net/dns/resolver: add nameFromQuery benchmark

To convince me it's not as alloc-y as it looks.

Change-Id: I503a0cc267268a23d2973dfde9833c420be4e868
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
pull/3594/head
Brad Fitzpatrick 3 years ago
parent c7052154d5
commit 394c9de02b

@ -168,3 +168,25 @@ func TestMaxDoHInFlight(t *testing.T) {
})
}
}
func BenchmarkNameFromQuery(b *testing.B) {
builder := dns.NewBuilder(nil, dns.Header{})
builder.StartQuestions()
builder.Question(dns.Question{
Name: dns.MustNewName("foo.example."),
Type: dns.TypeA,
Class: dns.ClassINET,
})
msg, err := builder.Finish()
if err != nil {
b.Fatal(err)
}
b.ResetTimer()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
_, err := nameFromQuery(msg)
if err != nil {
b.Fatal(err)
}
}
}

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