I've done this too (on http://ssz.fr/ker/ http://ssz.fr/ker/ for example) and I've noticed if indeed, HTML DOM was slightly faster than SVG up to a couple Firef

I've done this too (on http://ssz.fr/ker/ http://ssz.fr/ker/ for example) and I've noticed if indeed, HTML DOM was slightly faster than SVG up to a couple Firefox versions ago, I have found it to be consistently slower on Chromium, and about the same in the latest Firefox versions. And 40k elements is a no way with any method other than canvas on Firefox, though it can sometimes stay somewhat usable with SVG on Chromium.