http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
class org.apache.fop.area.AreaTreeHandler$Statistics
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.apache.fop.area.AreaTreeHandler$Statistics
  super_class: java.lang.Object
{
  private java.lang.Runtime runtime;
    descriptor: Ljava/lang/Runtime;
    flags: (0x0002) ACC_PRIVATE

  private long initialMemory;
    descriptor: J
    flags: (0x0002) ACC_PRIVATE

  private long startTime;
    descriptor: J
    flags: (0x0002) ACC_PRIVATE

  final org.apache.fop.area.AreaTreeHandler this$0;
    descriptor: Lorg/apache/fop/area/AreaTreeHandler;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  protected void <init>(org.apache.fop.area.AreaTreeHandler);
    descriptor: (Lorg/apache/fop/area/AreaTreeHandler;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.apache.fop.area.AreaTreeHandler$Statistics this
         0: .line 490
            aload 0 /* this */
            aload 1
            putfield org.apache.fop.area.AreaTreeHandler$Statistics.this$0:Lorg/apache/fop/area/AreaTreeHandler;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 491
            aload 0 /* this */
            invokestatic java.lang.Runtime.getRuntime:()Ljava/lang/Runtime;
            putfield org.apache.fop.area.AreaTreeHandler$Statistics.runtime:Ljava/lang/Runtime;
         2: .line 492
            return
        end local 0 // org.apache.fop.area.AreaTreeHandler$Statistics this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/apache/fop/area/AreaTreeHandler$Statistics;
    MethodParameters:
        Name  Flags
      this$0  final

  protected void start();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // org.apache.fop.area.AreaTreeHandler$Statistics this
         0: .line 498
            aload 0 /* this */
            aload 0 /* this */
            getfield org.apache.fop.area.AreaTreeHandler$Statistics.runtime:Ljava/lang/Runtime;
            invokevirtual java.lang.Runtime.totalMemory:()J
            aload 0 /* this */
            getfield org.apache.fop.area.AreaTreeHandler$Statistics.runtime:Ljava/lang/Runtime;
            invokevirtual java.lang.Runtime.freeMemory:()J
            lsub
            putfield org.apache.fop.area.AreaTreeHandler$Statistics.initialMemory:J
         1: .line 499
            aload 0 /* this */
            invokestatic java.lang.System.currentTimeMillis:()J
            putfield org.apache.fop.area.AreaTreeHandler$Statistics.startTime:J
         2: .line 500
            return
        end local 0 // org.apache.fop.area.AreaTreeHandler$Statistics this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/apache/fop/area/AreaTreeHandler$Statistics;

  protected void end();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=6, locals=3, args_size=1
        start local 0 // org.apache.fop.area.AreaTreeHandler$Statistics this
         0: .line 506
            aload 0 /* this */
            getfield org.apache.fop.area.AreaTreeHandler$Statistics.runtime:Ljava/lang/Runtime;
            invokevirtual java.lang.Runtime.totalMemory:()J
            aload 0 /* this */
            getfield org.apache.fop.area.AreaTreeHandler$Statistics.runtime:Ljava/lang/Runtime;
            invokevirtual java.lang.Runtime.freeMemory:()J
            lsub
            lstore 1 /* memoryNow */
        start local 1 // long memoryNow
         1: .line 507
            getstatic org.apache.fop.area.AreaTreeHandler.log:Lorg/apache/commons/logging/Log;
            new java.lang.StringBuilder
            dup
            ldc "Current heap size: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            lload 1 /* memoryNow */
            ldc 1024
            ldiv
            invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
            ldc "KB"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokeinterface org.apache.commons.logging.Log.debug:(Ljava/lang/Object;)V
         2: .line 508
            return
        end local 1 // long memoryNow
        end local 0 // org.apache.fop.area.AreaTreeHandler$Statistics this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    3     0       this  Lorg/apache/fop/area/AreaTreeHandler$Statistics;
            1    3     1  memoryNow  J

