Is this implementation affected by this chrome bug?

[elliotthill]

First discovered here:
https://stackoverflow.com/questions/47524205/random-high-content-download-time-in-chrome/47684257

Caused by this chrome feature:
https://www.chromestatus.com/feature/5745543795965952

More detail:
TryGhost/Ghost#7934

[joakimkm]

Anyone who knows?