diff --git a/app/dispatcher/default.go b/app/dispatcher/default.go
index 50ed6134..e7679751 100644
--- a/app/dispatcher/default.go
+++ b/app/dispatcher/default.go
@@ -179,7 +179,7 @@ func (d *DefaultDispatcher) getLink(ctx context.Context) (*transport.Link, *tran
 func shouldOverride(ctx context.Context, result SniffResult, request session.SniffingRequest, destination net.Destination) bool {
 	domain := result.Domain()
 	for _, d := range request.ExcludeForDomain {
-		if domain == d {
+		if strings.ToLower(domain) == d {
 			return false
 		}
 	}
diff --git a/app/dns/server.go b/app/dns/server.go
index 0090c998..2004c60f 100644
--- a/app/dns/server.go
+++ b/app/dns/server.go
@@ -348,7 +348,6 @@ func (s *Server) LookupIP(domain string, option dns.IPOption) ([]net.IP, error)
 	if domain == "" {
 		return nil, newError("empty domain name")
 	}
-	domain = strings.ToLower(domain)
 
 	// normalize the FQDN form query
 	if strings.HasSuffix(domain, ".") {
diff --git a/app/dns/server_test.go b/app/dns/server_test.go
index c2b984ad..feb382fa 100644
--- a/app/dns/server_test.go
+++ b/app/dns/server_test.go
@@ -101,8 +101,8 @@ func (*staticHandler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 			rr, _ := dns.NewRR("localhost-b. IN A 127.0.0.4")
 			ans.Answer = append(ans.Answer, rr)
 
-		case q.Name == "mijia\\ cloud." && q.Qtype == dns.TypeA:
-			rr, _ := dns.NewRR("mijia\\ cloud. IN A 127.0.0.1")
+		case q.Name == "Mijia\\ Cloud." && q.Qtype == dns.TypeA:
+			rr, _ := dns.NewRR("Mijia\\ Cloud. IN A 127.0.0.1")
 			ans.Answer = append(ans.Answer, rr)
 		}
 	}
diff --git a/app/router/condition.go b/app/router/condition.go
index 8c5d1de8..fd421560 100644
--- a/app/router/condition.go
+++ b/app/router/condition.go
@@ -66,6 +66,24 @@ type DomainMatcher struct {
 	matchers strmatcher.IndexMatcher
 }
 
+func NewMphMatcherGroup(domains []*Domain) (*DomainMatcher, error) {
+	g := strmatcher.NewMphMatcherGroup()
+	for _, d := range domains {
+		matcherType, f := matcherTypeMap[d.Type]
+		if !f {
+			return nil, newError("unsupported domain type", d.Type)
+		}
+		_, err := g.AddPattern(d.Value, matcherType)
+		if err != nil {
+			return nil, err
+		}
+	}
+	g.Build()
+	return &DomainMatcher{
+		matchers: g,
+	}, nil
+}
+
 func NewDomainMatcher(domains []*Domain) (*DomainMatcher, error) {
 	g := new(strmatcher.MatcherGroup)
 	for _, d := range domains {
@@ -82,7 +100,7 @@ func NewDomainMatcher(domains []*Domain) (*DomainMatcher, error) {
 }
 
 func (m *DomainMatcher) ApplyDomain(domain string) bool {
-	return len(m.matchers.Match(domain)) > 0
+	return len(m.matchers.Match(strings.ToLower(domain))) > 0
 }
 
 // Apply implements Condition.
@@ -91,7 +109,7 @@ func (m *DomainMatcher) Apply(ctx routing.Context) bool {
 	if len(domain) == 0 {
 		return false
 	}
-	return m.ApplyDomain(strings.ToLower(domain))
+	return m.ApplyDomain(domain)
 }
 
 type MultiGeoIPMatcher struct {
diff --git a/app/router/condition_test.go b/app/router/condition_test.go
index 3f7185e6..ef473a24 100644
--- a/app/router/condition_test.go
+++ b/app/router/condition_test.go
@@ -359,6 +359,9 @@ func TestChinaSites(t *testing.T) {
 	matcher, err := NewDomainMatcher(domains)
 	common.Must(err)
 
