Example usage for java.lang System nanoTime

Introduction

In this page you can find the example usage for java.lang System nanoTime.

Prototype

@HotSpotIntrinsicCandidate
public static native long nanoTime();

Source Link

Document

Returns the current value of the running Java Virtual Machine's high-resolution time source, in nanoseconds.

Usage

From source file:edu.ucsf.valelab.saim.calculations.BenchmarkCalculations.java

/**
 * Compares two methods to calculate the Saim function
 * The implementation not using Complex numbers appears to be at least
 * 10 times faster/* w ww.j a va 2 s.  c  om*/
 * @throws Exception 
 */
public void test() throws Exception {

    long nrRuns = 100000000;

    double wavelength = 488.0;
    double nSample = 1.36;
    double dOx = 500.0;
    double h = 16.0;

    double angle = Math.toRadians(0.0);
    SaimFunction sf = new SaimFunction(wavelength, dOx, nSample, false);
    Complex rTE = sf.getFresnelTE(0);
    double f = 4.0 * Math.PI * nSample * Math.cos(angle) / wavelength;
    double phaseDiff = f * h;

    // method 1
    long startTime = System.nanoTime();
    double c = rTE.getReal();
    double d = rTE.getImaginary();
    for (int i = 0; i < nrRuns; i++) {
        double val = 1 + 2 * c * Math.cos(phaseDiff) - 2 * d * Math.sin(phaseDiff) + c * c + d * d;
    }
    long endTime = System.nanoTime();
    long took = endTime - startTime;
    System.out.println("First method: " + nrRuns + " runs took: " + took / 1000000 + " milliseconds");

    // method 2
    startTime = System.nanoTime();
    for (int i = 0; i < nrRuns; i++) {
        Complex tmp = new Complex(Math.cos(phaseDiff), Math.sin(phaseDiff));
        Complex fieldStrength = rTE.multiply(tmp);
        fieldStrength = fieldStrength.add(1.0);
        // square of absolute 
        double val = fieldStrength.getReal() * fieldStrength.getReal()
                + fieldStrength.getImaginary() * fieldStrength.getImaginary();
    }
    endTime = System.nanoTime();
    took = endTime - startTime;
    System.out.println("Second method: " + nrRuns + " runs took: " + took / 1000000 + " milliseconds");

}

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From source file:org.commonjava.indy.ftest.core.content.SetContentTypeFromUpstreamIfExistsTest.java

@Test
public void run() throws Exception {
    final String content = "This is some content " + System.currentTimeMillis() + "." + System.nanoTime();
    final String path = "org/foo/foo-project/1/foo-1.jar";

    server.expect("GET", server.formatUrl(STORE, path), (request, response) -> {
        response.setStatus(200);// w ww . j a  va  2 s. c  o m
        response.setHeader("Content-Length", Integer.toString(content.length()));
        response.setHeader("Content-Type", "application/java-archive; charset=UTF-8");
        PrintWriter writer = response.getWriter();

        writer.write(content);
    });

    client.stores().create(new RemoteRepository(STORE, server.formatUrl(STORE)), "adding remote",
            RemoteRepository.class);

    try (HttpResources httpResources = client.module(IndyRawHttpModule.class).getHttp()
            .getRaw(client.content().contentPath(remote, STORE, path))) {
        HttpResponse response = httpResources.getResponse();
        String contentType = response.getFirstHeader("Content-Type").getValue();
        assertThat(contentType, equalTo("application/java-archive;charset=UTF-8"));
    }
}

---

From source file:org.commonjava.indy.httprox.AutoCreateRepoAndRetrieveNoCacheFileTest.java

@Test
public void run() throws Exception {
    final String path = "org/foo/bar/1.0/bar-1.0.nocache";
    final String content = "This is a test: " + System.nanoTime();

    final String testRepo = "test";

    final String url = server.formatUrl(testRepo, path);

    server.expect(url, 200, content);//from   w  ww.  j a  v a2s  .  c om

    final HttpGet get = new HttpGet(url);
    CloseableHttpClient client = proxiedHttp();
    CloseableHttpResponse response = null;

    InputStream stream = null;
    try {
        response = client.execute(get, proxyContext(USER, PASS));
        stream = response.getEntity().getContent();
        final String resultingPom = IOUtils.toString(stream);

        assertThat(resultingPom, notNullValue());
        assertThat(resultingPom, equalTo(content));
    } finally {
        IOUtils.closeQuietly(stream);
        HttpResources.cleanupResources(get, response, client);
    }

    final RemoteRepository remoteRepo = this.client.stores().load(
            new StoreKey(GENERIC_PKG_KEY, StoreType.remote, "httprox_127-0-0-1_" + server.getPort()),
            RemoteRepository.class);

    assertThat(remoteRepo, notNullValue());
    assertThat(remoteRepo.getUrl(), equalTo(server.getBaseUri()));

    String pomUrl = this.client.content().contentUrl(remoteRepo.getKey(), testRepo, path) + "?cache-only=true";
    System.out.println("pomUrl:: " + pomUrl);

    HttpHead head = new HttpHead(pomUrl);
    client = HttpClients.createDefault();

    try {
        response = client.execute(head);
        assertThat(response.getStatusLine().getStatusCode(), equalTo(404));
    } finally {
        HttpResources.cleanupResources(head, response, client);
    }

