[SOLVED] The windows version of QCAD is slow

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isam.anwar
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[SOLVED] The windows version of QCAD is slow

Post by isam.anwar » Sun Jun 05, 2022 5:54 pm

Hello,

I have dual boot OS system (Windows 10 & Ubuntu) at work and home.
The QCAD on Ubuntu is OK but the Windows version has slow response time (eg. zoom in & out, PAN, etc) depending on the complexity of the drawing. It is noticeable that the same file does not suffer from slow response on Ubuntu.

Can anyone help?

PC 1:
Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz 3.20 GHz
8.00 GB
Windows 10 Pro / Ubuntu 20.04


PC 2:
AMD Ryzen™ 9 3900X CPU
32.00 GB
Windows 10 Pro / Ubuntu 20.04
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Annotation 2022-06-05 184121.png
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Annotation 2022-06-05 184849.png
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Last edited by isam.anwar on Tue Jun 07, 2022 12:50 am, edited 1 time in total.

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Husky
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Re: The windows version of QCAD is slow

Post by Husky » Sun Jun 05, 2022 7:10 pm

Hello,

without us having the actual dxf/dwg it is difficult to figure why you it could be slow on Windows.
1. do you see any chance to post the drawing? Maybe make a copy and delete all sensitive data.
2. is the Windows QCAD version using exactly the same settings like the Ubuntu version?
Work smart, not hard: QCad Pro
Win10/64, QcadPro, QcadCam version: Current.
If a thread is considered as "solved" please change the title of the first post to "[solved] Title..."

isam.anwar
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Re: The windows version of QCAD is slow

Post by isam.anwar » Mon Jun 06, 2022 10:22 am

Husky wrote:
Sun Jun 05, 2022 7:10 pm
Hello,

without us having the actual dxf/dwg it is difficult to figure why you it could be slow on Windows.
1. do you see any chance to post the drawing? Maybe make a copy and delete all sensitive data.
2. is the Windows QCAD version using exactly the same settings like the Ubuntu version?
Hello Husky,

Thank you for reply.
1. I am not sure that the original drawing is allowed to be published!
2. The QCAD setting in Windows is the same as in Ubuntu.
3. I have turned off the visibility of the layers one by one.
4. One of the layers contain text only seems to be responsible for the problem, by turning it off (and keeping the other layers on) there is no slow response and the QCAD is working normally. It contains 3,461 items with different colors and text height but with same font type.
All other layers were turned off, font type of all items was changed but still the slow response!
5. There is another layer containing text items only (709 items). All items in this layer have the same color and text height. By turning on this layer there is no problem.

Any suggestions?
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Annotation 2022-06-06 105212.png
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CVH
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Re: The windows version of QCAD is slow

Post by CVH » Mon Jun 06, 2022 2:06 pm

Hi,

Have a look at App.Prefs .. Graphics View .. Text Rendering.
Is that setting the same?

Regards,
CVH

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Husky
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Re: The windows version of QCAD is slow

Post by Husky » Mon Jun 06, 2022 10:04 pm

isam.anwar wrote:
Mon Jun 06, 2022 10:22 am
1. I am not sure that the original drawing is allowed to be published!
2. The QCAD setting in Windows is the same as in Ubuntu.
3. I have turned off the visibility of the layers one by one.
4. One of the layers contain text only seems to be responsible for the problem, by turning it off (and keeping the other layers on) there is no slow response and the QCAD is working normally. It contains 3,461 items with different colors and text height but with same font type.
All other layers were turned off, font type of all items was changed but still the slow response!
5. There is another layer containing text items only (709 items). All items in this layer have the same color and text height. By turning on this layer there is no problem.

Any suggestions?
Yes, but you will not like it ....

#1 no problem - you explained the issue good enough to tackle it ... :wink:

#4 is most likely the guilty one. Ok, here is the thing: Computer programs are best in what they are built for. CAD isn't meant to do text - it is meant to do "drawings". Yes, it can do text but it is not good at it. Vice versa a word processing program can do drawings too - but the same problem - it isn't good at it.
Explanation: Every text entity in CAD is treated as a geometrical shape. A letter is built with lines, arcs etc etc. The more "fancy" the font is the more entities are used to built the letters. Just to give an idea - your 3500 text entities will most likely be built out of approx. 125000 lines and 1,5 Millionen arcs with a total lengths of 33000 units. That is a lot to render and it will definitely slow QCAD down ...

