Package org.agrona.concurrent

Class HighResolutionClock

java.lang.Object
org.agrona.concurrent.HighResolutionClock
public final class HighResolutionClock extends Object
Clock that provides the number of time units since the 1 Jan 1970 UTC.

This implementation may be replaced on some platforms for greater performance.

Note: The actual provided resolution may be a higher granularity than the possible precision. For example, on Java 8 many JVMs will only advance a millisecond per tick so when requesting micros or nanos then the returned time may be a multiple of milliseconds. Later JVMs tend to improve on this.

  • Method Details

    • epochMillis

      public static long epochMillis()
      The number of milliseconds since the 1 Jan 1970 UTC.
      Returns:
      the number of milliseconds since the 1 Jan 1970 UTC.

    • epochMicros

      public static long epochMicros()
      The number of microseconds since the 1 Jan 1970 UTC.
      Returns:
      the number of microseconds since the 1 Jan 1970 UTC.

    • epochNanos

      public static long epochNanos()
      The number of nanoseconds since the 1 Jan 1970 UTC.

      Precision depends upon the JVM version used. Hotspot/OpenJDK 8 provides millisecond level precision, 11 provides microsecond or lower granularity.

      Returns:
      the number of nanoseconds since the 1 Jan 1970 UTC.