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All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package reflect_test import ( "fmt" . "reflect" "strconv" "testing" ) var sourceAll = struct { Bool Value String Value Bytes Value NamedBytes Value BytesArray Value SliceAny Value MapStringAny Value }{ Bool: ValueOf(new(bool)).Elem(), String: ValueOf(new(string)).Elem(), Bytes: ValueOf(new([]byte)).Elem(), NamedBytes: ValueOf(new(namedBytes)).Elem(), BytesArray: ValueOf(new([32]byte)).Elem(), SliceAny: ValueOf(new([]any)).Elem(), MapStringAny: ValueOf(new(map[string]any)).Elem(), } var sinkAll struct { RawBool bool RawString string RawBytes []byte RawInt int } func BenchmarkBool(b *testing.B) { for i := 0; i < b.N; i++ { sinkAll.RawBool = sourceAll.Bool.Bool() } } func BenchmarkString(b *testing.B) { for i := 0; i < b.N; i++ { sinkAll.RawString = sourceAll.String.String() } } func BenchmarkBytes(b *testing.B) { for i := 0; i < b.N; i++ { sinkAll.RawBytes = sourceAll.Bytes.Bytes() } } func BenchmarkNamedBytes(b *testing.B) { for i := 0; i < b.N; i++ { sinkAll.RawBytes = sourceAll.NamedBytes.Bytes() } } func BenchmarkBytesArray(b *testing.B) { for i := 0; i < b.N; i++ { sinkAll.RawBytes = sourceAll.BytesArray.Bytes() } } func BenchmarkSliceLen(b *testing.B) { for i := 0; i < b.N; i++ { sinkAll.RawInt = sourceAll.SliceAny.Len() } } func BenchmarkMapLen(b *testing.B) { for i := 0; i < b.N; i++ { sinkAll.RawInt = sourceAll.MapStringAny.Len() } } func BenchmarkStringLen(b *testing.B) { for i := 0; i < b.N; i++ { sinkAll.RawInt = sourceAll.String.Len() } } func BenchmarkArrayLen(b *testing.B) { for i := 0; i < b.N; i++ { sinkAll.RawInt = sourceAll.BytesArray.Len() } } func BenchmarkSliceCap(b *testing.B) { for i := 0; i < b.N; i++ { sinkAll.RawInt = sourceAll.SliceAny.Cap() } } func BenchmarkDeepEqual(b *testing.B) { for _, bb := range deepEqualPerfTests { b.Run(ValueOf(bb.x).Type().String(), func(b *testing.B) { b.ReportAllocs() for i := 0; i < b.N; i++ { sink = DeepEqual(bb.x, bb.y) } }) } } func BenchmarkMapsDeepEqual(b *testing.B) { m1 := map[int]int{ 1: 1, 2: 2, } m2 := map[int]int{ 1: 1, 2: 2, } for i := 0; i < b.N; i++ { DeepEqual(m1, m2) } } func BenchmarkIsZero(b *testing.B) { type Int4 struct { a, b, c, d int } type Int1024 struct { a [1024]int } type Int512 struct { a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16 [16]S } s := struct { ArrayComparable [4]T ArrayIncomparable [4]_Complex StructComparable T StructIncomparable _Complex ArrayInt_4 [4]int ArrayInt_1024 [1024]int ArrayInt_1024_NoZero [1024]int Struct4Int Int4 ArrayStruct4Int_1024 [256]Int4 ArrayChanInt_1024 [1024]chan int StructInt_512 Int512 }{} s.ArrayInt_1024_NoZero[512] = 1 source := ValueOf(s) for i := 0; i < source.NumField(); i++ { name := source.Type().Field(i).Name value := source.Field(i) b.Run(name, func(b *testing.B) { for i := 0; i < b.N; i++ { sink = value.IsZero() } }) } } func BenchmarkSetZero(b *testing.B) { source := ValueOf(new(struct { Bool bool Int int64 Uint uint64 Float float64 Complex complex128 Array [4]Value Chan chan Value Func func() Value Interface interface{ String() string } Map map[string]Value Pointer *Value Slice []Value String string Struct Value })).Elem() for i := 0; i < source.NumField(); i++ { name := source.Type().Field(i).Name value := source.Field(i) zero := Zero(value.Type()) b.Run(name+"/Direct", func(b *testing.B) { for i := 0; i < b.N; i++ { value.SetZero() } }) b.Run(name+"/CachedZero", func(b *testing.B) { for i := 0; i < b.N; i++ { value.Set(zero) } }) b.Run(name+"/NewZero", func(b *testing.B) { for i := 0; i < b.N; i++ { value.Set(Zero(value.Type())) } }) } } func BenchmarkSelect(b *testing.B) { channel := make(chan int) close(channel) var cases []SelectCase for i := 0; i < 8; i++ { cases = append(cases, SelectCase{ Dir: SelectRecv, Chan: ValueOf(channel), }) } for _, numCases := range []int{1, 4, 8} { b.Run(strconv.Itoa(numCases), func(b *testing.B) { b.ReportAllocs() for i := 0; i < b.N; i++ { _, _, _ = Select(cases[:numCases]) } }) } } func BenchmarkCall(b *testing.B) { fv := ValueOf(func(a, b