topic Re: What happens when a user opens and app ? How to improve performance in App Development

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

alexish — Tue, 28 Sep 2021 11:17:28 GMT

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

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

abhijitnalekar — Tue, 28 Sep 2021 11:54:47 GMT

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

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

PrashantSangle — Tue, 28 Sep 2021 12:00:37 GMT

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

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

alexish — Tue, 28 Sep 2021 12:02:13 GMT

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 ?