# API Response Time Higher in Katalon Compared to Postman

**URL:** <https://forum.katalon.com/t/api-response-time-higher-in-katalon-compared-to-postman/190006>\
**Category:** Web Testing\
**Tags:** api-testing\
**Created:** [April 13, 2026, 11:36am UTC](https://forum.katalon.com/t/api-response-time-higher-in-katalon-compared-to-postman/190006 "2026-04-13T11:36:21Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![kazurayam](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/kazurayam/32/333_2.png) [@kazurayam](https://forum.katalon.com/u/kazurayam)\
**Post date:** [April 13, 2026, 1:00pm UTC](https://forum.katalon.com/t/api-response-time-higher-in-katalon-compared-to-postman/190006/8 "2026-04-13T13:00:48Z")

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I think, the API testing feature of Katalon Studio is bogus. Let me show you an example, see

> [@Web service : save response as PDF file](https://forum.katalon.com/t/web-service-save-response-as-pdf-file/149208/2):
>
> In the \<KatalonStudioInstallationDirectory\>/Contents/Eclipse/configuration/resources/source directory, you can find the source codes of Katalon Studio. In the com.kms.katalon.core/com.kms.katalon.core-sources.ja of v9.0.0, I could find the source of com.kms.katalon.core.testobject.ResponseObject class. Here I quote the source of getResponseBodyContent() method, as follows: /\*\* \* Get the response body content as a String \* \* @return the response body content as a String …

It does not support any binary data in the HTTP response: such as images, pdf, xlsx, zip, tar, mp4, etc. It naively assumes that a HTTP response carries text only (json, xml, text/plain). Terrible, isn’t it.

As far as I see, Katalon is no longer investing their human resources into the API testing features. AI would not cure the poor implementation of the product. I would expect no improvement in future.

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