Starting Katalon tests takes a very long time

Web Testing
1

Hi,

Recently, manually running tests has been taking a very long time to start. Specifically, I click “Play” in any test, the job progress opens, the spinning circle appears, but then sometimes nothing happens for 10-20 seconds. The log viewer remains blank. Has anyone else experienced this or know of a possible solution?

Katalon Studio is currently running version 10.4.2.

1 Like
2

hi @manuel.rolle

please make sure that you are using the latest version of the webdriver by updating it

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Any errors ? can you share the logs?

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Recommended Solutions

Solution 1: Check Execution Settings

Source: Execution Settings in Katalon Studio

Verify your execution settings are optimized:

  • Go to Project > Settings > Execution

  • Check Delay between actions is set to 0 (unless intentionally configured)

  • Ensure Default wait for element timeout is reasonable (default: 30 seconds)

  • Disable unnecessary features like Smart Wait if not needed

Solution 2: Monitor System Resources

Check if your system is resource-constrained:

  • Monitor CPU, RAM, and disk usage during test startup

  • Close unnecessary applications

  • Ensure sufficient free disk space

Solution 3: Clear Cache and Rebuild

Try clearing Katalon’s cache:

  • Close Katalon Studio

  • Delete the

    .katalon

    cache folder in your project directory

  • Restart Katalon Studio and retry

Solution 4: Check Log Properties

Source: View and Customize Execution Log

Verify logging isn’t causing delays:

  • Check

    Include > Config > log.properties

    file

  • Ensure logging level is not set to TRACE (which can slow startup)

1 Like
5

In Katalon Studio, go to Help > Error Log to open the .log file.

In the .log file, you may find some important diagnostics.

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Hi, first of all, thank you so much for the quick and numerous replies. I’ll try to address everything in one answer and hope I don’t forget anything.

@depapp: The web drivers are up to date.

@dineshh: No, there are no error messages, at least not in the log viewer.

@Monty_Bagati:

Solution 1: It’s already configured that way. The slow startup issue has only been occurring for a while. I can’t say for sure whether it coincides with the last update or started before or after.

Solution 2: Resource usage and available memory are not possible causes. The processor is running at 5-20% during the test, RAM is only 41% utilized, and over 25% of the SSD storage is still free.

Solution 3: I can’t find the .katalon folder in my project directory.

Solution 4: I’ll have to take a closer look.

@kazurayam: The logs only contain entries indicating that a Jira plugin is online, “Reloaded plugins successfully,” and “Finished preloading.”

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7

In case that some problem resides in the layer of Eclipse Platform upon which Katalon Studio application runs, then you would see what you wrote:

… I click “Play” in any test, the job progress opens, the spinning circle appears, but then sometimes nothing happens for 10-20 seconds.

How about removing the Katalon Studio installation from your PC once; and reinstall it cleanly? That may change something unknown for you. Cleanup & reinstall the product woud be the only remedy you can try.

1 Like
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I am not very much surprised to hear 10-20 seconds of idleness of Katalon Studio. It happens.

I have ever done a performance mesurement of the various versions of Katalon Studio where I found Katalon Studio v10 runs far slower than v9. See my report as follows:

and this:

It would worth trying to run Katalon Studio on another machine; preferably Mac, not Windows.