[swift-evolution] [Pitch] Retiring `where` from for-in loops

[Erica Sadun]

> On Jun 9, 2016, at 11:11 AM, Charlie Monroe <charlie at charliemonroe.net> wrote:
> See my latest post - included results with -Ofast. But still, using filter and lazy.filter is 10+% slower, which were the suggested alternatives to `where`.
> 
> 

I need to correct this misapprehension.
My suggested alternative to where was and remains `guard`.

-- E