The results are very pretty, however, it would be useful to have a running test case. Some benefits are:

1) would provide backup proof to the claim that XHR is faster.
2) would allow Mozilla engineers ability to investigate.
3) relevant for developers who want to make decisions.

Can you please post up the test itself?

Thank you,

Garrett

Can you provide a testcase that the rest of us can see and run?

It would be useful to actually have a running test in the browser, for proof.

Thank you,

Garrett

Great article have you wrotten Emil. But by now, i do have a question about your testing case, specially at Firefox browser: I have trying to make a synchronous post request to server side - using XMLHTTPRequest object -, but at this browser, it is bugy, as a have looking at the web and found some information on Bugzilla site [bug id 313646]. So, how do you passthru this issue?

Best regards,

Fernando

/**

* Reads a file storing intermediate data into an array.

* @param file the file to be read

* @return a file data

*/

public byte[] read2array(String file) throws Exception {

InputStream in = null;

byte[] out = new byte[0];

try{

in = new BufferedInputStream(new FileInputStream(file));

// the length of a buffer can vary

int bufLen = 20000*1024;

byte[] buf = new byte[bufLen];

byte[] tmp = null;

int len = 0;

while((len = in.read(buf,0,bufLen)) != -1){

// extend array

tmp = new byte[out.length + len];

// copy data

System.arraycopy(out,0,tmp,0,out.length);

System.arraycopy(buf,0,tmp,out.length,len);

out = tmp;

tmp = null;

}

}finally{

// always close the stream

if (in != null) try{ in.close();}catch (Exception e){}

}

return out;

}

I ask because if there is overlap, that would defeat caching and that would explain IE appearing to cache only synchronous requests.

Even if you wait for readyState == 4, maybe IE takes a short time to commit the received file to cache. Adding a fixed time delay after readyState == 4 would check for that.

never tested with such scripts, but surely would be interseted in having them and runnning on my programs.

Thanks in advance.

~Shaurabh Bharti