+	acMatcher, err := NewMphMatcherGroup(domains)
+	common.Must(err)
+
 	type TestCase struct {
 		Domain string
 		Output bool
@@ -387,9 +390,96 @@ func TestChinaSites(t *testing.T) {
 	}
 
 	for _, testCase := range testCases {
-		r := matcher.ApplyDomain(testCase.Domain)
-		if r != testCase.Output {
-			t.Error("expected output ", testCase.Output, " for domain ", testCase.Domain, " but got ", r)
+		r1 := matcher.ApplyDomain(testCase.Domain)
+		r2 := acMatcher.ApplyDomain(testCase.Domain)
+		if r1 != testCase.Output {
+			t.Error("DomainMatcher expected output ", testCase.Output, " for domain ", testCase.Domain, " but got ", r1)
+		} else if r2 != testCase.Output {
+			t.Error("ACDomainMatcher expected output ", testCase.Output, " for domain ", testCase.Domain, " but got ", r2)
+		}
+	}
+}
+
+func BenchmarkMphDomainMatcher(b *testing.B) {
+	domains, err := loadGeoSite("CN")
+	common.Must(err)
+
+	matcher, err := NewMphMatcherGroup(domains)
+	common.Must(err)
+
+	type TestCase struct {
+		Domain string
+		Output bool
+	}
+	testCases := []TestCase{
+		{
+			Domain: "163.com",
+			Output: true,
+		},
+		{
+			Domain: "163.com",
+			Output: true,
+		},
+		{
+			Domain: "164.com",
+			Output: false,
+		},
+		{
+			Domain: "164.com",
+			Output: false,
+		},
+	}
+
+	for i := 0; i < 1024; i++ {
+		testCases = append(testCases, TestCase{Domain: strconv.Itoa(i) + ".not-exists.com", Output: false})
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		for _, testCase := range testCases {
+			_ = matcher.ApplyDomain(testCase.Domain)
+		}
+	}
+}
+
+func BenchmarkDomainMatcher(b *testing.B) {
+	domains, err := loadGeoSite("CN")
+	common.Must(err)
+
+	matcher, err := NewDomainMatcher(domains)
+	common.Must(err)
+
+	type TestCase struct {
+		Domain string
+		Output bool
+	}
+	testCases := []TestCase{
+		{
+			Domain: "163.com",
+			Output: true,
+		},
+		{
+			Domain: "163.com",
+			Output: true,
+		},
+		{
+			Domain: "164.com",
+			Output: false,
+		},
+		{
+			Domain: "164.com",
+			Output: false,
+		},
+	}
+
+	for i := 0; i < 1024; i++ {
+		testCases = append(testCases, TestCase{Domain: strconv.Itoa(i) + ".not-exists.com", Output: false})
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		for _, testCase := range testCases {
+			_ = matcher.ApplyDomain(testCase.Domain)
 		}
 	}
 }
diff --git a/app/router/config.go b/app/router/config.go
index 07167a53..f7ce0911 100644
--- a/app/router/config.go
+++ b/app/router/config.go
@@ -67,11 +67,24 @@ func (rr *RoutingRule) BuildCondition() (Condition, error) {
 	conds := NewConditionChan()
 
 	if len(rr.Domain) > 0 {
-		matcher, err := NewDomainMatcher(rr.Domain)
-		if err != nil {
-			return nil, newError("failed to build domain condition").Base(err)
+		switch rr.DomainMatcher {
+		case "linear":
+			matcher, err := NewDomainMatcher(rr.Domain)
+			if err != nil {
+				return nil, newError("failed to build domain condition").Base(err)
+			}
+			conds.Add(matcher)
+		case "mph", "hybrid":
+			fallthrough
+		default:
+			matcher, err := NewMphMatcherGroup(rr.Domain)
+			if err != nil {
+				return nil, newError("failed to build domain condition with MphDomainMatcher").Base(err)
+			}
+			newError("MphDomainMatcher is enabled for ", len(rr.Domain), " domain rule(s)").AtDebug().WriteToLog()
+			conds.Add(matcher)
 		}
-		conds.Add(matcher)
+
 	}
 
 	if len(rr.UserEmail) > 0 {
diff --git a/app/router/config.pb.go b/app/router/config.pb.go
index 69abd370..5938781b 100644
--- a/app/router/config.pb.go
+++ b/app/router/config.pb.go
@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.15.8
 // source: app/router/config.proto
 
 package router
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	net "github.com/xtls/xray-core/common/net"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
@@ -22,10 +21,6 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
-// This is a compile-time assertion that a sufficiently up-to-date version
-// of the legacy proto package is being used.
-const _ = proto.ProtoPackageIsVersion4
-
 // Type of domain value.
 type Domain_Type int32
 
@@ -515,6 +510,7 @@ type RoutingRule struct {
 	InboundTag     []string      `protobuf:"bytes,8,rep,name=inbound_tag,json=inboundTag,proto3" json:"inbound_tag,omitempty"`
 	Protocol       []string      `protobuf:"bytes,9,rep,name=protocol,proto3" json:"protocol,omitempty"`
 	Attributes     string        `protobuf:"bytes,15,opt,name=attributes,proto3" json:"attributes,omitempty"`
+	DomainMatcher  string        `protobuf:"bytes,17,opt,name=domain_matcher,json=domainMatcher,proto3" json:"domain_matcher,omitempty"`
 }
 
 func (x *RoutingRule) Reset() {
@@ -672,6 +668,13 @@ func (x *RoutingRule) GetAttributes() string {
 	return ""
 }
 
