416 lines
7.1 KiB
Go
416 lines
7.1 KiB
Go
// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package runtime_test
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import (
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"runtime"
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"testing"
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)
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type I1 interface {
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Method1()
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}
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type I2 interface {
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Method1()
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Method2()
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}
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type TS uint16
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type TM uintptr
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type TL [2]uintptr
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func (TS) Method1() {}
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func (TS) Method2() {}
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func (TM) Method1() {}
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func (TM) Method2() {}
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func (TL) Method1() {}
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func (TL) Method2() {}
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type T8 uint8
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type T16 uint16
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type T32 uint32
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type T64 uint64
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type Tstr string
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type Tslice []byte
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func (T8) Method1() {}
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func (T16) Method1() {}
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func (T32) Method1() {}
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func (T64) Method1() {}
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func (Tstr) Method1() {}
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func (Tslice) Method1() {}
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var (
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e interface{}
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e_ interface{}
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i1 I1
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i2 I2
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ts TS
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tm TM
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tl TL
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ok bool
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)
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// Issue 9370
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func TestCmpIfaceConcreteAlloc(t *testing.T) {
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if runtime.Compiler != "gc" {
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t.Skip("skipping on non-gc compiler")
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}
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n := testing.AllocsPerRun(1, func() {
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_ = e == ts
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_ = i1 == ts
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_ = e == 1
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})
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if n > 0 {
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t.Fatalf("iface cmp allocs=%v; want 0", n)
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}
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}
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func BenchmarkEqEfaceConcrete(b *testing.B) {
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for i := 0; i < b.N; i++ {
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_ = e == ts
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}
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}
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func BenchmarkEqIfaceConcrete(b *testing.B) {
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for i := 0; i < b.N; i++ {
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_ = i1 == ts
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}
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}
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func BenchmarkNeEfaceConcrete(b *testing.B) {
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for i := 0; i < b.N; i++ {
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_ = e != ts
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}
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}
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func BenchmarkNeIfaceConcrete(b *testing.B) {
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for i := 0; i < b.N; i++ {
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_ = i1 != ts
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}
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}
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func BenchmarkConvT2ESmall(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = ts
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}
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}
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func BenchmarkConvT2EUintptr(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = tm
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}
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}
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func BenchmarkConvT2ELarge(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = tl
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}
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}
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func BenchmarkConvT2ISmall(b *testing.B) {
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for i := 0; i < b.N; i++ {
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i1 = ts
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}
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}
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func BenchmarkConvT2IUintptr(b *testing.B) {
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for i := 0; i < b.N; i++ {
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i1 = tm
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}
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}
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func BenchmarkConvT2ILarge(b *testing.B) {
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for i := 0; i < b.N; i++ {
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i1 = tl
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}
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}
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func BenchmarkConvI2E(b *testing.B) {
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i2 = tm
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for i := 0; i < b.N; i++ {
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e = i2
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}
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}
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func BenchmarkConvI2I(b *testing.B) {
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i2 = tm
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for i := 0; i < b.N; i++ {
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i1 = i2
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}
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}
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func BenchmarkAssertE2T(b *testing.B) {
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e = tm
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for i := 0; i < b.N; i++ {
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tm = e.(TM)
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}
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}
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func BenchmarkAssertE2TLarge(b *testing.B) {
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e = tl
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for i := 0; i < b.N; i++ {
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tl = e.(TL)
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}
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}
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func BenchmarkAssertE2I(b *testing.B) {
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e = tm
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for i := 0; i < b.N; i++ {
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i1 = e.(I1)
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}
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}
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func BenchmarkAssertI2T(b *testing.B) {
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i1 = tm
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for i := 0; i < b.N; i++ {
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tm = i1.(TM)
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}
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}
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func BenchmarkAssertI2I(b *testing.B) {
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i1 = tm
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for i := 0; i < b.N; i++ {
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i2 = i1.(I2)
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}
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}
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func BenchmarkAssertI2E(b *testing.B) {
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i1 = tm
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for i := 0; i < b.N; i++ {
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e = i1.(interface{})
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}
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}
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func BenchmarkAssertE2E(b *testing.B) {
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e = tm
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for i := 0; i < b.N; i++ {
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e_ = e
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}
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}
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func BenchmarkAssertE2T2(b *testing.B) {
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e = tm
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for i := 0; i < b.N; i++ {
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tm, ok = e.(TM)
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}
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}
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func BenchmarkAssertE2T2Blank(b *testing.B) {
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e = tm
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for i := 0; i < b.N; i++ {
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_, ok = e.(TM)
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}
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}
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func BenchmarkAssertI2E2(b *testing.B) {
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i1 = tm
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for i := 0; i < b.N; i++ {
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e, ok = i1.(interface{})
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}
