Want to understand parallel execution is supported?
For your request, it's supported currently in Katalon Studio. You just need to execute your test script in 'Remote' execution and pass in the hub URL along with desired capabilities that you want in Project Settings. Please follow this documentation on how to use and configure 'Remote' execution:
For your information, in Katalon Studio, that 'number of threads' option is not available. We just provide an interface for users to pass in remote hub URL and capabilities, so every execution is considered as independent execution unless you execute the test script in parallel.
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