Big buffer allocation

[tuxmain]

When we don't need to zero the buffer, isn't this solution the most optimized?

@mikalai

fn allocate_byte_array(len: usize) -> Vec<u8> {
	let mut v: Vec<u8> = Vec::with_capacity(len);
	unsafe {
		v.set_len(len);
	}
	v
}

It seems to do the same as vec![0; n] but without zeroing.

Moreover, vec! calls Vec::with_capacity and then Vec::reserve. Isn't that redundant?