On 2016-12-19 11:39, Eli Zaretskii wrote:
> In "emacs -Q"?  If so, it didn't happen to me.  I tried both the Segoe
> Symbol font (which nowadays includes all the Emoji, so the Emoji font
> is not needed), and the Segoe Emoji one, and saw no slow-down.

Let me try this again, then :)

> How can an Emoji font be a fallback for the entire range of Unicode
> characters?  It's not what it's for.

It's a fallback for everything that it covers; 'unicode was just a shorthand for "whatever the font includes".  It's a pain to have to determine exactly what the font covers, especially if the font is going to get updated to support a broader range in the future.

For Symbola, 'unicode was the intended meaning.

Clément.