OptionalcurrentOptionalcurrentProtectedcancelProtectedcreateProtectedinteractProtectedneedProtectedscheduleCoalesces the DOM write for the current symbol to at most once per animation
frame: a fast pen/mouse can fire many continue() calls per frame (further
amplified by coalesced pointer samples), each of which would otherwise force
a real DOM replace + repaint on a canvas that may already hold many symbols.
ProtectedupdateProtectedupdateProtectedupdate
name: alice-strokes-write-latency