  protected void logResults();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=6, locals=12, args_size=1
        start local 0 // org.apache.fop.area.AreaTreeHandler$Statistics this
         0: .line 514
            aload 0 /* this */
            getfield org.apache.fop.area.AreaTreeHandler$Statistics.runtime:Ljava/lang/Runtime;
            invokevirtual java.lang.Runtime.totalMemory:()J
            aload 0 /* this */
            getfield org.apache.fop.area.AreaTreeHandler$Statistics.runtime:Ljava/lang/Runtime;
            invokevirtual java.lang.Runtime.freeMemory:()J
            lsub
            lstore 1 /* memoryNow */
        start local 1 // long memoryNow
         1: .line 515
            lload 1 /* memoryNow */
            aload 0 /* this */
            getfield org.apache.fop.area.AreaTreeHandler$Statistics.initialMemory:J
            lsub
            ldc 1024
            ldiv
            lstore 3 /* memoryUsed */
        start local 3 // long memoryUsed
         2: .line 516
            invokestatic java.lang.System.currentTimeMillis:()J
            aload 0 /* this */
            getfield org.apache.fop.area.AreaTreeHandler$Statistics.startTime:J
            lsub
            lstore 5 /* timeUsed */
        start local 5 // long timeUsed
         3: .line 517
            aload 0 /* this */
            getfield org.apache.fop.area.AreaTreeHandler$Statistics.this$0:Lorg/apache/fop/area/AreaTreeHandler;
            getfield org.apache.fop.area.AreaTreeHandler.rootFObj:Lorg/apache/fop/fo/pagination/Root;
            invokevirtual org.apache.fop.fo.pagination.Root.getTotalPagesGenerated:()I
            istore 7 /* pageCount */
        start local 7 // int pageCount
         4: .line 518
            getstatic org.apache.fop.area.AreaTreeHandler.log:Lorg/apache/commons/logging/Log;
            new java.lang.StringBuilder
            dup
            ldc "Initial heap size: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield org.apache.fop.area.AreaTreeHandler$Statistics.initialMemory:J
            ldc 1024
            ldiv
            invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
            ldc "KB"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokeinterface org.apache.commons.logging.Log.debug:(Ljava/lang/Object;)V
         5: .line 519
            getstatic org.apache.fop.area.AreaTreeHandler.log:Lorg/apache/commons/logging/Log;
            new java.lang.StringBuilder
            dup
            ldc "Current heap size: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            lload 1 /* memoryNow */
            ldc 1024
            ldiv
            invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
            ldc "KB"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokeinterface org.apache.commons.logging.Log.debug:(Ljava/lang/Object;)V
         6: .line 520
            getstatic org.apache.fop.area.AreaTreeHandler.log:Lorg/apache/commons/logging/Log;
            new java.lang.StringBuilder
            dup
            ldc "Total memory used: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            lload 3 /* memoryUsed */
            invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
            ldc "KB"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokeinterface org.apache.commons.logging.Log.debug:(Ljava/lang/Object;)V
         7: .line 521
            getstatic org.apache.fop.area.AreaTreeHandler.log:Lorg/apache/commons/logging/Log;
            new java.lang.StringBuilder
            dup
            ldc "Total time used: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            lload 5 /* timeUsed */
            invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
            ldc "ms"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokeinterface org.apache.commons.logging.Log.debug:(Ljava/lang/Object;)V
         8: .line 522
            getstatic org.apache.fop.area.AreaTreeHandler.log:Lorg/apache/commons/logging/Log;
            new java.lang.StringBuilder
            dup
            ldc "Pages rendered: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            iload 7 /* pageCount */
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokeinterface org.apache.commons.logging.Log.debug:(Ljava/lang/Object;)V
         9: .line 523
            iload 7 /* pageCount */
            ifle 18
        10: .line 524
            lload 5 /* timeUsed */
            iload 7 /* pageCount */
            i2l
            ldiv
            lstore 8 /* perPage */
        start local 8 // long perPage
        11: .line 525
            lload 5 /* timeUsed */
            lconst_0
            lcmp
            ifeq 15
            ldc 60000
            iload 7 /* pageCount */
            imul
            i2d
        12: .line 526
            lload 5 /* timeUsed */
            l2d
            ddiv
        13: .line 525
            invokestatic java.lang.Math.round:(D)J
        14: .line 526
            goto 16
      StackMap locals: org.apache.fop.area.AreaTreeHandler$Statistics long long long int long
      StackMap stack:
        15: ldc -1
        16: .line 525
      StackMap locals:
      StackMap stack: long
            lstore 10 /* ppm */
        start local 10 // long ppm
        17: .line 527
            getstatic org.apache.fop.area.AreaTreeHandler.log:Lorg/apache/commons/logging/Log;
            new java.lang.StringBuilder
            dup
            ldc "Avg render time: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            lload 8 /* perPage */
            invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
            ldc "ms/page ("
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            lload 10 /* ppm */
            invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
            ldc "pages/min)"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokeinterface org.apache.commons.logging.Log.debug:(Ljava/lang/Object;)V
        end local 10 // long ppm
        end local 8 // long perPage
        18: .line 529
      StackMap locals:
      StackMap stack:
            return
        end local 7 // int pageCount
        end local 5 // long timeUsed
        end local 3 // long memoryUsed
        end local 1 // long memoryNow
        end local 0 // org.apache.fop.area.AreaTreeHandler$Statistics this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0   19     0        this  Lorg/apache/fop/area/AreaTreeHandler$Statistics;
            1   19     1   memoryNow  J
            2   19     3  memoryUsed  J
            3   19     5    timeUsed  J
            4   19     7   pageCount  I
           11   18     8     perPage  J
           17   18    10         ppm  J
}
SourceFile: "AreaTreeHandler.java"
NestHost: org.apache.fop.area.AreaTreeHandler
InnerClasses:
  private Statistics = org.apache.fop.area.AreaTreeHandler$Statistics of org.apache.fop.area.AreaTreeHandler