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runtime: add Func method benchmarks

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Change-Id: Ib76872c22b1be9e611199b84fd96b59beedf786c
Reviewed-on: https://go-review.googlesource.com/c/go/+/351457
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Josh Bleecher Snyder 2021-09-21 14:31:09 -07:00
parent 2dda92ff6f
commit f961d8e5b1
1 changed files with 32 additions and 0 deletions
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32
src/runtime/symtab_test.go
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@ -250,3 +250,35 @@ func TestFunctionAlignmentTraceback(t *testing.T) {
t.Errorf("frames.Next() got %+v want %+v", frame.Func, f)
}
}
func BenchmarkFunc(b *testing.B) {
pc, _, _, ok := runtime.Caller(0)
if !ok {
b.Fatal("failed to look up PC")
}
f := runtime.FuncForPC(pc)
b.Run("Name", func(b *testing.B) {
for i := 0; i < b.N; i++ {
name := f.Name()
if name != "runtime_test.BenchmarkFunc" {
b.Fatalf("unexpected name %q", name)
}
}
})
b.Run("Entry", func(b *testing.B) {
for i := 0; i < b.N; i++ {
pc := f.Entry()
if pc == 0 {
b.Fatal("zero PC")
}
}
})
b.Run("FileLine", func(b *testing.B) {
for i := 0; i < b.N; i++ {
file, line := f.FileLine(pc)
if !strings.HasSuffix(file, "symtab_test.go") || line == 0 {
b.Fatalf("unexpected file/line %q:%d", file, line)
}
}
})
}