+func (x *RoutingRule) GetDomainMatcher() string {
+	if x != nil {
+		return x.DomainMatcher
+	}
+	return ""
+}
+
 type isRoutingRule_TargetTag interface {
 	isRoutingRule_TargetTag()
 }
@@ -946,7 +949,7 @@ var file_app_router_config_proto_rawDesc = []byte{
 	0x74, 0x12, 0x2e, 0x0a, 0x05, 0x65, 0x6e, 0x74, 0x72, 0x79, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b,
 	0x32, 0x18, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x72, 0x6f, 0x75, 0x74,
 	0x65, 0x72, 0x2e, 0x47, 0x65, 0x6f, 0x53, 0x69, 0x74, 0x65, 0x52, 0x05, 0x65, 0x6e, 0x74, 0x72,
-	0x79, 0x22, 0x8e, 0x06, 0x0a, 0x0b, 0x52, 0x6f, 0x75, 0x74, 0x69, 0x6e, 0x67, 0x52, 0x75, 0x6c,
+	0x79, 0x22, 0xb5, 0x06, 0x0a, 0x0b, 0x52, 0x6f, 0x75, 0x74, 0x69, 0x6e, 0x67, 0x52, 0x75, 0x6c,
 	0x65, 0x12, 0x12, 0x0a, 0x03, 0x74, 0x61, 0x67, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x48, 0x00,
 	0x52, 0x03, 0x74, 0x61, 0x67, 0x12, 0x25, 0x0a, 0x0d, 0x62, 0x61, 0x6c, 0x61, 0x6e, 0x63, 0x69,
 	0x6e, 0x67, 0x5f, 0x74, 0x61, 0x67, 0x18, 0x0c, 0x20, 0x01, 0x28, 0x09, 0x48, 0x00, 0x52, 0x0c,
@@ -994,36 +997,38 @@ var file_app_router_config_proto_rawDesc = []byte{
 	0x6f, 0x63, 0x6f, 0x6c, 0x18, 0x09, 0x20, 0x03, 0x28, 0x09, 0x52, 0x08, 0x70, 0x72, 0x6f, 0x74,
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+	0x72, 0x2e, 0x42, 0x61, 0x6c, 0x61, 0x6e, 0x63, 0x69, 0x6e, 0x67, 0x52, 0x75, 0x6c, 0x65, 0x52,
+	0x0d, 0x62, 0x61, 0x6c, 0x61, 0x6e, 0x63, 0x69, 0x6e, 0x67, 0x52, 0x75, 0x6c, 0x65, 0x22, 0x47,
+	0x0a, 0x0e, 0x44, 0x6f, 0x6d, 0x61, 0x69, 0x6e, 0x53, 0x74, 0x72, 0x61, 0x74, 0x65, 0x67, 0x79,
+	0x12, 0x08, 0x0a, 0x04, 0x41, 0x73, 0x49, 0x73, 0x10, 0x00, 0x12, 0x09, 0x0a, 0x05, 0x55, 0x73,
+	0x65, 0x49, 0x70, 0x10, 0x01, 0x12, 0x10, 0x0a, 0x0c, 0x49, 0x70, 0x49, 0x66, 0x4e, 0x6f, 0x6e,
+	0x4d, 0x61, 0x74, 0x63, 0x68, 0x10, 0x02, 0x12, 0x0e, 0x0a, 0x0a, 0x49, 0x70, 0x4f, 0x6e, 0x44,
+	0x65, 0x6d, 0x61, 0x6e, 0x64, 0x10, 0x03, 0x42, 0x4f, 0x0a, 0x13, 0x63, 0x6f, 0x6d, 0x2e, 0x78,
+	0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x72, 0x6f, 0x75, 0x74, 0x65, 0x72, 0x50, 0x01,
+	0x5a, 0x24, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c,
+	0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x61, 0x70, 0x70, 0x2f,
+	0x72, 0x6f, 0x75, 0x74, 0x65, 0x72, 0xaa, 0x02, 0x0f, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x41, 0x70,
+	0x70, 0x2e, 0x52, 0x6f, 0x75, 0x74, 0x65, 0x72, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/app/router/config.proto b/app/router/config.proto
index c5e655ad..8877c657 100644
--- a/app/router/config.proto
+++ b/app/router/config.proto
@@ -119,6 +119,8 @@ message RoutingRule {
   repeated string protocol = 9;
 
