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package zipkin_test
import (
"fmt"
"net/http"
"sync/atomic"
"testing"
"time"
zipkin "github.com/openzipkin/zipkin-go"
"github.com/openzipkin/zipkin-go/idgenerator"
"github.com/openzipkin/zipkin-go/model"
"github.com/openzipkin/zipkin-go/propagation"
"github.com/openzipkin/zipkin-go/propagation/b3"
"google.golang.org/grpc/metadata"
)
const (
b3HTTP = "b3-http"
b3GRPC = "b3-grpc"
)
var tags []string
func init() {
var (
traceID model.TraceID
gen = idgenerator.NewRandom64()
)
tags = make([]string, 1000)
for j := 0; j < len(tags); j++ {
tags[j] = fmt.Sprintf("%d", gen.SpanID(traceID))
}
}
func addAnnotationsAndTags(sp zipkin.Span, numAnnotation, numTag int) {
for j := 0; j < numAnnotation; j++ {
sp.Annotate(time.Now(), "event")
}
for j := 0; j < numTag; j++ {
sp.Tag(tags[j], "")
}
}
func benchmarkWithOps(b *testing.B, numAnnotation, numTag int) {
var (
r countingRecorder
t, _ = zipkin.NewTracer(&r)
)
b.ResetTimer()
for i := 0; i < b.N; i++ {
sp := t.StartSpan("test")
addAnnotationsAndTags(sp, numAnnotation, numTag)
sp.Finish()
}
b.StopTimer()
if int(r) != b.N {
b.Fatalf("missing traces: want %d, have %d", b.N, r)
}
}
func BenchmarkSpan_Empty(b *testing.B) {
benchmarkWithOps(b, 0, 0)
}
func BenchmarkSpan_100Annotations(b *testing.B) {
benchmarkWithOps(b, 100, 0)
}
func BenchmarkSpan_1000Annotations(b *testing.B) {
benchmarkWithOps(b, 1000, 0)
}
func BenchmarkSpan_100Tags(b *testing.B) {
benchmarkWithOps(b, 0, 100)
}
func BenchmarkSpan_1000Tags(b *testing.B) {
benchmarkWithOps(b, 0, 1000)
}
func benchmarkInject(b *testing.B, propagationType string) {
var (
r countingRecorder
injector propagation.Injector
tracer, _ = zipkin.NewTracer(&r)
)
switch propagationType {
case b3HTTP:
req, _ := http.NewRequest("GET", "/", nil)
injector = b3.InjectHTTP(req)
case b3GRPC:
md := metadata.MD{}
injector = b3.InjectGRPC(&md)
default:
b.Fatalf("unknown injector: %s", propagationType)
}
sp := tracer.StartSpan("testing")
addAnnotationsAndTags(sp, 0, 0)
b.ResetTimer()
for i := 0; i < b.N; i++ {
if err := injector(sp.Context()); err != nil {
b.Fatal(err)
}
}
}
func benchmarkExtract(b *testing.B, propagationType string) {
var (
r countingRecorder
tracer, _ = zipkin.NewTracer(&r)
)
sp := tracer.StartSpan("testing")
switch propagationType {
case b3HTTP:
req, _ := http.NewRequest("GET", "/", nil)
b3.InjectHTTP(req)(sp.Context())
b.ResetTimer()
for i := 0; i < b.N; i++ {
_ = b3.ExtractHTTP(copyRequest(req))
}
case b3GRPC:
md := metadata.MD{}
b3.InjectGRPC(&md)(sp.Context())
b.ResetTimer()
for i := 0; i < b.N; i++ {
md2 := md.Copy()
if _, err := b3.ExtractGRPC(&md2)(); err != nil {
b.Fatal(err)
}
}
default:
b.Fatalf("unknown propagation type: %s", propagationType)
}
}
func BenchmarkInject_B3_HTTP_Empty(b *testing.B) {
benchmarkInject(b, b3HTTP)
}
func BenchmarkInject_B3_GRPC_Empty(b *testing.B) {
benchmarkInject(b, b3GRPC)
}
func BenchmarkExtract_B3_HTTP_Empty(b *testing.B) {
benchmarkExtract(b, b3HTTP)
}
func BenchmarkExtract_B3_GRPC_Empty(b *testing.B) {
benchmarkExtract(b, b3GRPC)
}
type countingRecorder int32
func (c *countingRecorder) Send(_ model.SpanModel) {
atomic.AddInt32((*int32)(c), 1)
}
func (c *countingRecorder) Close() error { return nil }
func copyRequest(req *http.Request) *http.Request {
r, _ := http.NewRequest("GET", "/", nil)
for k, v := range req.Header {
r.Header[k] = v
}
return r
}
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