IE 10 still have the same problem.

prefix post reference : https://forum.katalon.com/discussion/6906

As you answered,
I added it to IE Trusted sites and tried again,
but the same problem still exists.

And TC performance is so slow that it can not be applied to automation testing.
(Click, Focus Event may take at least 23 seconds or more to get out of time)

here, Test Environment Spec
OS : Windows 7 Professional K Service Pack 1
CPU : Intel I5-6300HQ @ 2.30Ghz
RAM : 8.00GB DDR4
IE Version : 10.0.9200.17609

Katalon Studio

Version: 5.4.1

Build: 1

Thx for reading

I was able to resolve instances of extremely poor Test Script “Playback” performance by IE Browsers using the following method…

Open “Windows Task Manager” and on the “Processes” tab to see if there are multiple entries for IEDriverServer.exe. If so, for each one that is listed, select the entry and click the “End Process” button…

David Edmondson said:

I was able to resolve instances of extremely poor Test Script “Playback” performance by IE Browsers using the following method…

Open “Windows Task Manager” and on the “Processes” tab to see if there are multiple entries for IEDriverServer.exe. If so, for each one that is listed, select the entry and click the “End Process” button…

thx for tips
i try that’s solution