What happens when a user opens and app ? How to improve performance

[alexish]

Hi everyone,

I'm not sure it's the proper board for such question, feel free to redirect me where appropriate.

We are having an application that is pretty slow to open for users.
I order to tackle this issue, i'm trying to understand first what happens exactly when a user opens an app from the hub (or a mashup).

I've not found anything else while looking through google, but maybe there are existing ressources ?

From my understanding :

• When reloading the application, Qlik runs through the script and make all calculations & prepare the full tables.
  • In this step, simplifying the datamodel and precalculating could make quicker loading times.
• Whe a user opens the app, Qlik runs through the Section Access, and loads the part the user can see. I assume no other calculations are performed.
  • How to improve here ?
• When the user is on the app, the charts are loaded, and in app calculations are performed.
  • Here, we can improve performance by reducing/simplifying calculations, or having less data.

Can you please let me know what happens, and how to improve ?

Thanks a lot

[abhijitnalekar]

Hi @alexish ,

Please go through with below link.

https://help.qlik.com/en-US/sense/May2021/Subsystems/Hub/Content/Sense_Hub/Apps/app-performance.htm

[PrashantSangle]

check below articles on optimization.

1: https://predoole.com/2020/09/08/9-ways-to-optimize-qlik-performance-part-1-backend-layer/

2: https://predoole.com/2020/09/16/ways-to-optimize-qlik-performance-part-2-front-end-layer/

Regards,

Prashant Sangle

[alexish]

Thanks for your answer.

I will look into some of those suggestions.
However, this does not answer my 1st question : do you know exactly what happens when a user opens the app ? What is taking time ?