   string attributes = 15;
+
+  string domain_matcher = 17;
 }
 
 message BalancingRule {
diff --git a/common/protocol/tls/sniff.go b/common/protocol/tls/sniff.go
index f3806a05..a8fec15f 100644
--- a/common/protocol/tls/sniff.go
+++ b/common/protocol/tls/sniff.go
@@ -102,7 +102,7 @@ func ReadClientHello(data []byte, h *SniffHeader) error {
 					return errNotClientHello
 				}
 				if nameType == 0 {
-					serverName := strings.ToLower(string(d[:nameLen]))
+					serverName := string(d[:nameLen])
 					// An SNI value may not include a
 					// trailing dot. See
 					// https://tools.ietf.org/html/rfc6066#section-3.
diff --git a/common/strmatcher/ac_automaton_matcher.go b/common/strmatcher/ac_automaton_matcher.go
new file mode 100644
index 00000000..e21364ec
--- /dev/null
+++ b/common/strmatcher/ac_automaton_matcher.go
@@ -0,0 +1,243 @@
+package strmatcher
+
+import (
+	"container/list"
+)
+
+const validCharCount = 53
+
+type MatchType struct {
+	matchType Type
+	exist     bool
+}
+
+const (
+	TrieEdge bool = true
+	FailEdge bool = false
+)
+
+type Edge struct {
+	edgeType bool
+	nextNode int
+}
+
+type ACAutomaton struct {
+	trie   [][validCharCount]Edge
+	fail   []int
+	exists []MatchType
+	count  int
+}
+
+func newNode() [validCharCount]Edge {
+	var s [validCharCount]Edge
+	for i := range s {
+		s[i] = Edge{
+			edgeType: FailEdge,
+			nextNode: 0,
+		}
+	}
+	return s
+}
+
+var char2Index = []int{
+	'A':  0,
+	'a':  0,
+	'B':  1,
+	'b':  1,
+	'C':  2,
+	'c':  2,
+	'D':  3,
+	'd':  3,
+	'E':  4,
+	'e':  4,
+	'F':  5,
+	'f':  5,
+	'G':  6,
+	'g':  6,
+	'H':  7,
+	'h':  7,
+	'I':  8,
+	'i':  8,
+	'J':  9,
+	'j':  9,
+	'K':  10,
+	'k':  10,
+	'L':  11,
+	'l':  11,
+	'M':  12,
+	'm':  12,
+	'N':  13,
+	'n':  13,
+	'O':  14,
+	'o':  14,
+	'P':  15,
+	'p':  15,
+	'Q':  16,
+	'q':  16,
+	'R':  17,
+	'r':  17,
+	'S':  18,
+	's':  18,
+	'T':  19,
+	't':  19,
+	'U':  20,
+	'u':  20,
+	'V':  21,
+	'v':  21,
+	'W':  22,
+	'w':  22,
+	'X':  23,
+	'x':  23,
+	'Y':  24,
+	'y':  24,
+	'Z':  25,
+	'z':  25,
+	'!':  26,
+	'$':  27,
+	'&':  28,
+	'\'': 29,
+	'(':  30,
+	')':  31,
+	'*':  32,
+	'+':  33,
+	',':  34,
+	';':  35,
+	'=':  36,
+	':':  37,
+	'%':  38,
+	'-':  39,
+	'.':  40,
+	'_':  41,
+	'~':  42,
+	'0':  43,
+	'1':  44,
+	'2':  45,
+	'3':  46,
+	'4':  47,
+	'5':  48,
+	'6':  49,
+	'7':  50,
+	'8':  51,
+	'9':  52,
+}
+
+func NewACAutomaton() *ACAutomaton {
+	var ac = new(ACAutomaton)
+	ac.trie = append(ac.trie, newNode())
+	ac.fail = append(ac.fail, 0)
+	ac.exists = append(ac.exists, MatchType{
+		matchType: Full,
+		exist:     false,
+	})
+	return ac
+}
+
+func (ac *ACAutomaton) Add(domain string, t Type) {
+	var node = 0
+	for i := len(domain) - 1; i >= 0; i-- {
+		var idx = char2Index[domain[i]]
