TypeFunction example: ImplictConvTargets

[jmh530]

On Tuesday, 6 October 2020 at 13:20:43 UTC, John Colvin wrote:
> [snip]
>
> If you look at the history of std.meta you'll see it was me who 
> recently made Filter so ugly, the previous version was simple 
> but too slow.

To get Filter/staticMap to have improved performance (and it 
looks to me like Stefan copied the phobos version in his 
example), you were forced to make them uglier. But, isn't 
Stefan's point that his version has even better performance than 
your ugly version? Is your argument that the simple version would 
have better performance in this case?