https://cassandra.apache.org: The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
  • Andres de la Peña
  • Avinash Lakshman
  • Aleksey Yeschenko
  • Aaron Morton
  • Ariel Weisberg
  • Blake Eggleston
  • Benedict Elliott Smith
  • Benjamin Lerer
  • Branimir Lambov
  • Brandon Williams
  • Carl Yeksigian
  • David Brosiusd
  • Dikang Gu
  • Eric Evans
  • Gary Dusbabek
  • Chris Goffinet
  • Alex Petrov
  • Laine Jaakko Olavi
  • T Jake Luciani
  • Jason Brown
  • Jonathan Ellis
  • Jake Farrell
  • Jeff Jirsa
  • Joel Knighton
  • Josh McKenzie
  • Johan Oskarsson
  • Jun Rao
  • Jay Zhuang
  • Sankalp Kohli
  • Marcus Eriksson
  • Michael Semb Wever
  • Mikhail Stepura
  • Michael Shuler
  • Paulo Motta
  • Prashant Malik
  • Robert Stupp
  • Peter Schuller
  • Sam Tunnicliffe
  • Sylvain Lebresne
  • Stefania Alborghetti
  • Tyler Hobbs
  • Vijay Parthasarathy
  • Pavel Yaskevich
  • Yuki Morishita
  • Nate McCall 
public class org.apache.cassandra.utils.ObjectSizes
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.cassandra.utils.ObjectSizes
  super_class: java.lang.Object
{
  private static final org.github.jamm.MemoryMeter meter;
    descriptor: Lorg/github/jamm/MemoryMeter;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static final long BUFFER_EMPTY_SIZE;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static final long STRING_EMPTY_SIZE;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 34
            new org.github.jamm.MemoryMeter
            dup
            invokespecial org.github.jamm.MemoryMeter.<init>:()V
         1: .line 35
            invokevirtual org.github.jamm.MemoryMeter.omitSharedBufferOverhead:()Lorg/github/jamm/MemoryMeter;
         2: .line 36
            getstatic org.github.jamm.MemoryMeter$Guess.FALLBACK_UNSAFE:Lorg/github/jamm/MemoryMeter$Guess;
            invokevirtual org.github.jamm.MemoryMeter.withGuessing:(Lorg/github/jamm/MemoryMeter$Guess;)Lorg/github/jamm/MemoryMeter;
         3: .line 37
            invokevirtual org.github.jamm.MemoryMeter.ignoreKnownSingletons:()Lorg/github/jamm/MemoryMeter;
         4: .line 34
            putstatic org.apache.cassandra.utils.ObjectSizes.meter:Lorg/github/jamm/MemoryMeter;
         5: .line 39
            getstatic org.apache.cassandra.utils.ByteBufferUtil.EMPTY_BYTE_BUFFER:Ljava/nio/ByteBuffer;
            invokestatic org.apache.cassandra.utils.ObjectSizes.measure:(Ljava/lang/Object;)J
            putstatic org.apache.cassandra.utils.ObjectSizes.BUFFER_EMPTY_SIZE:J
         6: .line 40
            ldc ""
            invokestatic org.apache.cassandra.utils.ObjectSizes.measure:(Ljava/lang/Object;)J
            putstatic org.apache.cassandra.utils.ObjectSizes.STRING_EMPTY_SIZE:J
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.cassandra.utils.ObjectSizes this
         0: .line 32
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.apache.cassandra.utils.ObjectSizes this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/cassandra/utils/ObjectSizes;

  public static long sizeOfArray(byte[]);
    descriptor: ([B)J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // byte[] bytes
         0: .line 49
            aload 0 /* bytes */
            arraylength
            lconst_1
            invokestatic org.apache.cassandra.utils.ObjectSizes.sizeOfArray:(IJ)J
            lreturn
        end local 0 // byte[] bytes
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0  bytes  [B
    MethodParameters:
       Name  Flags
      bytes  

  public static long sizeOfArray(long[]);
    descriptor: ([J)J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // long[] longs
         0: .line 59
            aload 0 /* longs */
            arraylength
            ldc 8
            invokestatic org.apache.cassandra.utils.ObjectSizes.sizeOfArray:(IJ)J
            lreturn
        end local 0 // long[] longs
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0  longs  [J
    MethodParameters:
       Name  Flags
      longs  