+		if ac.trie[node][idx].nextNode == 0 {
+			ac.count++
+			if len(ac.trie) < ac.count+1 {
+				ac.trie = append(ac.trie, newNode())
+				ac.fail = append(ac.fail, 0)
+				ac.exists = append(ac.exists, MatchType{
+					matchType: Full,
+					exist:     false,
+				})
+			}
+			ac.trie[node][idx] = Edge{
+				edgeType: TrieEdge,
+				nextNode: ac.count,
+			}
+		}
+		node = ac.trie[node][idx].nextNode
+	}
+	ac.exists[node] = MatchType{
+		matchType: t,
+		exist:     true,
+	}
+	switch t {
+	case Domain:
+		ac.exists[node] = MatchType{
+			matchType: Full,
+			exist:     true,
+		}
+		var idx = char2Index['.']
+		if ac.trie[node][idx].nextNode == 0 {
+			ac.count++
+			if len(ac.trie) < ac.count+1 {
+				ac.trie = append(ac.trie, newNode())
+				ac.fail = append(ac.fail, 0)
+				ac.exists = append(ac.exists, MatchType{
+					matchType: Full,
+					exist:     false,
+				})
+			}
+			ac.trie[node][idx] = Edge{
+				edgeType: TrieEdge,
+				nextNode: ac.count,
+			}
+		}
+		node = ac.trie[node][idx].nextNode
+		ac.exists[node] = MatchType{
+			matchType: t,
+			exist:     true,
+		}
+	default:
+		break
+	}
+}
+
+func (ac *ACAutomaton) Build() {
+	var queue = list.New()
+	for i := 0; i < validCharCount; i++ {
+		if ac.trie[0][i].nextNode != 0 {
+			queue.PushBack(ac.trie[0][i])
+		}
+	}
+	for {
+		var front = queue.Front()
+		if front == nil {
+			break
+		} else {
+			var node = front.Value.(Edge).nextNode
+			queue.Remove(front)
+			for i := 0; i < validCharCount; i++ {
+				if ac.trie[node][i].nextNode != 0 {
+					ac.fail[ac.trie[node][i].nextNode] = ac.trie[ac.fail[node]][i].nextNode
+					queue.PushBack(ac.trie[node][i])
+				} else {
+					ac.trie[node][i] = Edge{
+						edgeType: FailEdge,
+						nextNode: ac.trie[ac.fail[node]][i].nextNode,
+					}
+				}
+			}
+		}
+	}
+}
+
+func (ac *ACAutomaton) Match(s string) bool {
+	var node = 0
+	var fullMatch = true
+	// 1. the match string is all through trie edge. FULL MATCH or DOMAIN
+	// 2. the match string is through a fail edge. NOT FULL MATCH
+	// 2.1 Through a fail edge, but there exists a valid node. SUBSTR
+	for i := len(s) - 1; i >= 0; i-- {
+		var idx = char2Index[s[i]]
+		fullMatch = fullMatch && ac.trie[node][idx].edgeType
+		node = ac.trie[node][idx].nextNode
+		switch ac.exists[node].matchType {
+		case Substr:
+			return true
+		case Domain:
+			if fullMatch {
+				return true
+			}
+		default:
+			break
+		}
+	}
+	return fullMatch && ac.exists[node].exist
+}
diff --git a/common/strmatcher/benchmark_test.go b/common/strmatcher/benchmark_test.go
index 3e70ca04..9d09140c 100644
--- a/common/strmatcher/benchmark_test.go
+++ b/common/strmatcher/benchmark_test.go
@@ -8,6 +8,19 @@ import (
 	. "github.com/xtls/xray-core/common/strmatcher"
 )
 
