openconsensus update to v0.24.0

https://go.opencensus.io/compare/v0.23.0...v0.24.0

Signed-off-by: Humble Chirammal <humble.devassy@gmail.com>

go.mod

@@ -221,7 +221,7 @@ require (
 	go.etcd.io/etcd/pkg/v3 v3.5.8 // indirect
 	go.etcd.io/etcd/raft/v3 v3.5.8 // indirect
 	go.etcd.io/etcd/server/v3 v3.5.8 // indirect
-	go.opencensus.io v0.23.0 // indirect
+	go.opencensus.io v0.24.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.35.1 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.10.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.10.0 // indirect

go.sum

@@ -714,8 +714,9 @@ go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk=
-go.opencensus.io v0.23.0 h1:gqCw0LfLxScz8irSi8exQc7fyQ0fKQU/qnC/X8+V/1M=
 go.opencensus.io v0.23.0/go.mod h1:XItmlyltB5F7CS4xOC1DcqMoFqwtC6OG2xF7mCv7P7E=
+go.opencensus.io v0.24.0 h1:y73uSU6J157QMP2kn2r30vwW1A2W2WFwSCGnAVxeaD0=
+go.opencensus.io v0.24.0/go.mod h1:vNK8G9p7aAivkbmorf4v+7Hgx+Zs0yY+0fOtgBfjQKo=
 go.opentelemetry.io/contrib/instrumentation/github.com/emicklei/go-restful/otelrestful v0.35.0 h1:KQjX0qQ8H21oBUAvFp4ZLKJMMLIluONvSPDAFIGmX58=
 go.opentelemetry.io/contrib/instrumentation/github.com/emicklei/go-restful/otelrestful v0.35.0/go.mod h1:DQYkU9srMFqLUTVA/7/WlRHdnYDB7wyMMlle2ktMjfI=
 go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.35.0 h1:xFSRQBbXF6VvYRf2lqMJXxoB72XI1K/azav8TekHHSw=

staging/src/k8s.io/legacy-cloud-providers/go.mod

@@ -71,7 +71,7 @@ require (
 	github.com/prometheus/common v0.37.0 // indirect
 	github.com/prometheus/procfs v0.8.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	go.opencensus.io v0.23.0 // indirect
+	go.opencensus.io v0.24.0 // indirect
 	golang.org/x/net v0.9.0 // indirect
 	golang.org/x/sys v0.7.0 // indirect
 	golang.org/x/term v0.7.0 // indirect

staging/src/k8s.io/legacy-cloud-providers/go.sum

@@ -360,8 +360,9 @@ go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk=
-go.opencensus.io v0.23.0 h1:gqCw0LfLxScz8irSi8exQc7fyQ0fKQU/qnC/X8+V/1M=
 go.opencensus.io v0.23.0/go.mod h1:XItmlyltB5F7CS4xOC1DcqMoFqwtC6OG2xF7mCv7P7E=
+go.opencensus.io v0.24.0 h1:y73uSU6J157QMP2kn2r30vwW1A2W2WFwSCGnAVxeaD0=
+go.opencensus.io v0.24.0/go.mod h1:vNK8G9p7aAivkbmorf4v+7Hgx+Zs0yY+0fOtgBfjQKo=
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=

vendor/go.opencensus.io/Makefile

@@ -91,7 +91,7 @@ embedmd:
 
 .PHONY: install-tools
 install-tools:
-	go get -u golang.org/x/lint/golint
-	go get -u golang.org/x/tools/cmd/cover
-	go get -u golang.org/x/tools/cmd/goimports
-	go get -u github.com/rakyll/embedmd
+	go install golang.org/x/lint/golint@latest
+	go install golang.org/x/tools/cmd/cover@latest
+	go install golang.org/x/tools/cmd/goimports@latest
+	go install github.com/rakyll/embedmd@latest

vendor/go.opencensus.io/opencensus.go

@@ -17,5 +17,5 @@ package opencensus // import "go.opencensus.io"
 
