Comparison of encoding/gob vs encoding/json for serialization of SDK datamodel

internal/pkg/data/bench_test.go

@@ -0,0 +1,99 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package data
+
+import (
+	"bytes"
+	"encoding/gob"
+	"encoding/json"
+	"testing"
+	"time"
+)
+
+var (
+	traceID = [16]byte{0x1}
+
+	spanID1 = [8]byte{0x1}
+	spanID2 = [8]byte{0x2}
+
+	now      = time.Now()
+	nowPlus1 = now.Add(1 * time.Second)
+
+	spanA = &Span{
+		TraceId:           traceID,
+		SpanId:            spanID2,
+		ParentSpanId:      spanID1,
+		Flags:             1,
+		Name:              "span-a",
+		StartTimeUnixNano: uint64(now.UnixNano()),
+		EndTimeUnixNano:   uint64(nowPlus1.UnixNano()),
+		Status: &Status{
+			Message: "test status",
+			Code:    Status_STATUS_CODE_OK,
+		},
+	}
+
+	spanB = &Span{}
+
+	scopeSpans = &ScopeSpans{
+		Scope: &InstrumentationScope{
+			Name:    "TestTracer",
+			Version: "v0.1.0",
+		},
+		SchemaUrl: "http://go.opentelemetry.io/test",
+		Spans:     []*Span{spanA, spanB},
+	}
+)
+
+func BenchmarkGOBMarshalUnmarshal(b *testing.B) {
+	// TODO:
+	gob.Register(AnyValue_StringValue{})
+	gob.Register(AnyValue_BoolValue{})
+
+	var out ScopeSpans
+
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		var inBuf bytes.Buffer
+		enc := gob.NewEncoder(&inBuf)
+		err := enc.Encode(scopeSpans)
+		if err != nil {
+			b.Fatal(err)
+		}
+
+		payload := inBuf.Bytes()
+
+		dec := gob.NewDecoder(bytes.NewReader(payload))
+		err = dec.Decode(&out)
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+	_ = out
+}
+
+func BenchmarkJSONMarshalUnmarshal(b *testing.B) {
+	var out ScopeSpans
+
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		var inBuf bytes.Buffer
+		enc := json.NewEncoder(&inBuf)
+		err := enc.Encode(scopeSpans)
+		if err != nil {
+			b.Fatal(err)
+		}
+
+		payload := inBuf.Bytes()
+
+		dec := json.NewDecoder(bytes.NewReader(payload))
+		err = dec.Decode(&out)
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+	_ = out
+}