 [bytes]
Array element sizes: 4, 1, 1, 2, 2, 4, 4, 8, 8 [bytes]

objc[33686]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home/bin/java and /Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home/jre/lib/libinstrument.dylib. One of the two will be used. Which one is undefined.
java.util.concurrent.CopyOnWriteArrayList object externals:
          ADDRESS       SIZE TYPE                                                 PATH                           VALUE
        76b2c62d8         24 java.util.concurrent.CopyOnWriteArrayList                                           (object)
        76b2c62f0         16 java.util.concurrent.locks.ReentrantLock             .lock                          (object)
        76b2c6300         32 java.util.concurrent.locks.ReentrantLock$NonfairSync .lock.sync                     (object)
        76b2c6320         16 [Ljava.lang.Object;                                  .array                         []

footprint

$ sudo java -jar jol-cli-0.3-full.jar footprint java.util.concurrent.CopyOnWriteArrayList
Password:
Running 64-bit HotSpot VM.
Using compressed oop with 3-bit shift.
Using compressed klass with 3-bit shift.
Objects are 8 bytes aligned.
Field sizes by type: 4, 1, 1, 2, 2, 4, 4, 8, 8 [bytes]
Array element sizes: 4, 1, 1, 2, 2, 4, 4, 8, 8 [bytes]

objc[33668]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home/bin/java and /Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home/jre/lib/libinstrument.dylib. One of the two will be used. Which one is undefined.
java.util.concurrent.CopyOnWriteArrayList instance footprint:
     COUNT       AVG       SUM   DESCRIPTION
         1        16        16   [Ljava.lang.Object;
         1        24        24   java.util.concurrent.CopyOnWriteArrayList
         1        16        16   java.util.concurrent.locks.ReentrantLock
         1        32        32   java.util.concurrent.locks.ReentrantLock$NonfairSync
         4                  88   (total)

version

$ java -version
java version "1.8.0_40-ea"
Java(TM) SE Runtime Environment (build 1.8.0_40-ea-b21)
Java HotSpot(TM) 64-Bit Server VM (build 25.40-b24, mixed mode)