 // Version is the current release version of OpenCensus in use.
 func Version() string {
-	return "0.23.0"
+	return "0.24.0"
 }

vendor/go.opencensus.io/plugin/ochttp/server.go

@@ -31,14 +31,14 @@ import (
 // Handler is an http.Handler wrapper to instrument your HTTP server with
 // OpenCensus. It supports both stats and tracing.
 //
-// Tracing
+// # Tracing
 //
 // This handler is aware of the incoming request's span, reading it from request
 // headers as configured using the Propagation field.
 // The extracted span can be accessed from the incoming request's
 // context.
 //
-//    span := trace.FromContext(r.Context())
+//	span := trace.FromContext(r.Context())
 //
 // The server span will be automatically ended at the end of ServeHTTP.
 type Handler struct {
@@ -224,7 +224,9 @@ func (t *trackingResponseWriter) WriteHeader(statusCode int) {
 }
 
 // wrappedResponseWriter returns a wrapped version of the original
-//  ResponseWriter and only implements the same combination of additional
+//
+//	ResponseWriter and only implements the same combination of additional
+//
 // interfaces as the original.
 // This implementation is based on https://github.com/felixge/httpsnoop.
 func (t *trackingResponseWriter) wrappedResponseWriter() http.ResponseWriter {

vendor/go.opencensus.io/stats/doc.go

@@ -19,7 +19,7 @@ Package stats contains support for OpenCensus stats recording.
 OpenCensus allows users to create typed measures, record measurements,
 aggregate the collected data, and export the aggregated data.
 
-Measures
+# Measures
 
 A measure represents a type of data point to be tracked and recorded.
 For example, latency, request Mb/s, and response Mb/s are measures
@@ -33,7 +33,7 @@ Libraries can define and export measures. Application authors can then
 create views and collect and break down measures by the tags they are
 interested in.
 
-Recording measurements
+# Recording measurements
 
 Measurement is a data point to be collected for a measure. For example,
 for a latency (ms) measure, 100 is a measurement that represents a 100ms
@@ -49,7 +49,7 @@ Libraries can always record measurements, and applications can later decide
 on which measurements they want to collect by registering views. This allows
 libraries to turn on the instrumentation by default.
 
-Exemplars
+# Exemplars
 
 For a given recorded measurement, the associated exemplar is a diagnostic map
 that gives more information about the measurement.
@@ -64,6 +64,5 @@ then the trace span will be added to the exemplar associated with the measuremen
 
 When exported to a supporting back end, you should be able to easily navigate
 to example traces that fell into each bucket in the Distribution.
-
 */
 package stats // import "go.opencensus.io/stats"

vendor/go.opencensus.io/stats/internal/record.go

@@ -21,5 +21,11 @@ import (
 // DefaultRecorder will be called for each Record call.
 var DefaultRecorder func(tags *tag.Map, measurement interface{}, attachments map[string]interface{})
 
+// MeasurementRecorder will be called for each Record call. This is the same as DefaultRecorder but
+// avoids interface{} conversion.
+// This will be a func(tags *tag.Map, measurement []Measurement, attachments map[string]interface{}) type,
+// but is interface{} here to avoid import loops
+var MeasurementRecorder interface{}
+
 // SubscriptionReporter reports when a view subscribed with a measure.
 var SubscriptionReporter func(measure string)

vendor/go.opencensus.io/stats/record.go

@@ -86,10 +86,29 @@ func createRecordOption(ros ...Options) *recordOptions {
 	return o
 }
 
