VMess inbound: Optimize replay filter (#5562)

And https://github.com/XTLS/Xray-core/pull/5562#issuecomment-3765387903

common/antireplay/antireplay_test.go

@@ -0,0 +1,33 @@
+package antireplay
+
+import (
+	"bufio"
+	"crypto/rand"
+	"testing"
+)
+
+func BenchmarkMapFilter(b *testing.B) {
+	filter := NewMapFilter[[16]byte](120)
+	var sample [16]byte
+	reader := bufio.NewReader(rand.Reader)
+	reader.Read(sample[:])
+	b.ResetTimer()
+	for range b.N {
+		reader.Read(sample[:])
+		filter.Check(sample)
+	}
+}
+
+func TestMapFilter(t *testing.T) {
+	filter := NewMapFilter[[16]byte](120)
+	var sample [16]byte
+	rand.Read(sample[:])
+	filter.Check(sample)
+	if filter.Check(sample) {
+		t.Error("Unexpected true negative")
+	}
+	sample[0]++
+	if !filter.Check(sample) {
+		t.Error("Unexpected false positive")
+	}
+}