+func BenchmarkACAutomaton(b *testing.B) {
+	ac := NewACAutomaton()
+	for i := 1; i <= 1024; i++ {
+		ac.Add(strconv.Itoa(i)+".v2ray.com", Domain)
+	}
+	ac.Build()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_ = ac.Match("0.v2ray.com")
+	}
+}
+
 func BenchmarkDomainMatcherGroup(b *testing.B) {
 	g := new(DomainMatcherGroup)
 
diff --git a/common/strmatcher/mph_matcher.go b/common/strmatcher/mph_matcher.go
new file mode 100644
index 00000000..21b98e76
--- /dev/null
+++ b/common/strmatcher/mph_matcher.go
@@ -0,0 +1,301 @@
+package strmatcher
+
+import (
+	"math/bits"
+	"regexp"
+	"sort"
+	"strings"
+	"unsafe"
+)
+
+// PrimeRK is the prime base used in Rabin-Karp algorithm.
+const PrimeRK = 16777619
+
+// calculate the rolling murmurHash of given string
+func RollingHash(s string) uint32 {
+	h := uint32(0)
+	for i := len(s) - 1; i >= 0; i-- {
+		h = h*PrimeRK + uint32(s[i])
+	}
+	return h
+}
+
+// A MphMatcherGroup is divided into three parts:
+// 1. `full` and `domain` patterns are matched by Rabin-Karp algorithm and minimal perfect hash table;
+// 2. `substr` patterns are matched by ac automaton;
+// 3. `regex` patterns are matched with the regex library.
+type MphMatcherGroup struct {
+	ac            *ACAutomaton
+	otherMatchers []matcherEntry
+	rules         []string
+	level0        []uint32
+	level0Mask    int
+	level1        []uint32
+	level1Mask    int
+	count         uint32
+	ruleMap       *map[string]uint32
+}
+
+func (g *MphMatcherGroup) AddFullOrDomainPattern(pattern string, t Type) {
+	h := RollingHash(pattern)
+	switch t {
+	case Domain:
+		(*g.ruleMap)["."+pattern] = h*PrimeRK + uint32('.')
+		fallthrough
+	case Full:
+		(*g.ruleMap)[pattern] = h
+	default:
+	}
+}
+
+func NewMphMatcherGroup() *MphMatcherGroup {
+	return &MphMatcherGroup{
+		ac:            nil,
+		otherMatchers: nil,
+		rules:         nil,
+		level0:        nil,
+		level0Mask:    0,
+		level1:        nil,
+		level1Mask:    0,
+		count:         1,
+		ruleMap:       &map[string]uint32{},
+	}
+}
+
+// AddPattern adds a pattern to MphMatcherGroup
+func (g *MphMatcherGroup) AddPattern(pattern string, t Type) (uint32, error) {
+	switch t {
+	case Substr:
+		if g.ac == nil {
+			g.ac = NewACAutomaton()
+		}
+		g.ac.Add(pattern, t)
+	case Full, Domain:
+		pattern = strings.ToLower(pattern)
+		g.AddFullOrDomainPattern(pattern, t)
+	case Regex:
+		r, err := regexp.Compile(pattern)
+		if err != nil {
+			return 0, err
+		}
+		g.otherMatchers = append(g.otherMatchers, matcherEntry{
+			m:  &regexMatcher{pattern: r},
+			id: g.count,
+		})
+	default:
+		panic("Unknown type")
+	}
+	return g.count, nil
+}
+
+// Build builds a minimal perfect hash table and ac automaton from insert rules
+func (g *MphMatcherGroup) Build() {
+	if g.ac != nil {
+		g.ac.Build()
+	}
+	keyLen := len(*g.ruleMap)
+	if keyLen == 0 {
+		keyLen = 1
+		(*g.ruleMap)["empty___"] = RollingHash("empty___")
+	}
+	g.level0 = make([]uint32, nextPow2(keyLen/4))
+	g.level0Mask = len(g.level0) - 1
+	g.level1 = make([]uint32, nextPow2(keyLen))
+	g.level1Mask = len(g.level1) - 1
+	var sparseBuckets = make([][]int, len(g.level0))
+	var ruleIdx int
+	for rule, hash := range *g.ruleMap {
+		n := int(hash) & g.level0Mask
+		g.rules = append(g.rules, rule)
+		sparseBuckets[n] = append(sparseBuckets[n], ruleIdx)
+		ruleIdx++
+	}
+	g.ruleMap = nil
+	var buckets []indexBucket
+	for n, vals := range sparseBuckets {
+		if len(vals) > 0 {
+			buckets = append(buckets, indexBucket{n, vals})
+		}
+	}
+	sort.Sort(bySize(buckets))
+
+	occ := make([]bool, len(g.level1))
+	var tmpOcc []int
+	for _, bucket := range buckets {
+		var seed = uint32(0)
+		for {
+			findSeed := true
+			tmpOcc = tmpOcc[:0]
+			for _, i := range bucket.vals {
+				n := int(strhashFallback(unsafe.Pointer(&g.rules[i]), uintptr(seed))) & g.level1Mask
+				if occ[n] {
+					for _, n := range tmpOcc {
+						occ[n] = false
+					}
+					seed++
+					findSeed = false
+					break
+				}
+				occ[n] = true
+				tmpOcc = append(tmpOcc, n)
+				g.level1[n] = uint32(i)
+			}
+			if findSeed {
+				g.level0[bucket.n] = seed
