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dabaf5bdd622b5594db75de9c88889f6d219eb08
opentelemetry-go/attribute/benchmark_test.go
T
Robert Pająk d13f8ecb2d attribute: add SLICE type support (#8166) 
Fixes https://github.com/open-telemetry/opentelemetry-go/issues/7934

```
$ go test -run=^$ -bench=BenchmarkSlice
goos: linux
goarch: amd64
pkg: go.opentelemetry.io/otel/attribute
cpu: 13th Gen Intel(R) Core(TM) i7-13800H
BenchmarkSlice/Len3/Value-20                    25297926                52.56 ns/op          144 B/op          1 allocs/op
BenchmarkSlice/Len3/KeyValue-20                 21315132                55.97 ns/op          144 B/op          1 allocs/op
BenchmarkSlice/Len3/AsSlice-20                  24214248                50.03 ns/op          144 B/op          1 allocs/op
BenchmarkSlice/Len3/String-20                   14148270                86.48 ns/op           48 B/op          1 allocs/op
BenchmarkSlice/Len3/Emit-20                     13605388                85.18 ns/op           48 B/op          1 allocs/op
BenchmarkSlice/Len5Nested/Value-20              16086171                71.30 ns/op          240 B/op          1 allocs/op
BenchmarkSlice/Len5Nested/KeyValue-20           15547844                75.81 ns/op          240 B/op          1 allocs/op
BenchmarkSlice/Len5Nested/AsSlice-20            17806996                66.16 ns/op          240 B/op          1 allocs/op
BenchmarkSlice/Len5Nested/String-20              7409064               165.2 ns/op            64 B/op          1 allocs/op
BenchmarkSlice/Len5Nested/Emit-20                7666302               161.0 ns/op            64 B/op          1 allocs/op
PASS
ok      go.opentelemetry.io/otel/attribute      12.980s
```

```
$ go test -run=^$ -bench=BenchmarkHashKVs
goos: linux
goarch: amd64
pkg: go.opentelemetry.io/otel/attribute
cpu: 13th Gen Intel(R) Core(TM) i7-13800H
BenchmarkHashKVs-20      1268742               940.5 ns/op             0 B/op          0 allocs/op
PASS
ok      go.opentelemetry.io/otel/attribute      1.198s
```
2026-04-16 12:38:32 +02:00

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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package attribute_test
import (
"math"
"testing"
"go.opentelemetry.io/otel/attribute"
)
// Store results in a file scope var to ensure compiler does not optimize the
// test away.
var (
outV attribute.Value
outKV attribute.KeyValue
outBool bool
outBoolSlice []bool
outInt64 int64
outInt64Slice []int64
outFloat64 float64
outFloat64Slice []float64
outStr string
outStrSlice []string
outValueSlice []attribute.Value
)
func benchmarkEmit(kv attribute.KeyValue) func(*testing.B) {
return func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outStr = kv.Value.Emit() //nolint:staticcheck // Benchmark the deprecated formatter for comparison.
}
}
}
func benchmarkString(kv attribute.KeyValue) func(*testing.B) {
return func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outStr = kv.Value.String()
}
}
}
func BenchmarkBool(b *testing.B) {
k, v := "bool", true
kv := attribute.Bool(k, v)
b.Run("Value", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outV = attribute.BoolValue(v)
}
})
b.Run("KeyValue", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outKV = attribute.Bool(k, v)
}
})
b.Run("AsBool", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outBool = kv.Value.AsBool()
}
})
b.Run("String", benchmarkString(kv))
b.Run("Emit", benchmarkEmit(kv))
}
func BenchmarkBoolSlice(b *testing.B) {
for _, bench := range []struct {
name string
v []bool
}{
{name: "Len2", v: []bool{true, false}},
{name: "Len8", v: []bool{true, false, true, false, true, false, true, false}},
} {
b.Run(bench.name, func(b *testing.B) {
k, v := "bool slice", bench.v
kv := attribute.BoolSlice(k, v)
b.Run("Value", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outV = attribute.BoolSliceValue(v)
}
})
b.Run("KeyValue", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outKV = attribute.BoolSlice(k, v)
}
})
b.Run("AsBoolSlice", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outBoolSlice = kv.Value.AsBoolSlice()
}
})
b.Run("String", benchmarkString(kv))
b.Run("Emit", benchmarkEmit(kv))
})
}
}
func BenchmarkInt(b *testing.B) {
k, v := "int", int(42)
kv := attribute.Int(k, v)
b.Run("Value", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outV = attribute.IntValue(v)
}
})
b.Run("KeyValue", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outKV = attribute.Int(k, v)
}
})
b.Run("String", benchmarkString(kv))
b.Run("Emit", benchmarkEmit(kv))
}
func BenchmarkIntSlice(b *testing.B) {
for _, bench := range []struct {
name string
v []int
}{
{name: "Len2", v: []int{42, -3}},
{name: "Len8", v: []int{42, -3, 12, 7, 9, 11, -5, 0}},
} {
b.Run(bench.name, func(b *testing.B) {
