Use StringComparison.Ordinal in hot paths

[enkelmedia]

Prerequisites

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

Description

Uses StringComparison.Ordinal for checks in code hot paths according to this issue:

#18870

[github-actions]

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

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[nul800sebastiaan]

Hey @enkelmedia, good stuff, thanks! And a nice performance update! Next time, can you please be mindful of formatting? I added a lot of spaces for you in this commit 😉 617f24e

Thanks again! 👍

[enkelmedia]

Sorry @nul800sebastiaan 🤦🏼‍♂️ Thanks for fixing them, I will keep this in mind in the future :)