fast path for labels

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

go.mod

@@ -4,5 +4,5 @@ go 1.16
 
 require (
 	github.com/VictoriaMetrics/metrics v1.17.2
-	github.com/unistack-org/micro/v3 v3.3.11
+	github.com/unistack-org/micro/v3 v3.4.11
 )

go.sum

@@ -2,23 +2,23 @@ github.com/VictoriaMetrics/metrics v1.17.2 h1:9zPJ7DPfxdJWshOGLPLpAtPL0ZZ9AeUyQC
 github.com/VictoriaMetrics/metrics v1.17.2/go.mod h1:Z1tSfPfngDn12bTfZSCqArT3OPY3u88J12hSoOhuiRE=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/ef-ds/deque v1.0.4/go.mod h1:gXDnTC3yqvBcHbq2lcExjtAcVrOnJCbMcZXmuj8Z4tg=
-github.com/google/uuid v1.2.0 h1:qJYtXnJRWmpe7m/3XlyhrsLrEURqHRM2kxzoxXqyUDs=
-github.com/google/uuid v1.2.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
+github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/imdario/mergo v0.3.12/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH0dnCYA=
 github.com/patrickmn/go-cache v2.1.0+incompatible h1:HRMgzkcYKYpi3C8ajMPV8OFXaaRUnok+kx1WdO15EQc=
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 github.com/silas/dag v0.0.0-20210121180416-41cf55125c34/go.mod h1:7RTUFBdIRC9nZ7/3RyRNH1bdqIShrDejd1YbLwgPS+I=
-github.com/unistack-org/micro/v3 v3.3.11 h1:Jr0gAw5lLqgddiHKQeWUOUeP6ZqgRhz52EA9zJ5MJ3U=
-github.com/unistack-org/micro/v3 v3.3.11/go.mod h1:PPCt675o3HPcODFbJ4iRWPmQFAk1WQ+asQSOb/syq6U=
+github.com/unistack-org/micro/v3 v3.4.11 h1:WIqUeRN+awVMzTFNeCPx67sSMP3YuXugLmO9qkn8e7g=
+github.com/unistack-org/micro/v3 v3.4.11/go.mod h1:1ZkwpEqpiHiVhM2hiF9DamtpsF04oFybFhEQ4zEMcro=
 github.com/valyala/fastrand v1.0.0 h1:LUKT9aKer2dVQNUi3waewTbKV+7H17kvWFNKs2ObdkI=
 github.com/valyala/fastrand v1.0.0/go.mod h1:HWqCzkrkg6QXT8V2EXWvXCoow7vLwOFN002oeRzjapQ=
 github.com/valyala/histogram v1.1.2 h1:vOk5VrGjMBIoPR5k6wA8vBaC8toeJ8XO0yfRjFEc1h8=
 github.com/valyala/histogram v1.1.2/go.mod h1:CZAr6gK9dbD7hYx2s8WSPh0p5x5wETjC+2b3PJVtEdg=
-golang.org/x/net v0.0.0-20210331212208-0fccb6fa2b5c/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
+golang.org/x/net v0.0.0-20210510120150-4163338589ed/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

victoriametrics.go

@@ -2,7 +2,6 @@ package victoriametrics
 
 import (
 	"io"
-	"strings"
 	"time"
 
 	"github.com/VictoriaMetrics/metrics"
@@ -22,69 +21,57 @@ func (r *victoriametricsMeter) Name() string {
 	return r.opts.Name
 }
 
-func (r *victoriametricsMeter) buildName(name string, opts ...meter.Option) string {
-	var b strings.Builder
-
-	options := r.opts
-	for _, o := range opts {
-		o(&options)
+func (r *victoriametricsMeter) buildName(name string, labels ...string) string {
+	if len(r.opts.MetricPrefix) > 0 {
+		name = r.opts.MetricPrefix + name
 	}
 
-	if len(options.MetricPrefix) > 0 {
-		_, _ = b.WriteString(options.MetricPrefix)
-	}
-	labelPrefix := false
-	if len(options.LabelPrefix) > 0 {
-		labelPrefix = true
-	}
-	_, _ = b.WriteString(name)
-	if len(options.Labels) > 0 {
-		meter.Sort(&options.Labels)
-		_, _ = b.WriteRune('{')
-		for idx := 0; idx < len(options.Labels); idx += 2 {
-			if idx > 0 {
-				_, _ = b.WriteRune(',')
-			}
-			if labelPrefix {
-				_, _ = b.WriteString(options.LabelPrefix)
-			}
-			_, _ = b.WriteString(options.Labels[idx])
-			_, _ = b.WriteString(`="`)
-			_, _ = b.WriteString(options.Labels[idx+1])
-			_, _ = b.WriteString(`"`)
-		}
-		_, _ = b.WriteRune('}')
+	if len(labels) == 0 {
+		return name
 	}
 
