Tablet Client way faster than normal WebClient, BC25.1 OnPrem

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Posted on by Badaboom

Since a long time we have the issue of the slowness of the Webclient.
But its not a SQL or Network Issue...

Example:

When we are opening the Sales Order Card Page its like instant within the Tablet Client (1-2seconds) while it always takes about 6-9 seconds within the webclient (same service, same order).

Why is that the case?

I'm executing the statement directly on the server which is running the application service.

I just developed some Messages to see when the code was run on the service and actually shown

17-02-25 14.05.40,263 BeforeRunmodal Sales List - Trigger Action OpenSalesOrderTestCard

17-02-25 14.05.40,263 OnInit Sales Order card
17-02-25 14.05.40,296 OnOpenPage Sales Order card
17-02-25 14.05.40,323 OnAfterGetRecord Sales Order card

The Message tells me that on 2:05,40 pm the execution was done on the application server, but shown is the Page with the values 3-6 seconds later.

But as I am directly on the service there isn't any delay in the network. Is it all due to build up the page within the browser? And why is it way slower than on the tablet client?

Do you have any idea what could cause this? Or any options I can try to change?

pageextension 55393 SalesOrderTestListExtension extends "Sales Order List"
*****                
trigger OnAction()
                var
                    SalesOrderTestCard: Page SalesOrderTestCard;
                begin
                    Message('%1', Format(CurrentDateTime, 0, '<Day,2>-<Month,2>-<Year> <Hours24,2>.<Minutes,2>.<Seconds,2><Second dec>') + ' BeforeRunmodal');
                    SalesOrderTestCard.SetTableView(rec);
                    SalesOrderTestCard.RunModal();
                end;
*****      



page 50098 SalesOrderTestCard
****
    trigger OnInit()
    begin
        // start bl001.mk
        // stop bl001.mk
        Message('%1', Format(CurrentDateTime, 0, '<Day,2>-<Month,2>-<Year> <Hours24,2>.<Minutes,2>.<Seconds,2><Second dec>') + ' OnInit');
    end;

    trigger OnOpenPage()
    begin
        // start bl001.mk
        // stop bl001.mk
        Message('%1', Format(CurrentDateTime, 0, '<Day,2>-<Month,2>-<Year> <Hours24,2>.<Minutes,2>.<Seconds,2><Second dec>') + ' OnOpenPage');
    end;

    trigger OnAfterGetRecord()
    begin
        // start bl001.mk
        // stop bl001.mk
        Message('%1', Format(CurrentDateTime, 0, '<Day,2>-<Month,2>-<Year> <Hours24,2>.<Minutes,2>.<Seconds,2><Second dec>') + ' OnAfterGetRecord');
    end;
****

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Dynamics 365 Business Central

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Steven Renders 5,672 Moderator on at

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Have a look here:

Performance Tips for Business Users - Business Central | Microsoft Learn

https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/performance/performance-users#choosing-a-desktop-browser

How to work with a performance problem - Business Central | Microsoft Learn

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Saurav.Dhyani 14,380 Super User 2025 Season 2 on at

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Hi,

Try running Performance Profiler in Business Central webclient to understand extension and code that is causing delay.

How to use Performance profiler:

1. https://youtu.be/MoK-W4kQF7g?si=gTRCyTwF9RME5sqX

2. https://youtu.be/e-tR9EBGsiA?si=nZuP8LulEYQOc6Q3

Let us know your results after you run performance profiler.

Regards,

Saurav Dhyani

https://bit.ly/SubscribeSauravYouTube

https://bit.ly/sauravlinkedin

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Badaboom 65 on at

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Thx for your replies!

But unfortunately the Performance Profiler nor the Planned Profiles is showing anything when I'm opening the Sales Order Card, seems like our machine is too fast to show something because the minimal hit is not triggered?

I've tracked the Webclient and the Tablet client within the chrome browser dev tools.

Here you can clearly see that the tablet client (for the same Sales Order Card, same service, same machine) is way faster.

There is a big part within the scripting which takes that long...

How can I figure out whats causing it?

Could it be that the cortex xdr is involved in this?

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Badaboom 65 on at

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Tomorrow we will deactivate the antivirus and check if its faster...

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YUN ZHU 95,739 Super User 2025 Season 2 on at

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Will this problem occur when using the BC app?

More details: https://learn.microsoft.com/en-us/dynamics365/business-central/install-desktop-app#from-the-browser

It looks like a firewall or authentication issue.

Thanks

ZHU

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Badaboom 65 on at

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Unfortunately the BC App mode is not really faster and the deactivation of the Antvir didn't bring the success...

I also tried to open chrome without any extension but also no big performance increase...

I think the BC webclient is strongly depended on the CPU and the boosting possibilties of it.

I found a computer within our environment on which the data is faster showing up than on the Application server itself (the pc is 200km away from the server)...

I don't have any more ideas and will stop at this point to further look into the performance topics...

I think handling loads of data within webclient is just bad optimized from microsoft...

What would be interesting for me is whats the big difference in loading and showing the data between tablet mode and normal webclient is?!
Unfortunately there is no instrument for me to see if its caused by network or local cpu...

Btw: I've tried the Windows and AccessControlService but also no difference...

Here some manually measured opening times:

Application Server (opening Sales Order in seconds):

5,06
5,03
5,00
4,30
4,34
4,44
4,32
5,02
4,35
New PC with intel core i5-12500 (opening Sales Order in seconds):

3,61
3,58
3,90
3,00
3,46
3,51
3,69
3,58
My workstation xeon w-2133 (opening Sales Order in seconds):
5,51
5,41
7,16
7,62
5,62
5,21
5,52
5,24
5,59

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Gerardo Rentería Ga... 25,365 Most Valuable Professional on at

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Hi, good day
I hope this can help you, and give you some hints.

Performance of Business Central On-Premises Installations - Business Central | Microsoft Learn

Best Regards
Gerardo

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YUN ZHU 95,739 Super User 2025 Season 2 on at

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I'm curious, if you restore the database locally, will it be the same as on the server?

In addition, some Microsoft codes only run on the web client, so the different speeds should be standard behavior.

For example,

Dynamics 365 Business Central: How to get the client type that is running in the current session via AL code

https://yzhums.com/9856/

Thanks.

ZHU

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Badaboom 65 on at

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Thx for the hints but I've already checked everything and no performance enhancement.

Today we're gonna update the Version from 25.1 to 25.4. The Testsystem reacts way faster... Probably it has something to do with the hotfix

562348

Improved performance when generating AL callstack.

It seems like there is an issue with the 25.1 Version... I would strongly recommend if your onprem to update to the latest release...

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