k, v := "int slice", bench.v
kv := attribute.IntSlice(k, v)
b.Run("Value", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outV = attribute.IntSliceValue(v)
}
})
b.Run("KeyValue", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outKV = attribute.IntSlice(k, v)
}
})
b.Run("String", benchmarkString(kv))
b.Run("Emit", benchmarkEmit(kv))
})
}
}
func BenchmarkInt64(b *testing.B) {
k, v := "int64", int64(42)
kv := attribute.Int64(k, v)
b.Run("Value", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outV = attribute.Int64Value(v)
}
})
b.Run("KeyValue", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outKV = attribute.Int64(k, v)
}
})
b.Run("AsInt64", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outInt64 = kv.Value.AsInt64()
}
})
b.Run("String", benchmarkString(kv))
b.Run("Emit", benchmarkEmit(kv))
}
func BenchmarkInt64Slice(b *testing.B) {
for _, bench := range []struct {
name string
v []int64
}{
{name: "Len2", v: []int64{42, -3}},
{name: "Len8", v: []int64{42, -3, 12, 7, 9, 11, -5, 0}},
} {
b.Run(bench.name, func(b *testing.B) {
k, v := "int64 slice", bench.v
kv := attribute.Int64Slice(k, v)
b.Run("Value", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outV = attribute.Int64SliceValue(v)
}
})
b.Run("KeyValue", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outKV = attribute.Int64Slice(k, v)
}
})
b.Run("AsInt64Slice", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outInt64Slice = kv.Value.AsInt64Slice()
}
})
b.Run("String", benchmarkString(kv))
b.Run("Emit", benchmarkEmit(kv))
})
}
}
func BenchmarkFloat64(b *testing.B) {
k, v := "float64", float64(42)
kv := attribute.Float64(k, v)
b.Run("Value", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outV = attribute.Float64Value(v)
}
})
b.Run("KeyValue", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outKV = attribute.Float64(k, v)
}
})
b.Run("AsFloat64", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outFloat64 = kv.Value.AsFloat64()
}
})
b.Run("String", benchmarkString(kv))
b.Run("Emit", benchmarkEmit(kv))
}
func BenchmarkFloat64Slice(b *testing.B) {
for _, bench := range []struct {
name string
v []float64
}{
{name: "Len2", v: []float64{42, -3}},
{name: "Len8", v: []float64{42, -3, 12, 7, 9, 11, -5, 0}},
} {
b.Run(bench.name, func(b *testing.B) {
k, v := "float64 slice", bench.v
kv := attribute.Float64Slice(k, v)
b.Run("Value", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outV = attribute.Float64SliceValue(v)
}
})
b.Run("KeyValue", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outKV = attribute.Float64Slice(k, v)
}
})
b.Run("AsFloat64Slice", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outFloat64Slice = kv.Value.AsFloat64Slice()
}
})
b.Run("String", benchmarkString(kv))
b.Run("Emit", benchmarkEmit(kv))
})
}
}
func BenchmarkString(b *testing.B) {
k, v := "string", "42"
kv := attribute.String(k, v)
b.Run("Value", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outV = attribute.StringValue(v)
}
})
b.Run("KeyValue", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outKV = attribute.String(k, v)
}
})
b.Run("AsString", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outStr = kv.Value.AsString()
}
})
b.Run("String", benchmarkString(kv))
b.Run("Emit", benchmarkEmit(kv))
}
func BenchmarkStringSlice(b *testing.B) {
for _, bench := range []struct {
name string
v []string
}{
{name: "Len2", v: []string{"forty-two", "negative three"}},
{name: "Len8", v: []string{"forty-two", "negative three", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen"}},
} {
b.Run(bench.name, func(b *testing.B) {
k, v := "string slice", bench.v
kv := attribute.StringSlice(k, v)
b.Run("Value", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outV = attribute.StringSliceValue(v)
}
})
b.Run("KeyValue", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outKV = attribute.StringSlice(k, v)
}
})
b.Run("AsStringSlice", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outStrSlice = kv.Value.AsStringSlice()
}
})
b.Run("String", benchmarkString(kv))
b.Run("Emit", benchmarkEmit(kv))
})
}
}
func BenchmarkSlice(b *testing.B) {
for _, bench := range []struct {
name string
v []attribute.Value
}{
{
name: "Len3",
v: []attribute.Value{
attribute.BoolValue(true),
attribute.IntValue(42),
attribute.StringValue("test"),
},
},
{
name: "Len5Nested",
v: []attribute.Value{
attribute.StringValue("quote\""),
attribute.Float64Value(math.Inf(1)),
attribute.ByteSliceValue([]byte("bin")),
attribute.SliceValue(attribute.StringValue("nested"), attribute.Value{}),
attribute.BoolValue(false),
},
},
} {
b.Run(bench.name, func(b *testing.B) {
k, v := "slice", bench.v
kv := attribute.Slice(k, v...)
b.Run("Value", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outV = attribute.SliceValue(v...)
