js scripts invoked using document.write

[OldNGrey]

zc156a
While using Chrome dev tools I receive warnings about admin | orders and calls to jquery using document.write

Warning message is "A parser-blocking, cross site (i.e. different eTLD+1) script,, https://code.jquery.com/jquery-3.3.1.min.js, is invoked via document.write. The network request for this script MAY be blocked by the browser in this or a future page load due to poor network connectivity. "

This is from the beginning of admin\includes\javascript_loader.php

<script>window.jQuery || document.write('<script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"><\/script>');</script>
<script>window.jQuery || document.write('<script src="includes/javascript/jquery-3.3.1.min.js"><\/script>');</script>

Should this be redesigned to improve performance?

[DrByte]

Should this be redesigned to improve performance?

"Improve performance"? If "performance" is defined (as it often is in the context of javascript) as "better speed of page loads", then, no it wouldn't improve performance.

It's a fallback/catch-all intended to fire only if the previously expected jquery code didn't, for some reason. Therefore it actually improves things, as in prevents things from breaking worse.
Sometimes the things intended to save people from themselves are quite misunderstood by Google's attempts to save people from themselves.