问题
I want to compare performances for the three implementations mentioned in the title, I wrote a little JAVA program to help me doing this. The main method contains three blocks of testing, each block looks like this :
nb=0; time=0;
for (int i = 0; i < 7; i++) {
double v = methodX(url);
if(v>0){
nb++;
time+=v;
}
}
if(nb==0) nb=1;
System.out.println("HttpClient : "+(time/ ((double) nb))+". Tries "+nb+"/7");
Variable nb is used to avoid failed requests. Now method methodX is one of :
private static double testWithNativeHUC(String url){
try {
HttpURLConnection httpURLConnection= (HttpURLConnection) new URL(url).openConnection();
httpURLConnection.addRequestProperty("User-Agent", UA);
long before = System.currentTimeMillis();
BufferedReader bufferedReader= new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream()));
while (bufferedReader.readLine()!=null);
return System.currentTimeMillis()-before;
} catch (IOException e) {
e.printStackTrace();
return -1;
}
}
private static double testWithHC(String url) {
try {
CloseableHttpClient httpClient = HttpClientBuilder.create().setUserAgent(UA).build();
BasicResponseHandler basicResponseHandler = new BasicResponseHandler();
long before = System.currentTimeMillis();
CloseableHttpResponse response = httpClient.execute(new HttpGet(url));
basicResponseHandler.handleResponse(response);
return System.currentTimeMillis() - before;
} catch (IOException e) {
e.printStackTrace();
return -1;
}
}
private static double testWithJsoup(String url){
try{
long before = System.currentTimeMillis();
Jsoup.connect(url).execute().parse();
return System.currentTimeMillis()-before;
}catch (IOException e){
e.printStackTrace();
return -1;
}
}
What I am getting as output is the following.
for url https://stackoverflow.com :
HttpUrlConnection : 325.85714285714283. Tries 7/7
HttpClient : 299.0. Tries 7/7
Jsoup : 172.42857142857142. Tries 7/7
for url https://online.vfsglobal.dz :
HttpUrlConnection : 104.57142857142857. Tries 7/7
HttpClient : 181.0. Tries 7/7
Jsoup : 57.857142857142854. Tries 7/7
for url https://google.com/ :
HttpUrlConnection : 251.28571428571428. Tries 7/7
HttpClient : 259.57142857142856. Tries 7/7
Jsoup : 299.85714285714283. Tries 7/7
for url https://algeria.blsspainvisa.com/book_appointment.php :
HttpUrlConnection : 112.57142857142857. Tries 7/7
HttpClient : 194.85714285714286. Tries 7/7
Jsoup : 67.42857142857143. Tries 7/7
for url https://tunisia.blsspainvisa.com/book_appointment.php :
HttpUrlConnection : 439.2857142857143. Tries 7/7
HttpClient : 283.42857142857144. Tries 7/7
Jsoup : 144.71428571428572. Tries 7/7
Even repeating tests gives same results, I didn't use a sleep time between requests to have rapid results, I believe it has no big impact on results.
EDIT In fact I analysed Jsoup's sources, it shows that it uses HttpURLConnection with BufferedInputStream, I've tried to use both in a HttpURLConnection fashion, but same results, as you can see, the difference is clear and Jsoup appears to be clearly faster than HttpURLConnection and it uses HttpURLConnection !
Thanks in advance,
回答1:
Your Benchmark is not meaningful.
I wrote a microbenchmark for this three libraries and got as result, that there is no significant difference.
Benchmark Mode Cnt Score Error Units
HttpBenchmark.httpClientGoogle avgt 2 151.162 ms/op
HttpBenchmark.httpClientStackoverflow avgt 2 151.086 ms/op
HttpBenchmark.httpUrlConnectionGoogle avgt 2 235.869 ms/op
HttpBenchmark.httpUrlConnectionStackoverflow avgt 2 145.162 ms/op
HttpBenchmark.jsoupGoogle avgt 2 391.162 ms/op
HttpBenchmark.jsoupStackoverflow avgt 2 188.059 ms/op
There are only one small difference between your tests and mine:
- JSoup set header "Accept-Encoding", "gzip" this will reduce bandwidth
- JSoup uses an bigger buffer (32kb)
- Reuse HttpClient is needed
In my tests JSoup is the slowest. Of course only JSoup parses the response.
My Benchmark:
@Warmup(iterations = 1, time = 3, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 2, time = 5, timeUnit = TimeUnit.SECONDS)
@Fork(1)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@Threads(1)
public class HttpBenchmark {
private static final String GOOGLE = "https://google.com/";
private static final String STACKOVERFLOW = "https://stackoverflow.com";
private final CloseableHttpClient httpClient = HttpClientBuilder.create().build();
@Benchmark
public void httpClientGoogle() throws Exception {
httpClient(GOOGLE);
}
@Benchmark
public void httpClientStackoverflow() throws Exception {
httpClient(STACKOVERFLOW);
}
@Benchmark
public void httpUrlConnectionGoogle() throws Exception {
httpUrlConnection(GOOGLE);
}
@Benchmark
public void httpUrlConnectionStackoverflow() throws Exception {
httpUrlConnection(STACKOVERFLOW);
}
@Benchmark
public void jsoupGoogle() throws Exception {
jsoup(GOOGLE);
}
@Benchmark
public void jsoupStackoverflow() throws Exception {
jsoup(STACKOVERFLOW);
}
private void httpClient(final String url) throws Exception {
final CloseableHttpResponse response = httpClient.execute(new HttpGet(url));
final BasicResponseHandler basicResponseHandler = new BasicResponseHandler();
basicResponseHandler.handleResponse(response);
response.close();
}
private void httpUrlConnection(final String url) throws Exception {
final HttpURLConnection httpURLConnection = (HttpURLConnection) new URL(url).openConnection();
httpURLConnection.addRequestProperty("Accept-Encoding", "gzip");
try (final BufferedInputStream r = new BufferedInputStream(httpURLConnection.getInputStream())) {
final byte[] tmp = new byte[1024 * 32];
int read;
while (true) {
read = r.read(tmp);
if (read == -1) {
break;
}
}
}
}
private void jsoup(final String url) throws Exception {
Jsoup.connect(url).execute().parse();
}
}
来源：https://stackoverflow.com/questions/60008305/what-makes-jsoup-faster-than-httpurlconnection-httpclient-in-most-cases