  public static long sizeOfArray(int[]);
    descriptor: ([I)J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // int[] ints
         0: .line 69
            aload 0 /* ints */
            arraylength
            ldc 4
            invokestatic org.apache.cassandra.utils.ObjectSizes.sizeOfArray:(IJ)J
            lreturn
        end local 0 // int[] ints
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  ints  [I
    MethodParameters:
      Name  Flags
      ints  

  public static long sizeOfReferenceArray(int);
    descriptor: (I)J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // int length
         0: .line 79
            iload 0 /* length */
            getstatic org.github.jamm.MemoryLayoutSpecification.SPEC:Lorg/github/jamm/MemoryLayoutSpecification;
            invokevirtual org.github.jamm.MemoryLayoutSpecification.getReferenceSize:()I
            i2l
            invokestatic org.apache.cassandra.utils.ObjectSizes.sizeOfArray:(IJ)J
            lreturn
        end local 0 // int length
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    1     0  length  I
    MethodParameters:
        Name  Flags
      length  

  public static long sizeOfArray(java.lang.Object[]);
    descriptor: ([Ljava/lang/Object;)J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // java.lang.Object[] objects
         0: .line 89
            aload 0 /* objects */
            arraylength
            invokestatic org.apache.cassandra.utils.ObjectSizes.sizeOfReferenceArray:(I)J
            lreturn
        end local 0 // java.lang.Object[] objects
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0  objects  [Ljava/lang/Object;
    MethodParameters:
         Name  Flags
      objects  

  private static long sizeOfArray(int, long);
    descriptor: (IJ)J
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // int length
        start local 1 // long elementSize
         0: .line 94
            iload 0 /* length */
            lload 1 /* elementSize */
            invokestatic org.github.jamm.MemoryLayoutSpecification.sizeOfArray:(IJ)J
            lreturn
        end local 1 // long elementSize
        end local 0 // int length
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    1     0       length  I
            0    1     1  elementSize  J
    MethodParameters:
             Name  Flags
      length       
      elementSize  

  public static long sizeOnHeapOf(java.nio.ByteBuffer[]);
    descriptor: ([Ljava/nio/ByteBuffer;)J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=4, args_size=1
        start local 0 // java.nio.ByteBuffer[] array
         0: .line 102
            lconst_0
            lstore 1 /* allElementsSize */
        start local 1 // long allElementsSize
         1: .line 103
            iconst_0
            istore 3 /* i */
        start local 3 // int i
         2: goto 6
         3: .line 104
      StackMap locals: long int
      StackMap stack:
            aload 0 /* array */
            iload 3 /* i */
            aaload
            ifnull 5
         4: .line 105
            lload 1 /* allElementsSize */
            aload 0 /* array */
            iload 3 /* i */
            aaload
            invokestatic org.apache.cassandra.utils.ObjectSizes.sizeOnHeapOf:(Ljava/nio/ByteBuffer;)J
            ladd
            lstore 1 /* allElementsSize */
         5: .line 103
      StackMap locals:
      StackMap stack:
            iinc 3 /* i */ 1
      StackMap locals:
      StackMap stack:
         6: iload 3 /* i */
            aload 0 /* array */
            arraylength
            if_icmplt 3
        end local 3 // int i
         7: .line 107
            lload 1 /* allElementsSize */
            aload 0 /* array */
            invokestatic org.apache.cassandra.utils.ObjectSizes.sizeOfArray:([Ljava/lang/Object;)J
            ladd
            lreturn
        end local 1 // long allElementsSize
        end local 0 // java.nio.ByteBuffer[] array
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    8     0            array  [Ljava/nio/ByteBuffer;
            1    8     1  allElementsSize  J
            2    7     3                i  I
    MethodParameters:
       Name  Flags
      array  

