فشرده سازی json

این کد هم آپدیت کردم ولی بازهم سرعت پایینه

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.zip.GZIPInputStream;  //jpcode
import android.util.Log;

public class JSONParser {

	static InputStream is = null;
	static JSONObject jObj = null;
	static String json = "";

	// constructor
	public JSONParser() {

	}

	// function get json from url
		// by making HTTP POST or GET mehtod
		public JSONObject makeHttpRequest(String url, String method,
				List<NameValuePair> params) {

			// Making HTTP request
			try {
				
				// check for request method
				if(method == "POST"){
					// request method is POST
					// defaultHttpClient
					DefaultHttpClient httpClient = new DefaultHttpClient();
					HttpPost httpPost = new HttpPost(url);
					httpPost.setEntity(new UrlEncodedFormEntity(params, "utf-8"));

					HttpResponse httpResponse = httpClient.execute(httpPost);
					HttpEntity httpEntity = httpResponse.getEntity();
					is = httpEntity.getContent();
					
				}else if(method == "GET"){
					// request method is GET
					DefaultHttpClient httpClient = new DefaultHttpClient();
					String paramString = URLEncodedUtils.format(params, "utf-8");
					url += "?" + paramString;
					HttpGet httpGet = new HttpGet(url);
					httpGet.setHeader("Accept", "application/json");  //jpcode adding gzip
					httpGet.setHeader("Accept-Encoding", "gzip"); //jpcode adding gzip

					HttpResponse httpResponse = httpClient.execute(httpGet);
					HttpEntity httpEntity = httpResponse.getEntity();
					is = httpEntity.getContent();
					Log.d("JSON", is+"");
					is = new GZIPInputStream(is); //jpcode adding gzip
					// convert content stream to a String
					Log.d("JSON", is+"");
					//is.close();
					
				}			
				

			} catch (UnsupportedEncodingException e) {
				e.printStackTrace();
			} catch (ClientProtocolException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}

			try {
				//BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
				BufferedReader reader = new BufferedReader(new InputStreamReader(is, "utf-8"), 8);
				StringBuilder sb = new StringBuilder();
				String line = null;
				while ((line = reader.readLine()) != null) {
					sb.append(line + "\n");
				}
				is.close();
				
				json = sb.toString();
				
			} catch (Exception e) {
				Log.e("Buffer Error", "Error converting result " + e.toString());
			}

			// try parse the string to a JSON object
			try {
				jObj = new JSONObject(json);
			} catch (JSONException e) {
				Log.e("JSON Parser", "Error parsing data " + e.toString());
			}

			// return JSON String
			return jObj;

		}
	}