[quote=@Ellri]We tested the android thingy. Still slow.

typing one letter at a time on a 62-character line meant that 13 or so of them were left untyped by the time we stopped entering letters.

secondary tests put the rate at about 2/3rds completed after typing end.
[/quote]

     What kind of Android device, what Android version, and browser and browser version?

     As noted earlier, at least my own Android cell phone doesn't suffer for similar problems at least not with Firefox variants, so it is not all Android devices. Will test Chrone and the native browser later, given that I remember to, but from my unrelated tests a way back not displaying such delays, I'd presume it'd not occur there either, unless it is the result of a relatively recent change.