What are the worst parts of D?

[Vladimir Panteleev via Digitalmars-d]

On Thursday, 25 September 2014 at 21:49:43 UTC, H. S. Teoh via 
Digitalmars-d wrote:
> It's not just about performance.

Something I recently realized: because of auto-decoding, 
std.algorithm.find("foo", 'o') cannot be implemented using 
memchr. I think this points to a huge design fail, 
performance-wise.

There are also subtle correctness problems: 
haystack[0..haystack.countUntil(needle)] is wrong, even if it 
works right on ASCII input.

For once I agree with Walter Bright - regarding the chair 
throwing :)