Little benchmark

README.md

@@ -141,3 +141,16 @@ Exported functions (3):
 	- ReturningStringSlice func() ([]string)
 	- ReturningIntArray func() ([3]int32)
 ```
+
+## Plugin call overhead
+
+Using `-buildmode=plugin` with generated plugin seems not to add overhead when calling methods on a wrapper.
+
+```go
+BenchmarkCallOverhead/plugin-8         	30000000	        58.0 ns/op	       0 B/op	       0 allocs/op
+BenchmarkCallOverhead/plugin-8         	30000000	        59.3 ns/op	       0 B/op	       0 allocs/op
+BenchmarkCallOverhead/plugin-8         	30000000	        54.8 ns/op	       0 B/op	       0 allocs/op
+BenchmarkCallOverhead/native-8         	20000000	        59.3 ns/op	       0 B/op	       0 allocs/op
+BenchmarkCallOverhead/native-8         	20000000	        59.8 ns/op	       0 B/op	       0 allocs/op
+BenchmarkCallOverhead/native-8         	20000000	        59.7 ns/op	       0 B/op	       0 allocs/op
+```

cli/cli_bench_test.go

@@ -5,16 +5,20 @@ import "testing"
 //go:generate go-bind-plugin -plugin-package ../internal/test_fixtures/benchmark_plugin -output-package cli -output-path cli_test_plugin.go -output-name BenchmarkPlugin
 func BenchmarkCallOverhead(b *testing.B) {
 	pl, err := BindBenchmarkPlugin("plugin.so")
-	numbers := 10000
+	numbers := 100
 	sl := prepareLargeSlice(numbers)
 	expectedSum := uint64(numbers * (numbers + 1) / 2)
 
 	if err != nil {
 		b.Fatalf("Could not setup benchmark: %s", err)
 	}
 
+	b.Log("Running benchmarks...")
+
 	b.Run("plugin", func(b *testing.B) {
 
+		b.ReportAllocs()
+
 		for i := 0; i < b.N; i++ {
 			sum := pl.Sum(sl)
 
@@ -26,6 +30,9 @@ func BenchmarkCallOverhead(b *testing.B) {
 	})
 
 	b.Run("native", func(b *testing.B) {
+
+		b.ReportAllocs()
+
 		for i := 0; i < b.N; i++ {
 			sum := nativeSum(sl)