  public static long sizeOnHeapExcludingData(java.nio.ByteBuffer[]);
    descriptor: ([Ljava/nio/ByteBuffer;)J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // java.nio.ByteBuffer[] array
         0: .line 112
            getstatic org.apache.cassandra.utils.ObjectSizes.BUFFER_EMPTY_SIZE:J
            aload 0 /* array */
            arraylength
            i2l
            lmul
            aload 0 /* array */
            invokestatic org.apache.cassandra.utils.ObjectSizes.sizeOfArray:([Ljava/lang/Object;)J
            ladd
            lreturn
        end local 0 // java.nio.ByteBuffer[] array
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0  array  [Ljava/nio/ByteBuffer;
    MethodParameters:
       Name  Flags
      array  

  public static long sizeOnHeapOf(java.nio.ByteBuffer);
    descriptor: (Ljava/nio/ByteBuffer;)J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // java.nio.ByteBuffer buffer
         0: .line 122
            aload 0 /* buffer */
            invokevirtual java.nio.ByteBuffer.isDirect:()Z
            ifeq 2
         1: .line 123
            getstatic org.apache.cassandra.utils.ObjectSizes.BUFFER_EMPTY_SIZE:J
            lreturn
         2: .line 126
      StackMap locals:
      StackMap stack:
            aload 0 /* buffer */
            invokevirtual java.nio.ByteBuffer.capacity:()I
            aload 0 /* buffer */
            invokevirtual java.nio.ByteBuffer.remaining:()I
            if_icmple 4
         3: .line 127
            aload 0 /* buffer */
            invokevirtual java.nio.ByteBuffer.remaining:()I
            i2l
            lreturn
         4: .line 128
      StackMap locals:
      StackMap stack:
            getstatic org.apache.cassandra.utils.ObjectSizes.BUFFER_EMPTY_SIZE:J
            aload 0 /* buffer */
            invokevirtual java.nio.ByteBuffer.capacity:()I
            lconst_1
            invokestatic org.apache.cassandra.utils.ObjectSizes.sizeOfArray:(IJ)J
            ladd
            lreturn
        end local 0 // java.nio.ByteBuffer buffer
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    5     0  buffer  Ljava/nio/ByteBuffer;
    MethodParameters:
        Name  Flags
      buffer  

  public static long sizeOnHeapExcludingData(java.nio.ByteBuffer);
    descriptor: (Ljava/nio/ByteBuffer;)J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // java.nio.ByteBuffer buffer
         0: .line 133
            getstatic org.apache.cassandra.utils.ObjectSizes.BUFFER_EMPTY_SIZE:J
            lreturn
        end local 0 // java.nio.ByteBuffer buffer
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    1     0  buffer  Ljava/nio/ByteBuffer;
    MethodParameters:
        Name  Flags
      buffer  

  public static long sizeOf(java.lang.String);
    descriptor: (Ljava/lang/String;)J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // java.lang.String str
         0: .line 143
            getstatic org.apache.cassandra.utils.ObjectSizes.STRING_EMPTY_SIZE:J
            aload 0 /* str */
            invokevirtual java.lang.String.length:()I
            ldc 2
            invokestatic org.apache.cassandra.utils.ObjectSizes.sizeOfArray:(IJ)J
            ladd
            lreturn
        end local 0 // java.lang.String str
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0   str  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      str   

  public static long measureDeep(java.lang.Object);
    descriptor: (Ljava/lang/Object;)J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // java.lang.Object pojo
         0: .line 154
            getstatic org.apache.cassandra.utils.ObjectSizes.meter:Lorg/github/jamm/MemoryMeter;
            aload 0 /* pojo */
            invokevirtual org.github.jamm.MemoryMeter.measureDeep:(Ljava/lang/Object;)J
            lreturn
        end local 0 // java.lang.Object pojo
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  pojo  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      pojo  

  public static long measure(java.lang.Object);
    descriptor: (Ljava/lang/Object;)J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // java.lang.Object pojo
         0: .line 163
            getstatic org.apache.cassandra.utils.ObjectSizes.meter:Lorg/github/jamm/MemoryMeter;
            aload 0 /* pojo */
            invokevirtual org.github.jamm.MemoryMeter.measure:(Ljava/lang/Object;)J
            lreturn
        end local 0 // java.lang.Object pojo
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  pojo  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      pojo  
}
SourceFile: "ObjectSizes.java"
InnerClasses:
  public final Guess = org.github.jamm.MemoryMeter$Guess of org.github.jamm.MemoryMeter