java - Reading inputStream using BufferedReader.readLine() is too slow

Question

I am using following code.

BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line = null;

StringBuilder responseData = new StringBuilder();
while((line = in.readLine()) != null) {
    responseData.append(line);
}

But it is taking more than 12 sec to read 200 line.

Please help

question from:https://stackoverflow.com/questions/5594725/reading-inputstream-using-bufferedreader-readline-is-too-slow

Answer 1

I strongly suspect that's because of the network connection or the web server you're talking to - it's not BufferedReader's fault. Try measuring this:

InputStream stream = conn.getInputStream();
byte[] buffer = new byte[1000];
// Start timing
while (stream.read(buffer) > 0)
{
}
// End timing

I think you'll find it's almost exactly the same time as when you're parsing the text.

Note that you should also give InputStreamReader an appropriate encoding - the platform default encoding is almost certainly not what you should be using.