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xuwei-k/jol-example

Last active April 9, 2016 12:13
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jol sample
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jol-example
$ screpl org.openjdk.jol%jol-core%0.2
[info] Loading global plugins from /Users/user/.sbt/0.13/plugins
[info] Set current project to ivy-console (in build file:/Users/user/.sbt/boot/ivy-console/)
Welcome to Scala version 2.11.4 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_25).
Type in expressions to have them evaluated.
Type :help for more information.
scala> println(org.openjdk.jol.info.ClassLayout.parseClass(classOf[Vector[Int]]).toPrintable)
scala.collection.immutable.Vector object internals:
OFFSET SIZE TYPE DESCRIPTION VALUE
0 12 (object header) N/A
12 4 int Vector.startIndex N/A
16 4 int Vector.endIndex N/A
20 4 int Vector.focus N/A
24 4 int Vector.depth N/A
28 1 boolean Vector.dirty N/A
29 3 (alignment/padding gap) N/A
32 4 Object[] Vector.display0 N/A
36 4 Object[] Vector.display1 N/A
40 4 Object[] Vector.display2 N/A
44 4 Object[] Vector.display3 N/A
48 4 Object[] Vector.display4 N/A
52 4 Object[] Vector.display5 N/A
Instance size: 56 bytes (estimated, the sample instance is not available)
Space losses: 3 bytes internal + 0 bytes external = 3 bytes total
@matanox
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matanox commented Apr 9, 2016

screpl?

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