+type measurementRecorder = func(tags *tag.Map, measurement []Measurement, attachments map[string]interface{})
+
 // Record records one or multiple measurements with the same context at once.
 // If there are any tags in the context, measurements will be tagged with them.
 func Record(ctx context.Context, ms ...Measurement) {
-	RecordWithOptions(ctx, WithMeasurements(ms...))
+	// Record behaves the same as RecordWithOptions, but because we do not have to handle generic functionality
+	// (RecordOptions) we can reduce some allocations to speed up this hot path
+	if len(ms) == 0 {
+		return
+	}
+	recorder := internal.MeasurementRecorder.(measurementRecorder)
+	record := false
+	for _, m := range ms {
+		if m.desc.subscribed() {
+			record = true
+			break
+		}
+	}
+	if !record {
+		return
+	}
+	recorder(tag.FromContext(ctx), ms, nil)
+	return
 }
 
 // RecordWithTags records one or multiple measurements at once.

vendor/go.opencensus.io/stats/view/aggregation.go

@@ -90,9 +90,9 @@ func Sum() *Aggregation {
 //
 // If len(bounds) >= 2 then the boundaries for bucket index i are:
 //
-//     [-infinity, bounds[i]) for i = 0
-//     [bounds[i-1], bounds[i]) for 0 < i < length
-//     [bounds[i-1], +infinity) for i = length
+//	[-infinity, bounds[i]) for i = 0
+//	[bounds[i-1], bounds[i]) for 0 < i < length
+//	[bounds[i-1], +infinity) for i = length
 //
 // If len(bounds) is 0 then there is no histogram associated with the
 // distribution. There will be a single bucket with boundaries

vendor/go.opencensus.io/stats/view/collector.go

@@ -59,8 +59,15 @@ func (c *collector) clearRows() {
 // encodeWithKeys encodes the map by using values
 // only associated with the keys provided.
 func encodeWithKeys(m *tag.Map, keys []tag.Key) []byte {
+	// Compute the buffer length we will need ahead of time to avoid resizing later
+	reqLen := 0
+	for _, k := range keys {
+		s, _ := m.Value(k)
+		// We will store each key + its length
+		reqLen += len(s) + 1
+	}
 	vb := &tagencoding.Values{
-		Buffer: make([]byte, len(keys)),
+		Buffer: make([]byte, reqLen),
 	}
 	for _, k := range keys {
 		v, _ := m.Value(k)

vendor/go.opencensus.io/stats/view/doc.go

@@ -34,7 +34,7 @@
 // Libraries can define views but it is recommended that in most cases registering
 // views be left up to applications.
 //
-// Exporting
+// # Exporting
 //
 // Collected and aggregated data can be exported to a metric collection
 // backend by registering its exporter.

vendor/go.opencensus.io/stats/view/worker.go

@@ -33,6 +33,7 @@ func init() {
 	defaultWorker = NewMeter().(*worker)
 	go defaultWorker.start()
 	internal.DefaultRecorder = record
+	internal.MeasurementRecorder = recordMeasurement
 }
 
 type measureRef struct {
@@ -199,11 +200,21 @@ func record(tags *tag.Map, ms interface{}, attachments map[string]interface{}) {
 	defaultWorker.Record(tags, ms, attachments)
 }
 
+func recordMeasurement(tags *tag.Map, ms []stats.Measurement, attachments map[string]interface{}) {
+	defaultWorker.recordMeasurement(tags, ms, attachments)
+}
+
 // Record records a set of measurements ms associated with the given tags and attachments.
 func (w *worker) Record(tags *tag.Map, ms interface{}, attachments map[string]interface{}) {
+	w.recordMeasurement(tags, ms.([]stats.Measurement), attachments)
+}
+
+// recordMeasurement records a set of measurements ms associated with the given tags and attachments.
+// This is the same as Record but without an interface{} type to avoid allocations
+func (w *worker) recordMeasurement(tags *tag.Map, ms []stats.Measurement, attachments map[string]interface{}) {
 	req := &recordReq{
 		tm:          tags,
-		ms:          ms.([]stats.Measurement),
+		ms:          ms,
 		attachments: attachments,
 		t:           time.Now(),
 	}
@@ -221,6 +232,11 @@ func SetReportingPeriod(d time.Duration) {
 	defaultWorker.SetReportingPeriod(d)
 }
 
