Fastest way to check if a predicate can take a single parameter of a specific type

[Per Nordlöw via Digitalmars-d-learn]

I want to check whether

    auto _ = pred(T.init);
    static assert(is(typeof(_) == bool));
compiles or not.

Which one

    __traits(compiles, { auto _ = pred(T.init); static 
assert(is(typeof(_) == bool)); })

and

    is(typeof(pred(T.init)) == bool)

is preferred compilation performance-wise?