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Co-authored-by: Davis Goodin <[email protected]>

cgo_go124.go

@@ -1,6 +1,16 @@
 //go:build go1.24 && !cmd_go_bootstrap
 
 package openssl
+// The following noescape and nocallback directives are used to prevent the Go
+// compiler from allocating function parameters on the heap. See
+// https://github.com/golang/go/blob/0733682e5ff4cd294f5eccb31cbe87a543147bc6/src/cmd/cgo/doc.go#L439-L461
+//
+// If possible, write a C wrapper function to optimize a call rather than using
+// this feature so the optimization will work for all supported Go versions.
+//
+// This is just a performance optimization. Only add functions that have been
+// observed to benefit from these directives, not every function that is merely
+// expected to meet the noescape/nocallback criteria.
 
 // #cgo noescape go_openssl_RAND_bytes
 // #cgo nocallback go_openssl_RAND_bytes