+// Stop stops the default worker.
+func Stop() {
+	defaultWorker.Stop()
+}
+
 // SetReportingPeriod sets the interval between reporting aggregated views in
 // the program. If duration is less than or equal to zero, it enables the
 // default behavior.
@@ -281,7 +297,7 @@ func (w *worker) start() {
 		case <-w.quit:
 			w.timer.Stop()
 			close(w.c)
-			w.done <- true
+			close(w.done)
 			return
 		}
 	}
@@ -290,8 +306,11 @@ func (w *worker) start() {
 func (w *worker) Stop() {
 	prodMgr := metricproducer.GlobalManager()
 	prodMgr.DeleteProducer(w)
-
-	w.quit <- true
+	select {
+	case <-w.quit:
+	default:
+		close(w.quit)
+	}
 	<-w.done
 }
 

vendor/go.opencensus.io/tag/profile_19.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build go1.9
 // +build go1.9
 
 package tag

vendor/go.opencensus.io/tag/profile_not19.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build !go1.9
 // +build !go1.9
 
 package tag

vendor/go.opencensus.io/trace/doc.go

@@ -18,24 +18,23 @@ Package trace contains support for OpenCensus distributed tracing.
 The following assumes a basic familiarity with OpenCensus concepts.
 See http://opencensus.io
 
-
-Exporting Traces
+# Exporting Traces
 
 To export collected tracing data, register at least one exporter. You can use
 one of the provided exporters or write your own.
 
-    trace.RegisterExporter(exporter)
+	trace.RegisterExporter(exporter)
 
 By default, traces will be sampled relatively rarely. To change the sampling
 frequency for your entire program, call ApplyConfig. Use a ProbabilitySampler
 to sample a subset of traces, or use AlwaysSample to collect a trace on every run:
 
-    trace.ApplyConfig(trace.Config{DefaultSampler: trace.AlwaysSample()})
+	trace.ApplyConfig(trace.Config{DefaultSampler: trace.AlwaysSample()})
 
 Be careful about using trace.AlwaysSample in a production application with
 significant traffic: a new trace will be started and exported for every request.
 
-Adding Spans to a Trace
+# Adding Spans to a Trace
 
 A trace consists of a tree of spans. In Go, the current span is carried in a
 context.Context.
@@ -44,8 +43,8 @@ It is common to want to capture all the activity of a function call in a span. F
 this to work, the function must take a context.Context as a parameter. Add these two
 lines to the top of the function:
 
-    ctx, span := trace.StartSpan(ctx, "example.com/Run")
-    defer span.End()
+	ctx, span := trace.StartSpan(ctx, "example.com/Run")
+	defer span.End()
 
 StartSpan will create a new top-level span if the context
 doesn't contain another span, otherwise it will create a child span.

vendor/go.opencensus.io/trace/lrumap.go

@@ -44,7 +44,7 @@ func (lm lruMap) len() int {
 }
 
 func (lm lruMap) keys() []interface{} {
-	keys := make([]interface{}, len(lm.cacheKeys))
+	keys := make([]interface{}, 0, len(lm.cacheKeys))
 	for k := range lm.cacheKeys {
 		keys = append(keys, k)
 	}

vendor/go.opencensus.io/trace/trace_go11.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build go1.11
 // +build go1.11
 
 package trace

vendor/go.opencensus.io/trace/trace_nongo11.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build !go1.11
 // +build !go1.11
 
 package trace

vendor/modules.txt

@@ -823,7 +823,7 @@ go.etcd.io/etcd/server/v3/proxy/grpcproxy/adapter
 go.etcd.io/etcd/server/v3/verify
 go.etcd.io/etcd/server/v3/wal
 go.etcd.io/etcd/server/v3/wal/walpb
-# go.opencensus.io v0.23.0
+# go.opencensus.io v0.24.0
 ## explicit; go 1.13
 go.opencensus.io
 go.opencensus.io/internal