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package io.quarkiverse.langchain4j.llama3.copy;

import java.util.concurrent.TimeUnit;

public interface Timer extends AutoCloseable {
    @Override
    void close(); // no Exception

    static Timer log(String label) {
        return log(label, TimeUnit.MILLISECONDS);
    }

    static Timer log(String label, TimeUnit timeUnit) {
        return new Timer() {
            final long startNanos = System.nanoTime();

            @Override
            public void close() {
                long elapsedNanos = System.nanoTime() - startNanos;
                System.err.println(label + ": "
                        + timeUnit.convert(elapsedNanos, TimeUnit.NANOSECONDS) + " "
                        + timeUnit.toChronoUnit().name().toLowerCase());
            }
        };
    }
}