Fixes #13732 - IsBackOfficeRequest is extremely inefficient

[Nuklon]

Prerequisites

• I have added steps to test this contribution in the description below

If there's an existing issue for this PR then this fixes #13732

This greatly improves the performance of IsBackOfficeRequest.

[github-actions]

Hi there @Nuklon, thank you for this contribution! 👍

While we wait for one of the Core Collaborators team to have a look at your work, we wanted to let you know about that we have a checklist for some of the things we will consider during review:

• It's clear what problem this is solving, there's a connected issue or a description of what the changes do and how to test them
• The automated tests all pass (see "Checks" tab on this PR)
• The level of security for this contribution is the same or improved
• The level of performance for this contribution is the same or improved
• Avoids creating breaking changes; note that behavioral changes might also be perceived as breaking
• If this is a new feature, Umbraco HQ provided guidance on the implementation beforehand
• 💡 The contribution looks original and the contributor is presumably allowed to share it

Don't worry if you got something wrong. We like to think of a pull request as the start of a conversation, we're happy to provide guidance on improving your contribution.

If you realize that you might want to make some changes then you can do that by adding new commits to the branch you created for this work and pushing new commits. They should then automatically show up as updates to this pull request.

Thanks, from your friendly Umbraco GitHub bot 🤖 🙂

[mikecp]

HI @Nuklon ,
Thanks a lot for providing this performance improvement 👍
And also thanks for your patience since V9 for getting this in 😅

I have left two comments on which I would like to get your feedback. One of them aims at making this even more efficient 😉

Cheers!

[Nuklon]

@mikecp, is this OK to merge now? I'd rather not see this effort also go to waste 🙂

[mikecp]

Hi @Nuklon,
Busy week last week, but don't worry, I'll check your PR in the coming days 👍

[mikecp]

Hello @Nuklon ,

Here we go for the merge! Thank you for helping make Umbraco more performant 👍

I see that this is your first contribution, this is awesome! Congratulations!! 🎉
If you provide us with your account name on Our, @nul800sebastiaan will be very happy to assign our shiny contributor's badge to you 🥇

And we'll be looking forward to your next ones 😉

Cheers!

[nul800sebastiaan]

Cherry picked for 10.5 in 4f8b8b3