Re: [go-nuts] cgo binding copies data twice, necessary?

Hi! Yes that works perfectly. I've added the bounds checking. Thanks and cheers! Sincerely, David On Tuesday, August 23, 2022 at 3:51:39 AM UTC-4 progl...@gmail.com wrote: > Assuming that `p.privateKey = *((*C.private_key)(key))` is making a full > copy, not shallow. I think you could avoid

Re: [go-nuts] cgo binding copies data twice, necessary?

Assuming that `p.privateKey = *((*C.private_key)(key))` is making a full copy, not shallow. I think you could avoid using `C.CBytes`. You can get the address of the start of the backing array via [0] as per https://pkg.go.dev/cmd/cgo So maybe something like this: p.privateKey =

[go-nuts] cgo binding copies data twice, necessary?

I recently wrote cgo bindings to the CTIDH C library (a bleeding edge post quantum non-interactive key exchange) copies the data twice. First in the call to C.CBytes and then again in the assignment to p.privateKey via that pointer dereference. The performance hit for the twice copy is not