> Not sure how to verify this, but the assumption you can allocate megabytes on the stack seems wrong.
[]byte{N: 0}
doesn't make sense.
And yet it does: https://godbolt.org/z/h9GW5v3YK
And creates an on-stack slice whose size is only limited by Go's 1GB limit on individual stack frames: https://godbolt.org/z/rKzo8jre6 https://godbolt.org/z/don99e9cn
Yea with more context it suddenly makes sense :p
Interesting, [...] syntax works here as expected. So escape analysis simply doesn't look at the element list.