This said: Try to finder a less "fancy" font like "Standard". Nevertheless - turn the text layer always invisible when you are not directly working on it.
Work smart, not hard: QCad Pro
Win10/64, QcadPro, QcadCam version: Current.
If a thread is considered as "solved" please change the title of the first post to "[solved] Title..."

isam.anwar
Newbie Member
Posts: 5
Joined: Sun Jun 05, 2022 5:24 pm

Re: The windows version of QCAD is slow

Post by isam.anwar » Mon Jun 06, 2022 11:58 pm

CVH wrote:
Mon Jun 06, 2022 2:06 pm
Hi,

Have a look at App.Prefs .. Graphics View .. Text Rendering.
Is that setting the same?

Regards,
CVH
Hello CVH,

Thank you for reply.

Yes the "Text Rendering" setting is the same on QCAD in both operating systems.

isam.anwar
Newbie Member
Posts: 5
Joined: Sun Jun 05, 2022 5:24 pm

Re: The windows version of QCAD is slow

Post by isam.anwar » Tue Jun 07, 2022 12:26 am

Husky wrote:
Mon Jun 06, 2022 10:04 pm

#4 is most likely the guilty one. Ok, here is the thing: Computer programs are best in what they are built for. CAD isn't meant to do text - it is meant to do "drawings". Yes, it can do text but it is not good at it. Vice versa a word processing program can do drawings too - but the same problem - it isn't good at it.
Explanation: Every text entity in CAD is treated as a geometrical shape. A letter is built with lines, arcs etc etc. The more "fancy" the font is the more entities are used to built the letters. Just to give an idea - your 3500 text entities will most likely be built out of approx. 125000 lines and 1,5 Millionen arcs with a total lengths of 33000 units. That is a lot to render and it will definitely slow QCAD down ...

This said: Try to finder a less "fancy" font like "Standard". Nevertheless - turn the text layer always invisible when you are not directly working on it.
Hello Husky,

Thank you for explanation and suggestions.

#4 I was wondering why it is working normally on Ubuntu version while there is an issue on Windows version? although it same file and same app. setting!
Luckily, I am doing the design and drawing work in Ubuntu. In Windows, it is only data entry for drawing data manually (text in the mentioned layer) using a software that does not work properly in Linux.

When changing the font of the text on that layer to "Standard" the response of QCAD in Windows was working normally.
Note:
I am using fonts other than "Standard" because when exporting drawing to PDF file format (using QCAD), the text with "Standard" font type will not converted as text and it is not searchable!

From past experience, the same happens to text with "Standard" font type when using AUTOCAD to export drawing to PDF file format, although AUTOCAD does not suffered from the slow down issue.

CVH
Premier Member
Posts: 3416
Joined: Wed Sep 27, 2017 4:17 pm

Re: [SOLVED] The windows version of QCAD is slow

Post by CVH » Wed Jun 08, 2022 5:22 pm

isam.anwar wrote:
Tue Jun 07, 2022 12:26 am
I am using fonts other than "Standard" because when exporting drawing to PDF file format (using QCAD), the text with "Standard" font type will not converted as text and it is not searchable!
Standard font is line art and not filled contours like TTF.
One probably export geometry in that case and that is not text.
isam.anwar wrote:
Tue Jun 07, 2022 12:26 am
although AUTOCAD does not suffered from the slow down issue.
The tech behind QCAD is meant to be open source and of a whole different level.
The price tag is also of a whole different level ... :wink:

Regards,
CVH

isam.anwar
Newbie Member
Posts: 5
Joined: Sun Jun 05, 2022 5:24 pm

Re: [SOLVED] The windows version of QCAD is slow

Post by isam.anwar » Thu Jun 09, 2022 9:23 am

CVH wrote:
Wed Jun 08, 2022 5:22 pm
isam.anwar wrote:
Tue Jun 07, 2022 12:26 am
although AUTOCAD does not suffered from the slow down issue.
The tech behind QCAD is meant to be open source and of a whole different level.
The price tag is also of a whole different level ... :wink:

Regards,
CVH
I am comparing the performance of QCAD in UBUNTU (which does not suffer from slow down when using fonts other than "Standard") and QCAD in WINDOWS :D although the setting are the same and the drawing file is the same

To show that WINDOWS is not blamed for this issue I gave an example of another software working in WINDOWS (namely AUTOCAD) that not suffer from this issue. :wink:

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