http://metrics.dropwizard.io/metrics-core: Metrics is a Java library which gives you unparalleled insight into what your code does in production. Metrics provides a powerful toolkit of ways to measure the behavior of critical components in your production environment.
  • Coda Hale
  • Ryan Tenney
  • Artem Prigoda 
public class com.codahale.metrics.Clock$UserTimeClock extends com.codahale.metrics.Clock
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: com.codahale.metrics.Clock$UserTimeClock
  super_class: com.codahale.metrics.Clock
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.codahale.metrics.Clock$UserTimeClock this
         0: .line 36
            aload 0 /* this */
            invokespecial com.codahale.metrics.Clock.<init>:()V
            return
        end local 0 // com.codahale.metrics.Clock$UserTimeClock this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/codahale/metrics/Clock$UserTimeClock;

  public long getTick();
    descriptor: ()J
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.codahale.metrics.Clock$UserTimeClock this
         0: .line 39
            invokestatic java.lang.System.nanoTime:()J
            lreturn
        end local 0 // com.codahale.metrics.Clock$UserTimeClock this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/codahale/metrics/Clock$UserTimeClock;
}
SourceFile: "Clock.java"
NestHost: com.codahale.metrics.Clock
InnerClasses:
  public UserTimeClock = com.codahale.metrics.Clock$UserTimeClock of com.codahale.metrics.Clock