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|
package log_test
import (
"io"
"testing"
"github.com/anacrolix/log"
)
// Mirrors usage seen for a particularly expensive logging call-site in anacrolix/dht.
func BenchmarkEmulateDhtServerReplyLogger(b *testing.B) {
l := log.Default.FilterLevel(log.Info).WithValues(&struct{}{}).WithContextText("some dht prefix").WithDefaultLevel(log.Debug)
makeMsg := func() log.Msg {
return log.Fmsg(
"reply to %q",
"your mum", // dht.Addr caches its String method return value
)
}
b.Run("Filtered", func(b *testing.B) {
b.Run("Direct", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
makeMsg().Log(l)
}
})
b.Run("Lazy", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
l.LazyLog(log.Debug, makeMsg)
}
})
})
b.Run("Unfiltered", func(b *testing.B) {
h := log.DefaultHandler
h.W = io.Discard
l := l
l.Handlers = []log.Handler{h}
b.Run("Direct", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
makeMsg().LogLevel(log.Info, l)
}
})
b.Run("Lazy", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
l.LazyLog(log.Info, makeMsg)
}
})
})
}
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