+				break
+			}
+		}
+	}
+}
+
+func nextPow2(v int) int {
+	if v <= 1 {
+		return 1
+	}
+	const MaxUInt = ^uint(0)
+	n := (MaxUInt >> bits.LeadingZeros(uint(v))) + 1
+	return int(n)
+}
+
+// Lookup searches for s in t and returns its index and whether it was found.
+func (g *MphMatcherGroup) Lookup(h uint32, s string) bool {
+	i0 := int(h) & g.level0Mask
+	seed := g.level0[i0]
+	i1 := int(strhashFallback(unsafe.Pointer(&s), uintptr(seed))) & g.level1Mask
+	n := g.level1[i1]
+	return s == g.rules[int(n)]
+}
+
+// Match implements IndexMatcher.Match.
+func (g *MphMatcherGroup) Match(pattern string) []uint32 {
+	result := []uint32{}
+	hash := uint32(0)
+	for i := len(pattern) - 1; i >= 0; i-- {
+		hash = hash*PrimeRK + uint32(pattern[i])
+		if pattern[i] == '.' {
+			if g.Lookup(hash, pattern[i:]) {
+				result = append(result, 1)
+				return result
+			}
+		}
+	}
+	if g.Lookup(hash, pattern) {
+		result = append(result, 1)
+		return result
+	}
+	if g.ac != nil && g.ac.Match(pattern) {
+		result = append(result, 1)
+		return result
+	}
+	for _, e := range g.otherMatchers {
+		if e.m.Match(pattern) {
+			result = append(result, e.id)
+			return result
+		}
+	}
+	return nil
+}
+
+type indexBucket struct {
+	n    int
+	vals []int
+}
+
+type bySize []indexBucket
+
+func (s bySize) Len() int           { return len(s) }
+func (s bySize) Less(i, j int) bool { return len(s[i].vals) > len(s[j].vals) }
+func (s bySize) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+
+type stringStruct struct {
+	str unsafe.Pointer
+	len int
+}
+
+func strhashFallback(a unsafe.Pointer, h uintptr) uintptr {
+	x := (*stringStruct)(a)
+	return memhashFallback(x.str, h, uintptr(x.len))
+}
+
+const (
+	// Constants for multiplication: four random odd 64-bit numbers.
+	m1 = 16877499708836156737
+	m2 = 2820277070424839065
+	m3 = 9497967016996688599
+	m4 = 15839092249703872147
+)
+
+var hashkey = [4]uintptr{1, 1, 1, 1}
+
+func memhashFallback(p unsafe.Pointer, seed, s uintptr) uintptr {
+	h := uint64(seed + s*hashkey[0])
+tail:
+	switch {
+	case s == 0:
+	case s < 4:
+		h ^= uint64(*(*byte)(p))
+		h ^= uint64(*(*byte)(add(p, s>>1))) << 8
+		h ^= uint64(*(*byte)(add(p, s-1))) << 16
+		h = rotl31(h*m1) * m2
+	case s <= 8:
+		h ^= uint64(readUnaligned32(p))
+		h ^= uint64(readUnaligned32(add(p, s-4))) << 32
+		h = rotl31(h*m1) * m2
+	case s <= 16:
+		h ^= readUnaligned64(p)
+		h = rotl31(h*m1) * m2
+		h ^= readUnaligned64(add(p, s-8))
+		h = rotl31(h*m1) * m2
+	case s <= 32:
+		h ^= readUnaligned64(p)
+		h = rotl31(h*m1) * m2
+		h ^= readUnaligned64(add(p, 8))
+		h = rotl31(h*m1) * m2
+		h ^= readUnaligned64(add(p, s-16))
+		h = rotl31(h*m1) * m2
+		h ^= readUnaligned64(add(p, s-8))
+		h = rotl31(h*m1) * m2
+	default:
+		v1 := h
+		v2 := uint64(seed * hashkey[1])
+		v3 := uint64(seed * hashkey[2])
+		v4 := uint64(seed * hashkey[3])
+		for s >= 32 {
+			v1 ^= readUnaligned64(p)
+			v1 = rotl31(v1*m1) * m2
+			p = add(p, 8)
+			v2 ^= readUnaligned64(p)
+			v2 = rotl31(v2*m2) * m3
+			p = add(p, 8)
+			v3 ^= readUnaligned64(p)
+			v3 = rotl31(v3*m3) * m4
+			p = add(p, 8)
+			v4 ^= readUnaligned64(p)
+			v4 = rotl31(v4*m4) * m1
+			p = add(p, 8)
+			s -= 32
+		}
+		h = v1 ^ v2 ^ v3 ^ v4
+		goto tail
+	}
+
+	h ^= h >> 29
+	h *= m3
+	h ^= h >> 32
+	return uintptr(h)
+}
+func add(p unsafe.Pointer, x uintptr) unsafe.Pointer {
+	return unsafe.Pointer(uintptr(p) + x)
+}
+func readUnaligned32(p unsafe.Pointer) uint32 {
+	q := (*[4]byte)(p)
+	return uint32(q[0]) | uint32(q[1])<<8 | uint32(q[2])<<16 | uint32(q[3])<<24
+}
+
+func rotl31(x uint64) uint64 {
+	return (x << 31) | (x >> (64 - 31))
+}
+func readUnaligned64(p unsafe.Pointer) uint64 {
+	q := (*[8]byte)(p)
+	return uint64(q[0]) | uint64(q[1])<<8 | uint64(q[2])<<16 | uint64(q[3])<<24 | uint64(q[4])<<32 | uint64(q[5])<<40 | uint64(q[6])<<48 | uint64(q[7])<<56
+}
diff --git a/common/strmatcher/strmatcher.go b/common/strmatcher/strmatcher.go
index 9728047d..294e6e73 100644
--- a/common/strmatcher/strmatcher.go
+++ b/common/strmatcher/strmatcher.go
@@ -27,6 +27,7 @@ const (
 
