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Speed up performance of app with A LOT of galleries (and pdf)

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Posted on 25 Jan 2024 19:04:34 by _ru

Hello!

I have a very unique use case of an app I'm building, and part of it requires galleries, a LOT of them. There are 40 galleries total, all of them in are within containers inside of another container that holds them all. Not sure if that's relevant at all, but the structure is:

Container0
- Container1
  - Header label
  - Section label
  - Table gallery
  - Form gallery
- Container2
  - Header label
  - Section label
  - Table gallery
  - Form gallery

And this repeats for 20 containers total, so that's 40 galleries total

I have the PDF function then pointing to Container0 to capture that big container filled with all the other 20 containers,

but the problem is this is VERY slow. It takes up to 2 minutes sometimes for the pdf to generate everything, and even without the PDF function, that screen is just very laggy when editing and to a lesser extent when running. It's crashed my chrome browser a few times with a "not enough memory" error even.

The data that is filling the galleries are all coming from collections that are loaded prior, so I thought that would make it quicker instead of reaching out to each SharePoint list directly.

Does anyone have any ideas as to how to make this any faster/more efficient?

Thank you!

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BCLS776 8,990 Moderator on 01 Feb 2024 at 17:23:46

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Re: Speed up performance of app with A LOT of galleries (and pdf)

The newer PDF() function is basic at this time and trying to force it to do complicated things might lead to the issues you're seeing. For these kinds of PDF outputs, I almost always use a flow to populate a Word doc template, HTML, or another connector (Encodian, Adobe) that handles the workload outside of the app.

Hope that helps,

Bryan

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_ru 71 on 01 Feb 2024 at 17:16:34

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Re: Speed up performance of app with A LOT of galleries (and pdf)

@BCLS776 hey bryan. thanks so much for all the tips. most of which i did/were already done. unfortunately i think the problem is just the amount of controls. it's really pushing it to the limit. instead i'm going to see if i can just push the data i need into a flow to assemble an html file and then either convert to pdf and store it, or send the html data back into a html label in the app and then point the pdf function to that label to see if that will print.

either way, i think i was just stretching the app too thing so need to start back at square one with this feature. i appreciate all the help though!

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BCLS776 8,990 Moderator on 25 Jan 2024 at 19:25:31

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Re: Speed up performance of app with A LOT of galleries (and pdf)

It's difficult to give you exact recommendations without a deep dive into your app, but here are some pointers to try:

Load only the columns your app needs from your datasources, so that the resulting collections have fewer columns

Load only the rows your app needs. For example, if you only work with records created in the last 30 days, load only those

Open a monitoring session on your app, and pay attention to which operations take the longest.

Whenever possible, replace a ForAll() with something that operates more directly on a table

Use the HTML text control to replace a nested gallery, if its main purpose is display only

Remove unneeded controls

Remove references to controls on screens other than the active one

Use named formulas (a relatively new feature) when possible

You mentioned "form gallery" in your post. Forms and galleries don't play well within one another. If that's what you are doing, try to avoid it.

Hope that helps,

Bryan

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