| go test -bench=Foo -cpuprofile=default.pgo -timeout=30s | |
| go test -bench=Foo -pgo=default.pgo -timeout=30s | |
| ! stdout 'FAIL' | |
| -- main_test.go -- | |
| package main | |
| import ( | |
| "testing" | |
| ) | |
| var a int | |
| func save(x int) { | |
| a = x | |
| } | |
| func foo() { | |
| for i := range yield1 { | |
| defer save(i) | |
| } | |
| } | |
| func yield1(yield func(int) bool) { | |
| yield(1) | |
| } | |
| func BenchmarkFoo(b *testing.B) { | |
| for i := 0; i < b.N; i++ { | |
| foo() | |
| } | |
| if a != 1 { | |
| b.Fatalf("a = %d; want 1", a) | |
| } | |
| } | |
| -- go.mod -- | |
| module demo | |
| go 1.24 |