240678 - Mozilla 1.7b (and Firefox 0.8) is busy waiting on synchronous xmlhttprequest

Status: RESOLVED DUPLICATE of bug 190313

(Core :: XML, defect)

Description

[Lars Hofhansl]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7b) Gecko/20040316
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7b) Gecko/20040316

When using synchronous xmlhttprequest, both Mozilla 1.7b on Linux, and Firefox
0.8 on Windows 2000 use 100% CPU time while waiting for the server.

If xmlhttprequest is used asynchronously (using the onload callback) no extra
CPU time is used.


Reproducible: Always
Steps to Reproduce:
This is the code used:

   var httpReq = new XMLHttpRequest();
   httpReq.open("POST", "<server URL>", false, null, null);
   httpReq.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
   httpReq.send( "something" );

Actual Results:  
Mozilla uses 100% CPU while waiting for the server.

Expected Results:  
Waiting should use no CPU time.

Comment 1

[Boris Zbarsky [:bzbarsky]]

*** This bug has been marked as a duplicate of 190313 ***