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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.streamingvisitors.tracing;
/**
* Clock which returns a monotonically increasing timestamp from an undefined epoch.
* The epoch is guaranteed to be stable within a single JVM execution, but not across
* processes. Should therefore only be used for relative duration tracking, not absolute
* wall clock time events.
*/
@FunctionalInterface
public interface MonotonicNanoClock {
long nanoTimeNow();
}
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