}
})
b.Run("KeyValue", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outKV = attribute.Slice(k, v...)
}
})
b.Run("AsSlice", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
outValueSlice = kv.Value.AsSlice()
}
})
b.Run("String", benchmarkString(kv))
b.Run("Emit", benchmarkEmit(kv))
})
}
}
func BenchmarkByteSlice(b *testing.B) {
k, v := "bytes", []byte("forty-two")
kv := attribute.ByteSlice(k, v)
b.Run("Value", func(b *testing.B) {
b.ReportAllocs()
for b.Loop() {
attribute.ByteSliceValue(v)
}
})
b.Run("KeyValue", func(b *testing.B) {
b.ReportAllocs()
for b.Loop() {
attribute.ByteSlice(k, v)
}
})
b.Run("AsByteSlice", func(b *testing.B) {
b.ReportAllocs()
for b.Loop() {
kv.Value.AsByteSlice()
}
})
b.Run("String", benchmarkString(kv))
b.Run("Emit", benchmarkEmit(kv))
}
func BenchmarkSetEquals(b *testing.B) {
b.Run("Empty", func(b *testing.B) {
benchmarkSetEquals(b, attribute.EmptySet())
})
b.Run("1 string attribute", func(b *testing.B) {
set := attribute.NewSet(attribute.String("string", "42"))
benchmarkSetEquals(b, &set)
})
b.Run("10 string attributes", func(b *testing.B) {
set := attribute.NewSet(
attribute.String("a", "42"),
attribute.String("b", "42"),
attribute.String("c", "42"),
attribute.String("d", "42"),
attribute.String("e", "42"),
attribute.String("f", "42"),
attribute.String("g", "42"),
attribute.String("h", "42"),
attribute.String("i", "42"),
attribute.String("j", "42"),
)
benchmarkSetEquals(b, &set)
})
b.Run("1 int attribute", func(b *testing.B) {
set := attribute.NewSet(attribute.Int("string", 42))
benchmarkSetEquals(b, &set)
})
b.Run("10 int attributes", func(b *testing.B) {
set := attribute.NewSet(
attribute.Int("a", 42),
attribute.Int("b", 42),
attribute.Int("c", 42),
attribute.Int("d", 42),
attribute.Int("e", 42),
attribute.Int("f", 42),
attribute.Int("g", 42),
attribute.Int("h", 42),
attribute.Int("i", 42),
attribute.Int("j", 42),
)
benchmarkSetEquals(b, &set)
})
}
func benchmarkSetEquals(b *testing.B, set *attribute.Set) {
b.ResetTimer()
for range b.N {
if !set.Equals(set) {
b.Fatal("not equal")
}
}
}
// BenchmarkEquivalentMapAccess measures how expensive it is to use
// Equivalent() as a map key. This is on the hot path for making synchronous
// measurements on the metrics API/SDK. It will likely be on the hot path for
// the trace and logs API/SDK in the future.
func BenchmarkEquivalentMapAccess(b *testing.B) {
b.Run("Empty", func(b *testing.B) {
benchmarkEquivalentMapAccess(b, attribute.EmptySet())
})
b.Run("1 string attribute", func(b *testing.B) {
set := attribute.NewSet(attribute.String("string", "42"))
benchmarkEquivalentMapAccess(b, &set)
})
b.Run("10 string attributes", func(b *testing.B) {
set := attribute.NewSet(
attribute.String("a", "42"),
attribute.String("b", "42"),
attribute.String("c", "42"),
attribute.String("d", "42"),
attribute.String("e", "42"),
attribute.String("f", "42"),
attribute.String("g", "42"),
attribute.String("h", "42"),
attribute.String("i", "42"),
attribute.String("j", "42"),
)
benchmarkEquivalentMapAccess(b, &set)
})
b.Run("1 int attribute", func(b *testing.B) {
set := attribute.NewSet(attribute.Int("string", 42))
benchmarkEquivalentMapAccess(b, &set)
})
b.Run("10 int attributes", func(b *testing.B) {
set := attribute.NewSet(
attribute.Int("a", 42),
attribute.Int("b", 42),
attribute.Int("c", 42),
attribute.Int("d", 42),
attribute.Int("e", 42),
attribute.Int("f", 42),
attribute.Int("g", 42),
attribute.Int("h", 42),
attribute.Int("i", 42),
attribute.Int("j", 42),
)
benchmarkEquivalentMapAccess(b, &set)
})
}
func benchmarkEquivalentMapAccess(b *testing.B, set *attribute.Set) {
values := map[attribute.Distinct]int{}
b.ResetTimer()
for range b.N {
values[set.Equivalent()]++
}
}
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