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perf: use StringBuffer in Java HTTP API 

by chenjiaqi
This commit is contained in:
magicpanda0618 2017-08-09 15:43:27 +08:00
parent aab8cb36c7
commit 286faa354f
1 changed files with 5 additions and 4 deletions
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9
api/http/java/src/jgsc/GstoreConnector.java
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@ -2,6 +2,7 @@ package jgsc;
import java.io.*; import java.io.*;
import java.net.*; import java.net.*;
import java.lang.*;
import java.net.URLEncoder; import java.net.URLEncoder;
import java.net.URLDecoder; import java.net.URLDecoder;
import java.io.UnsupportedEncodingException; import java.io.UnsupportedEncodingException;
@ -37,7 +38,7 @@ public class GstoreConnector {
//this may help to reduce the GC cost //this may help to reduce the GC cost
public String sendGet(String param) { public String sendGet(String param) {
String url = "http://" + this.serverIP + ":" + this.serverPort; String url = "http://" + this.serverIP + ":" + this.serverPort;
String result = ""; StringBuffer result = new StringBuffer();
BufferedReader in = null; BufferedReader in = null;
System.out.println("parameter: "+param); System.out.println("parameter: "+param);
@ -50,7 +51,7 @@ public class GstoreConnector {
try { try {
String urlNameString = url + "/" + param; String urlNameString = url + "/" + param;
System.out.println("request: "+urlNameString); System.out.println("request: "+urlNameString);
URL realUrl = new URL(urlNameString); URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接 // 打开和URL之间的连接
URLConnection connection = realUrl.openConnection(); URLConnection connection = realUrl.openConnection();
@ -82,7 +83,7 @@ public class GstoreConnector {
while ((line = in.readLine()) != null) { while ((line = in.readLine()) != null) {
//PERFORMANCE: this can be very costly if result is very large, because many temporary Strings are produced //PERFORMANCE: this can be very costly if result is very large, because many temporary Strings are produced
//In this case, just print the line directly will be much faster //In this case, just print the line directly will be much faster
result += line; result.append(line);
//System.out.println("get data size: " + line.length()); //System.out.println("get data size: " + line.length());
//System.out.println(line); //System.out.println(line);
} }
@ -103,7 +104,7 @@ public class GstoreConnector {
e2.printStackTrace(); e2.printStackTrace();
} }
} }
return result; return result.toString();
} }
//NOTICE: no need to connect now, HTTP connection is kept by default //NOTICE: no need to connect now, HTTP connection is kept by default