Yeah, no idea personally. Haven't used the gateway functionality in Minio at all.

That being said, the Minio team seem pretty good with writing performance optimised code. Frank Wessels (on Minio team), has been writing articles about Go assembler and other Go optimisation things recently. eg:

• https://blog.minio.io/accelerating-blake2b-by-4x-using-simd-...

• https://blog.minio.io/golang-internals-part-2-nice-benefits-...

So the performance impact might not be such a problem. :)