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}
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func BenchmarkAssertI2E2Blank(b *testing.B) {
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i1 = tm
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for i := 0; i < b.N; i++ {
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_, ok = i1.(interface{})
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}
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}
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func BenchmarkAssertE2E2(b *testing.B) {
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e = tm
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for i := 0; i < b.N; i++ {
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e_, ok = e.(interface{})
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}
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}
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func BenchmarkAssertE2E2Blank(b *testing.B) {
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e = tm
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for i := 0; i < b.N; i++ {
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_, ok = e.(interface{})
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}
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}
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func TestNonEscapingConvT2E(t *testing.T) {
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if runtime.Compiler == "gccgo" {
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t.Skip("does not work on gccgo without better escape analysis")
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}
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m := make(map[interface{}]bool)
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m[42] = true
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if !m[42] {
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t.Fatalf("42 is not present in the map")
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}
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if m[0] {
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t.Fatalf("0 is present in the map")
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}
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n := testing.AllocsPerRun(1000, func() {
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if m[0] {
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t.Fatalf("0 is present in the map")
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}
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})
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if n != 0 {
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t.Fatalf("want 0 allocs, got %v", n)
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}
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}
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func TestNonEscapingConvT2I(t *testing.T) {
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if runtime.Compiler == "gccgo" {
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t.Skip("does not work on gccgo without better escape analysis")
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}
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m := make(map[I1]bool)
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m[TM(42)] = true
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if !m[TM(42)] {
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t.Fatalf("42 is not present in the map")
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}
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if m[TM(0)] {
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t.Fatalf("0 is present in the map")
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}
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n := testing.AllocsPerRun(1000, func() {
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if m[TM(0)] {
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t.Fatalf("0 is present in the map")
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}
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})
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if n != 0 {
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t.Fatalf("want 0 allocs, got %v", n)
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}
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}
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func TestZeroConvT2x(t *testing.T) {
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if runtime.Compiler == "gccgo" {
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t.Skip("does not work on gccgo without better escape analysis")
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}
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tests := []struct {
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name string
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fn func()
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}{
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{name: "E8", fn: func() { e = eight8 }}, // any byte-sized value does not allocate
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{name: "E16", fn: func() { e = zero16 }}, // zero values do not allocate
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{name: "E32", fn: func() { e = zero32 }},
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{name: "E64", fn: func() { e = zero64 }},
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{name: "Estr", fn: func() { e = zerostr }},
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{name: "Eslice", fn: func() { e = zeroslice }},
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{name: "Econstflt", fn: func() { e = 99.0 }}, // constants do not allocate
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{name: "Econststr", fn: func() { e = "change" }},
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{name: "I8", fn: func() { i1 = eight8I }},
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{name: "I16", fn: func() { i1 = zero16I }},
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{name: "I32", fn: func() { i1 = zero32I }},
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{name: "I64", fn: func() { i1 = zero64I }},
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{name: "Istr", fn: func() { i1 = zerostrI }},
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{name: "Islice", fn: func() { i1 = zerosliceI }},
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}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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n := testing.AllocsPerRun(1000, test.fn)
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if n != 0 {
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t.Errorf("want zero allocs, got %v", n)
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}
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})
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}
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}
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var (
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eight8 uint8 = 8
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eight8I T8 = 8
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zero16 uint16 = 0
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zero16I T16 = 0
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one16 uint16 = 1
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zero32 uint32 = 0
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zero32I T32 = 0
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one32 uint32 = 1
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zero64 uint64 = 0
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zero64I T64 = 0
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one64 uint64 = 1
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zerostr string = ""
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zerostrI Tstr = ""
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nzstr string = "abc"
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zeroslice []byte = nil
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zerosliceI Tslice = nil
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nzslice []byte = []byte("abc")
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zerobig [512]byte
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nzbig [512]byte = [512]byte{511: 1}
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)
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func BenchmarkConvT2Ezero(b *testing.B) {
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b.Run("zero", func(b *testing.B) {
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b.Run("16", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = zero16
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}
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})
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b.Run("32", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = zero32
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}
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})
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b.Run("64", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = zero64
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}
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})
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b.Run("str", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = zerostr
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}
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})
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b.Run("slice", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = zeroslice
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}
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})
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b.Run("big", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = zerobig
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}
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})
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})
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b.Run("nonzero", func(b *testing.B) {
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b.Run("16", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = one16
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}
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})
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b.Run("32", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = one32
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}
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})
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b.Run("64", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = one64
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}
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})
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b.Run("str", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = nzstr
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}
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})
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b.Run("slice", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = nzslice
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}
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})
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b.Run("big", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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e = nzbig
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}
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})
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})
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}
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