On Thursday, 2 June 2016 at 21:07:19 UTC, default0 wrote:
The level 2 support description noted that it should be opt-in because its slow.
1) It does not say that level 2 should be opt-in; it says that level 2 should be toggle-able. Nowhere does it say which of level 1 and 2 should be the default.
2) It says that working with graphemes is slower than UTF-16 code UNITS (level 1), but says nothing about streaming decoding of code POINTS (what we have).
3) That document is from 2000, and its claims about performance are surely extremely out-dated, anyway. Computers and the Unicode standard have both changed much since then.
