return isRunning ? ticker.read() - startTick + elapsedNanos : elapsedNanos;
  }

  /**
   * Returns the current elapsed time shown on this stopwatch, expressed in the desired time unit,
   * with any fraction rounded down.
   *
   * <p><b>Note:</b> the overhead of measurement can be more than a microsecond, so it is generally
   * not useful to specify {@link TimeUnit#NANOSECONDS} precision here.
   *

    // Play it back.
    val connection = connect(peer)
    val pingAtNanos = System.nanoTime()
    connection.writePingAndAwaitPong()
    val elapsedNanos = System.nanoTime() - pingAtNanos
    assertThat(elapsedNanos).isGreaterThan(0L)
    assertThat(elapsedNanos).isLessThan(TimeUnit.SECONDS.toNanos(1))

    // Verify the peer received what was expected.
    val pingFrame = peer.takeFrame()

    private void printEvent(String name) {
      long nowNanos = System.nanoTime();
      if (name.equals("callStart")) {
        callStartNanos = nowNanos;
      }
      long elapsedNanos = nowNanos - callStartNanos;
      System.out.printf("%.3f %s%n", elapsedNanos / 1000000000d, name);
    }

    @Override public void callStart(Call call) {
      printEvent("callStart");
    }

  private void printEvent(String name) {
    long nowNanos = System.nanoTime();
    if (name.equals("callStart")) {
      callStartNanos = nowNanos;
    }
    long elapsedNanos = nowNanos - callStartNanos;
    System.out.printf("%.3f %s%n", elapsedNanos / 1000000000d, name);
  }

  @Override public void callStart(Call call) {
    printEvent("callStart");
  }

  @Override public void callEnd(Call call) {

    val inputStream = connection.getInputStream()
    assertThat(inputStream.read()).isEqualTo(-1)
    val elapsedNanos = System.nanoTime() - startNanos
    val elapsedMillis = TimeUnit.NANOSECONDS.toMillis(elapsedNanos)
    assertThat(elapsedMillis).isBetween(500L, 1000L)
  }

  /**
   * Throttle the response body by sleeping 500ms after every 3 bytes. With a 6-byte response, this

    connection.getOutputStream().write("ABCDEF".toByteArray(UTF_8))
    val inputStream = connection.getInputStream()
    assertThat(inputStream.read()).isEqualTo(-1)
    val elapsedNanos = System.nanoTime() - startNanos
    val elapsedMillis = TimeUnit.NANOSECONDS.toMillis(elapsedNanos)
    assertThat(elapsedMillis).isBetween(500L, 1000L)
  }

  /**
   * Throttle the response body by sleeping 500ms after every 3 bytes. With a 6-byte response, this

      this.callId = callId;
      this.callStartNanos = callStartNanos;
    }

    private void printEvent(String name) {
      long elapsedNanos = System.nanoTime() - callStartNanos;
      System.out.printf("%04d %.3f %s%n", callId, elapsedNanos / 1000000000d, name);
    }

    @Override public void proxySelectStart(Call call, HttpUrl url) {
      printEvent("proxySelectStart");
    }

    assertFailsWith<SocketTimeoutException> {
      call.execute()
    }
    val elapsedNanos = System.nanoTime() - startNanos
    org.junit.jupiter.api.Assertions.assertTrue(
      elapsedNanos < TimeUnit.SECONDS.toNanos(5),
      "Timeout should have taken ~100ms but was " + elapsedNanos / 1e6 + " ms",
    )
  }

  @Test
  fun chainWithReadTimeout() {
    val interceptor1 =

    bodySource.use {
      assertFailsWith<IOException> {
        bodySource.readByte()
      }.also { expected ->
        // Timed out as expected.
        val elapsedNanos = System.nanoTime() - startNanos
        val elapsedMillis = TimeUnit.NANOSECONDS.toMillis(elapsedNanos)
        assertThat(elapsedMillis).isLessThan(500)
      }
    }
  }

  /** https://github.com/square/okhttp/issues/442  */
  @Test

        }
        statsCounter.recordLoadSuccess(loadingValueReference.elapsedNanos());
        storeLoadedValue(key, hash, loadingValueReference, value);
        return value;
      } finally {
        if (value == null) {
          statsCounter.recordLoadException(loadingValueReference.elapsedNanos());
          removeLoadingValue(key, hash, loadingValueReference);
        }
      }
    }