When parent window Minimized, it happen javascript executing and ActiveX control rendering hang.

Hi,

  When parent window Minimized, it happen javascript executing and ActiveX control rendering hang.

  I can always reproduce the terrible slow & hang case.

  Test environment below:

  1) Windows 7 x64  + IE8

  2) Windows 7 X64  + IE9

  Test Planing Step by Step:

   Step 1: It executed  window.open command to make child window  in parent window by using javascript code.

   Step 2: I manual control to Minimize parent window, then switch to child window(include ActiveX Control screen) to operate.

               The tragedy happened, test result below.

               In IE8 browser, javascript executing hang and also ActiveX control rendering freeze. it will slow over 10 times speed.

               In IE9 browser, javascript executing slight hang and also ActiveX control rendering a little freeze. it will slow over 5 times speed.

   Step 3: When Re-maximize parent window,then switch back child window to operate.

               Hallelujah~~~~~

               It  is magic!

              Suddenly,  javascript executing and ActiveX control rendering speed is working fine in IE8 or IE9 browser.


   What happened ?  i need to do hotfix or something else ? Or it is the persistent issue for internet explorer ?