imagesloaded.min.js sometimes adding 80+ seconds to page load time

[dfavor]

https://core.trac.wordpress.org/ticket/32802 appears to have injected the imagesloaded.min.js only as minified code.

Best to always inject minfied + unminified code, so code can be debugged, when trouble arises.

​https://www.webpagetest.org/result/161021_C0_1MMB - asset #21 shows problem.

Either this is a bug in this file or a caller.

Whatever the problem, debugging will begin with a copy of the unminifed version.

Whoever has a copy of the exact unminified version that matches the minified version, please attach the file to this ticket.

Also please add unminified versions of all files added in the referenced ticket in subsequent WordPress releases.

Thanks.

[dfavor]

Looking deeper at WPT data, looks like the problem was overly long TTFB - time to first byte.

Very odd. This suggests the the transfer of this single asset/file out of all assets stalled.

Likely this problem has nothing to do with this file.