-	return b.String()
+	if len(r.opts.LabelPrefix) == 0 {
+		return meter.BuildName(name, labels...)
+	}
+
+	nlabels := make([]string, len(labels))
+	copy(nlabels, labels)
+	for idx := 0; idx <= len(nlabels)/2; idx += 2 {
+		nlabels[idx] = r.opts.LabelPrefix + nlabels[idx]
+	}
+	return meter.BuildName(name, nlabels...)
 }
 
-func (r *victoriametricsMeter) Counter(name string, opts ...meter.Option) meter.Counter {
-	return r.set.GetOrCreateCounter(r.buildName(name, opts...))
+func (r *victoriametricsMeter) Counter(name string, labels ...string) meter.Counter {
+	return r.set.GetOrCreateCounter(r.buildName(name, labels...))
 }
 
-func (r *victoriametricsMeter) FloatCounter(name string, opts ...meter.Option) meter.FloatCounter {
-	return r.set.GetOrCreateFloatCounter(r.buildName(name, opts...))
+func (r *victoriametricsMeter) FloatCounter(name string, labels ...string) meter.FloatCounter {
+	return r.set.GetOrCreateFloatCounter(r.buildName(name, labels...))
 }
 
-func (r *victoriametricsMeter) Gauge(name string, f func() float64, opts ...meter.Option) meter.Gauge {
-	return r.set.GetOrCreateGauge(r.buildName(name, opts...), f)
+func (r *victoriametricsMeter) Gauge(name string, f func() float64, labels ...string) meter.Gauge {
+	return r.set.GetOrCreateGauge(r.buildName(name, labels...), f)
 }
 
-func (r *victoriametricsMeter) Histogram(name string, opts ...meter.Option) meter.Histogram {
-	return r.set.GetOrCreateHistogram(r.buildName(name, opts...))
+func (r *victoriametricsMeter) Histogram(name string, labels ...string) meter.Histogram {
+	return r.set.GetOrCreateHistogram(r.buildName(name, labels...))
 }
 
-func (r *victoriametricsMeter) Summary(name string, opts ...meter.Option) meter.Summary {
-	return r.set.GetOrCreateSummary(r.buildName(name, opts...))
+func (r *victoriametricsMeter) Summary(name string, labels ...string) meter.Summary {
+	return r.set.GetOrCreateSummary(r.buildName(name, labels...))
 }
 
-func (r *victoriametricsMeter) SummaryExt(name string, window time.Duration, quantiles []float64, opts ...meter.Option) meter.Summary {
-	return r.set.GetOrCreateSummaryExt(r.buildName(name, opts...), window, quantiles)
+func (r *victoriametricsMeter) SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) meter.Summary {
+	return r.set.GetOrCreateSummaryExt(r.buildName(name, labels...), window, quantiles)
 }
 
 func (r *victoriametricsMeter) Set(opts ...meter.Option) meter.Meter {
-	m := &victoriametricsMeter{opts: meter.NewOptions(opts...), set: metrics.NewSet()}
+	m := &victoriametricsMeter{opts: r.opts}
+	for _, o := range opts {
+		o(&m.opts)
+	}
+	m.set = metrics.NewSet()
 	return m
 }
 

victoriametrics_test.go

@@ -1,6 +1,7 @@
 package victoriametrics
 
 import (
+	"bytes"
 	"context"
 	"testing"
 
@@ -14,14 +15,13 @@ func TestBuildName(t *testing.T) {
 	m := NewMeter()
 	im := m.(*victoriametricsMeter)
 	check := `micro_foo{micro_aaa="b",micro_bar="baz"}`
-	name := im.buildName("foo", meter.Labels("bar", "baz", "aaa", "b"))
+	name := im.buildName("foo", "bar", "baz", "aaa", "b")
 	if name != check {
 		t.Fatalf("metric name error: %s != %s", name, check)
 	}
 
-	cnt := m.Counter("counter", meter.Labels("key", "val"))
+	cnt := m.Counter("counter", "key", "val")
 	cnt.Inc()
-	//m.Write(os.Stdout, meter.WriteProcessMetrics(true), meter.WriteFDMetrics(true))
 }
 
 func TestWrapper(t *testing.T) {
@@ -44,5 +44,9 @@ func TestWrapper(t *testing.T) {
 	req := &codec.Frame{}
 	err := c.Call(ctx, c.NewRequest("svc2", "Service.Method", req), rsp)
 	_, _ = rsp, err
-	//m.Write(os.Stdout, meter.WriteProcessMetrics(true), meter.WriteFDMetrics(true))
+	buf := bytes.NewBuffer(nil)
+	m.Write(buf, meter.WriteProcessMetrics(false), meter.WriteFDMetrics(false))
+	if !bytes.Contains(buf.Bytes(), []byte(`micro_client_request_inflight{micro_endpoint="svc2.Service.Method"} 0`)) {
+		t.Fatalf("invalid metrics output: %s", buf.Bytes())
+	}
 }