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Debugging slow document previews

  • September 11, 2025
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Hello Community

I am currently working on debugging a slow “preview document” response and am not sure where to look for a root cause.

I have a development server running on Azure and an acceptance server running locally on IIS. 

Azure server
IIS Server

The azure response time is like 6 seconds while the IIS takes a minute. I am currently considering the following root causes:

  • Some IIS setting is not set/optimalised 
  • The machine the IIS is running on is not powerfull enough
  • Some firewall is scanning the document 

I am however struggling to pinpoint the issue since the indicium and iis logs (inetpub → logs) dont show anything. Do you have any ideas?

Best answer by Anne Vries

As it turns out its not a document upload feature. But a devexpress generate document feature. Which gives me the opportunity to debug a potentially slow query. 

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  • Anne Vries
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  • Partner
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  • September 16, 2025

As it turns out its not a document upload feature. But a devexpress generate document feature. Which gives me the opportunity to debug a potentially slow query. 

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