 // New creates a new Matcher based on the given pattern.
 func (t Type) New(pattern string) (Matcher, error) {
+	// 1. regex matching is case-sensitive
 	switch t {
 	case Full:
 		return fullMatcher(pattern), nil
diff --git a/common/strmatcher/strmatcher_test.go b/common/strmatcher/strmatcher_test.go
index 87d6c5b3..ec87ce5c 100644
--- a/common/strmatcher/strmatcher_test.go
+++ b/common/strmatcher/strmatcher_test.go
@@ -91,3 +91,172 @@ func TestMatcherGroup(t *testing.T) {
 		}
 	}
 }
+
+func TestACAutomaton(t *testing.T) {
+	cases1 := []struct {
+		pattern string
+		mType   Type
+		input   string
+		output  bool
+	}{
+		{
+			pattern: "xtls.github.io",
+			mType:   Domain,
+			input:   "www.xtls.github.io",
+			output:  true,
+		},
+		{
+			pattern: "xtls.github.io",
+			mType:   Domain,
+			input:   "xtls.github.io",
+			output:  true,
+		},
+		{
+			pattern: "xtls.github.io",
+			mType:   Domain,
+			input:   "www.xtis.github.io",
+			output:  false,
+		},
+		{
+			pattern: "xtls.github.io",
+			mType:   Domain,
+			input:   "tls.github.io",
+			output:  false,
+		},
+		{
+			pattern: "xtls.github.io",
+			mType:   Domain,
+			input:   "xxtls.github.io",
+			output:  false,
+		},
+		{
+			pattern: "xtls.github.io",
+			mType:   Full,
+			input:   "xtls.github.io",
+			output:  true,
+		},
+		{
+			pattern: "xtls.github.io",
+			mType:   Full,
+			input:   "xxtls.github.io",
+			output:  false,
+		},
+	}
+	for _, test := range cases1 {
+		var ac = NewACAutomaton()
+		ac.Add(test.pattern, test.mType)
+		ac.Build()
+		if m := ac.Match(test.input); m != test.output {
+			t.Error("unexpected output: ", m, " for test case ", test)
+		}
+	}
+	{
+		cases2Input := []struct {
+			pattern string
+			mType   Type
+		}{
+			{
+				pattern: "163.com",
+				mType:   Domain,
+			},
+			{
+				pattern: "m.126.com",
+				mType:   Full,
+			},
+			{
+				pattern: "3.com",
+				mType:   Full,
+			},
+			{
+				pattern: "google.com",
+				mType:   Substr,
+			},
+			{
+				pattern: "vgoogle.com",
+				mType:   Substr,
+			},
+		}
+		var ac = NewACAutomaton()
+		for _, test := range cases2Input {
+			ac.Add(test.pattern, test.mType)
+		}
+		ac.Build()
+		cases2Output := []struct {
+			pattern string
+			res     bool
+		}{
+			{
+				pattern: "126.com",
+				res:     false,
+			},
+			{
+				pattern: "m.163.com",
+				res:     true,
+			},
+			{
+				pattern: "mm163.com",
+				res:     false,
+			},
+			{
+				pattern: "m.126.com",
+				res:     true,
+			},
+			{
+				pattern: "163.com",
+				res:     true,
+			},
+			{
+				pattern: "63.com",
+				res:     false,
+			},
+			{
+				pattern: "oogle.com",
+				res:     false,
+			},
+			{
+				pattern: "vvgoogle.com",
+				res:     true,
+			},
+		}
+		for _, test := range cases2Output {
+			if m := ac.Match(test.pattern); m != test.res {
+				t.Error("unexpected output: ", m, " for test case ", test)
+			}
+		}
+	}
+
+	{
+		cases3Input := []struct {
+			pattern string
+			mType   Type
+		}{
+			{
+				pattern: "video.google.com",
+				mType:   Domain,
+			},
+			{
+				pattern: "gle.com",
+				mType:   Domain,
+			},
+		}
+		var ac = NewACAutomaton()
+		for _, test := range cases3Input {
+			ac.Add(test.pattern, test.mType)
+		}
+		ac.Build()
+		cases3Output := []struct {
+			pattern string
+			res     bool
+		}{
+			{
+				pattern: "google.com",
+				res:     false,
+			},
+		}
+		for _, test := range cases3Output {
+			if m := ac.Match(test.pattern); m != test.res {
+				t.Error("unexpected output: ", m, " for test case ", test)
+			}
+		}
+	}
+}
diff --git a/infra/conf/router.go b/infra/conf/router.go
index a93da6b1..abed22c6 100644
--- a/infra/conf/router.go
+++ b/infra/conf/router.go
@@ -98,6 +98,8 @@ type RouterRule struct {
 	Type        string `json:"type"`
 	OutboundTag string `json:"outboundTag"`
 	BalancerTag string `json:"balancerTag"`
+
+	DomainMatcher string `json:"domainMatcher"`
 }
 
 func ParseIP(s string) (*router.CIDR, error) {
@@ -491,6 +493,10 @@ func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
 		return nil, newError("neither outboundTag nor balancerTag is specified in routing rule")
 	}
 
+	if rawFieldRule.DomainMatcher != "" {
+		rule.DomainMatcher = rawFieldRule.DomainMatcher
+	}
+
 	if rawFieldRule.Domain != nil {
 		for _, domain := range *rawFieldRule.Domain {
 			rules, err := parseDomainRule(domain)