I'm not surprised it doesn't make much of a difference with HTML since the markup contains so much ASCII. But 25 vs 18 kB is almost 40%. That might not be insig

I'm not surprised it doesn't make much of a difference with HTML since the markup contains so much ASCII. But 25 vs 18 kB is almost 40%. That might not be insignificant depending on how much text you're storing. But it's a nitpick really, I just thought it he should have noted some of the disadvantages to UTF-8 as well.