Delete test of premature optimization
Delete test of premature optimization

I suspect this is worth some perf, but it's probably not enough for us
to care. More importantly, it breaks in Go 1.5, where a recent
optimization made sync.WaitGroup much smaller.

unixorn/goji,zenazn/goji,tchssk/goji,dbmlabs/goji,beni55/goji,cognusion/goji,vsco/goji,w4ngyi/goji