package main import ( "github.com/gin-gonic/gin" "testing" ) type MyInterface interface{} type MyStruct struct{} func BenchmarkTypeAssertionSuccess(b *testing.B) { var x MyInterface = &MyStruct{} for n := 0; n < b.N; n++ { if _, ok := x.(*MyStruct); !ok { b.Fatal("Type assertion failed") } } } func BenchmarkTypeAssertionFailure(b *testing.B) { var x MyInterface = &MyStruct{} for n := 0; n < b.N; n++ { if _, ok := x.(*gin.Context); ok { b.Fatal("Type assertion should fail") } } }