}

---

From source file:com.alibaba.json.test.Bug_0_Test.java

private void f_ali_json() {
    long startNano = System.nanoTime();
    for (int i = 0; i < COUNT; ++i) {
        com.alibaba.fastjson.JSON.parse(text);
    }//from  w  ww  .ja v a  2 s. co m
    long nano = System.nanoTime() - startNano;
    System.out.println(NumberFormat.getInstance().format(nano));
}

---

From source file:com.app.util.SearchResultUtil.java

public static void performSearch() throws DatabaseConnectionException, SQLException {

    long startTime = System.nanoTime();

    ExecutorService executor = Executors.newFixedThreadPool(_THREAD_POOL_SIZE);

    List<Integer> userIds = UserUtil.getUserIds(true);

    for (int userId : userIds) {
        SearchResultRunnable searchResultRunnable = new SearchResultRunnable(userId);

        executor.execute(searchResultRunnable);
    }/* ww  w.j  a v  a 2 s . co m*/

    executor.shutdown();

    try {
        executor.awaitTermination(_THREAD_TIMEOUT_SECONDS, TimeUnit.SECONDS);
    } catch (InterruptedException ie) {
        _log.error("The executor encountered an exception", ie);
    }

    long endTime = System.nanoTime();

    _log.info("Performing searches for {} users took {} milliseconds", userIds.size(),
            (endTime - startTime) / 1000000);
}

---

From source file:com.longle1.facedetection.TimedAsyncHttpResponseHandler.java

@Override
public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
    Log.e("RTT", String.format("%.1f", (System.nanoTime() - startTime) / 1e6) + " ms");
    String msg = "RTT: " + String.format("%.1f", (System.nanoTime() - startTime) / 1e6) + " ms";
    Toast mToast = Toast.makeText(mContext, msg, Toast.LENGTH_SHORT);
    mToast.setGravity(Gravity.TOP, 0, 0);
    TextView v = (TextView) mToast.getView().findViewById(android.R.id.message);
    v.setTextColor(Color.RED);/*from  w  w  w.j  a  v a  2 s  .  co m*/
    mToast.show();
}

---

From source file:ch.algotrader.dao.HibernateInitializer.java

@Override
@SuppressWarnings("unchecked")
public <T extends BaseEntityI> T initializeProxy(BaseEntityI entity, String context, T proxy) {

    if (proxy instanceof HibernateProxy) {

        HibernateProxy hibernateProxy = (HibernateProxy) proxy;
        LazyInitializer initializer = hibernateProxy.getHibernateLazyInitializer();

        if (initializer.getSession() != null) {

            long before = System.nanoTime();
            proxy = (T) initializer.getImplementation();
            MetricsUtil.account(ClassUtils.getShortClassName(entity.getClass()) + context, (before));
        } else {//from  www.j av a2  s .  c om
            throw new IllegalStateException("no hibernate session available");
        }
    }

    return proxy;
}

---

From source file:net.openhft.chronicle.logger.log4j1.Log4j1VanillaChroniclePerfTest.java

@Test
public void testSingleThreadLogging1() throws IOException {
    Thread.currentThread().setName("perf-plain-vanilla");

    final String testId = "perf-binary-vanilla-chronicle";
    final Logger clogger = LoggerFactory.getLogger(testId);
    final Logger plogger = LoggerFactory.getLogger("perf-plain-vanilla");
    final long items = 1000000;

    warmup(clogger);/*w w  w.  ja v a 2s.  c o m*/
    warmup(plogger);

    for (int s = 64; s <= 1024; s += 64) {
        final String staticStr = StringUtils.leftPad("", s, 'X');

        long cStart1 = System.nanoTime();

        for (int i = 1; i <= items; i++) {
            clogger.info(staticStr);
        }

        long cEnd1 = System.nanoTime();

        long pStart1 = System.nanoTime();

        for (int i = 1; i <= items; i++) {
            plogger.info(staticStr);
        }

        long pEnd1 = System.nanoTime();

        System.out.printf(
                "items=%03d size=%04d => chronology=%.3f ms, chronology-average=%.3f us, plain=%d, plain-average=%.3f us\n",
                items, staticStr.length(), (cEnd1 - cStart1) / 1e6, (cEnd1 - cStart1) / items / 1e3,
                (pEnd1 - pStart1), (pEnd1 - pStart1) / items / 1e3);
    }

    IOTools.deleteDir(basePath(testId));
}

---

From source file:com.ss.language.model.gibblda.Dictionary.java

public Dictionary() {
    dicName = System.nanoTime() + "" + new Random().nextInt(20) + "_";
    init(LDACmdOption.curOption.get());
}

---

From source file:org.eigengo.rsa.text.v100.TextEntity.java

private TextEntityEvent.Ocred ocr(TextEntityCommand.Ocr ocr) {
    log.info("Performing OCR for {}", ocr.correlationId);
    return new TextEntityEvent.Ocred(entityId(), ocr.correlationId, ocr.ingestionTimestamp, System.nanoTime(),
            new String[] { "text" });
}

---

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