2025-08-21 14:18:40

Author: mohanson

daze.go

@@ -64,12 +64,14 @@ var Conf = struct {
 
 // Expv is a simple wrapper around the expvars package.
 var Expv = struct {
-	RouterCacheHits *expvar.Int
 	RouterCacheCall *expvar.Int
+	RouterCacheHits *expvar.Int
 	RouterCacheRate expvar.Func
+	RouterIPNetCall *expvar.Int
+	RouterIPNetTime *expvar.Float
 }{
-	RouterCacheHits: expvar.NewInt("RouterCache.Hits"),
 	RouterCacheCall: expvar.NewInt("RouterCache.Call"),
+	RouterCacheHits: expvar.NewInt("RouterCache.Hits"),
 	RouterCacheRate: func() expvar.Func {
 		f := expvar.Func(func() any {
 			hits := expvar.Get("RouterCache.Hits").(*expvar.Int).Value()
@@ -80,6 +82,8 @@ var Expv = struct {
 		expvar.Publish("RouterCache.Rate", f)
 		return f
 	}(),
+	RouterIPNetCall: expvar.NewInt("RouterIPNet.Call"),
+	RouterIPNetTime: expvar.NewFloat("RouterIPNet.Time"),
 }
 
 // ResolverDns returns a DNS resolver.
@@ -763,7 +767,15 @@ func (r *RouterIPNet) FromFile(name string) {
 
 // Road implements daze.Router.
 func (r *RouterIPNet) Road(ctx *Context, host string) Road {
-	l, err := net.DefaultResolver.LookupIPAddr(context.Background(), host)
+	l, err := func() ([]net.IPAddr, error) {
+		Expv.RouterIPNetCall.Add(1)
+		t := time.Now()
+		l, err := net.DefaultResolver.LookupIPAddr(context.Background(), host)
+		s := time.Since(t).Seconds()
+		// This is not strictly concurrency-safe, but it won't have much impact on the data.
+		Expv.RouterIPNetTime.Add((s - Expv.RouterIPNetTime.Value()) / 64)
+		return l, err
+	}()
 	if err != nil {
 		log.Printf("conn: %08x  error %s", ctx.Cid, err)
 		return RoadPuzzle