string) {}) b.ReportAllocs() b.RunParallel(func(pb *testing.PB) { args := []Value{ValueOf("a"), ValueOf("b")} for pb.Next() { fv.Call(args) } }) } type myint int64 func (i *myint) inc() { *i = *i + 1 } func BenchmarkCallMethod(b *testing.B) { b.ReportAllocs() z := new(myint) v := ValueOf(z.inc) for i := 0; i < b.N; i++ { v.Call(nil) } } func BenchmarkCallArgCopy(b *testing.B) { byteArray := func(n int) Value { return Zero(ArrayOf(n, TypeOf(byte(0)))) } sizes := [...]struct { fv Value arg Value }{ {ValueOf(func(a [128]byte) {}), byteArray(128)}, {ValueOf(func(a [256]byte) {}), byteArray(256)}, {ValueOf(func(a [1024]byte) {}), byteArray(1024)}, {ValueOf(func(a [4096]byte) {}), byteArray(4096)}, {ValueOf(func(a [65536]byte) {}), byteArray(65536)}, } for _, size := range sizes { bench := func(b *testing.B) { args := []Value{size.arg} b.SetBytes(int64(size.arg.Len())) b.ResetTimer() b.RunParallel(func(pb *testing.PB) { for pb.Next() { size.fv.Call(args) } }) } name := fmt.Sprintf("size=%v", size.arg.Len()) b.Run(name, bench) } } func BenchmarkPtrTo(b *testing.B) { // Construct a type with a zero ptrToThis. type T struct{ int } t := SliceOf(TypeOf(T{})) ptrToThis := ValueOf(t).Elem().FieldByName("PtrToThis") if !ptrToThis.IsValid() { b.Skipf("%v has no ptrToThis field; was it removed from rtype?", t) // TODO fix this at top of refactoring // b.Fatalf("%v has no ptrToThis field; was it removed from rtype?", t) } if ptrToThis.Int() != 0 { b.Fatalf("%v.ptrToThis unexpectedly nonzero", t) } b.ResetTimer() // Now benchmark calling PointerTo on it: we'll have to hit the ptrMap cache on // every call. b.RunParallel(func(pb *testing.PB) { for pb.Next() { PointerTo(t) } }) } type B1 struct { X int Y int Z int } func BenchmarkFieldByName1(b *testing.B) { t := TypeOf(B1{}) b.RunParallel(func(pb *testing.PB) { for pb.Next() { t.FieldByName("Z") } }) } func BenchmarkFieldByName2(b *testing.B) { t := TypeOf(S3{}) b.RunParallel(func(pb *testing.PB) { for pb.Next() { t.FieldByName("B") } }) } func BenchmarkFieldByName3(b *testing.B) { t := TypeOf(R0{}) b.RunParallel(func(pb *testing.PB) { for pb.Next() { t.FieldByName("X") } }) } type S struct { i1 int64 i2 int64 } func BenchmarkInterfaceBig(b *testing.B) { v := ValueOf(S{}) b.RunParallel(func(pb *testing.PB) { for pb.Next() { v.Interface() } }) b.StopTimer() } func BenchmarkInterfaceSmall(b *testing.B) { v := ValueOf(int64(0)) b.RunParallel(func(pb *testing.PB) { for pb.Next() { v.Interface() } }) } func BenchmarkNew(b *testing.B) { v := TypeOf(XM{}) b.RunParallel(func(pb *testing.PB) { for pb.Next() { New(v) } }) } func BenchmarkMap(b *testing.B) { type V *int type S string value := ValueOf((V)(nil)) stringKeys := []string{} mapOfStrings := map[string]V{} uint64Keys := []uint64{} mapOfUint64s := map[uint64]V{} userStringKeys := []S{} mapOfUserStrings := map[S]V{} for i := 0; i < 100; i++ { stringKey := fmt.Sprintf("key%d", i) stringKeys = append(stringKeys, stringKey) mapOfStrings[stringKey] = nil uint64Key := uint64(i) uint64Keys = append(uint64Keys, uint64Key) mapOfUint64s[uint64Key] = nil userStringKey := S(fmt.Sprintf("key%d", i)) userStringKeys = append(userStringKeys, userStringKey) mapOfUserStrings[userStringKey] = nil } tests := []struct { label string m, keys, value Value }{ {"StringKeys", ValueOf(mapOfStrings), ValueOf(stringKeys), value}, {"Uint64Keys", ValueOf(mapOfUint64s), ValueOf(uint64Keys), value}, {"UserStringKeys", ValueOf(mapOfUserStrings), ValueOf(userStringKeys), value}, } for _, tt := range tests { b.Run(tt.label, func(b *testing.B) { b.Run("MapIndex", func(b *testing.B) { b.ReportAllocs() for i := 0; i < b.N; i++ { for j := tt.keys.Len() - 1; j >= 0; j-- { tt.m.MapIndex(tt.keys.Index(j)) } } }) b.Run("SetMapIndex", func(b *testing.B) { b.ReportAllocs() for i := 0; i < b.N; i++ { for j := tt.keys.Len() - 1; j >= 0; j-- { tt.m.SetMapIndex(tt.keys.Index(j), tt.value) } } }) }) } } func BenchmarkMapIterNext(b *testing.B) { m := ValueOf(map[string]int{"a": 0, "b": 1, "c": 2, "d": 3}) it := m.MapRange() for i := 0; i < b.N; i++ { for it.Next() { } it.Reset(m) } }