test for nil slice

match/any_of.go

@@ -27,10 +27,15 @@ func (self AnyOf) Index(s string, segments []int) (int, []int) {
 	index := -1
 
 	// create reusable segments
-	seg := acquireSegments(len(s))
+	//	seg := acquireSegments(len(s))
+	//	defer func() {
+	//		releaseSegments(seg)
+	//	}()
+	var seg []int
 
 	for _, m := range self.Matchers {
-		idx, seg := m.Index(s, seg[:0])
+		var idx int
+		idx, seg = m.Index(s, seg[:0])
 		if idx == -1 {
 			continue
 		}
@@ -49,8 +54,6 @@ func (self AnyOf) Index(s string, segments []int) (int, []int) {
 		segments = appendMerge(segments, seg)
 	}
 
-	releaseSegments(seg)
-
 	if index == -1 {
 		return -1, nil
 	}

match/btree.go

@@ -83,14 +83,16 @@ func (self BTree) Match(s string) bool {
 
 	// reusable segments list
 	// inputLen is the maximum size of output segments values
-	segments := acquireSegments(inputLen)
-	defer func() {
-		releaseSegments(segments)
-	}()
+	//	segments := acquireSegments(inputLen)
+	//	defer func() {
+	//		releaseSegments(segments)
+	//	}()
+	var segments []int
 
 	for offset < limit {
 		// search for matching part in substring
-		index, segments := self.Value.Index(s[offset:limit], segments[:0])
+		var index int
+		index, segments = self.Value.Index(s[offset:limit], segments[:0])
 		if index == -1 {
 			return false
 		}

match/every_of.go

@@ -31,19 +31,24 @@ func (self EveryOf) Index(s string, out []int) (int, []int) {
 
 	// make `in` with cap as len(s),
 	// cause it is the maximum size of output segments values
-	seg := acquireSegments(len(s))
-	next := acquireSegments(len(s))
-	current := acquireSegments(len(s))
-
-	defer func() {
-		releaseSegments(seg)
-		releaseSegments(next)
-		releaseSegments(current)
-	}()
+	//	seg := acquireSegments(len(s))
+	//	next := acquireSegments(len(s))
+	//	current := acquireSegments(len(s))
+	//	defer func() {
+	//		releaseSegments(seg)
+	//		releaseSegments(next)
+	//		releaseSegments(current)
+	//	}()
+	var (
+		seg     []int
+		next    []int
+		current []int
+	)
 
 	sub := s
 	for i, m := range self.Matchers {
-		idx, seg := m.Index(sub, seg[:0])
+		var idx int
+		idx, seg = m.Index(sub, seg[:0])
 		if idx == -1 {
 			return -1, nil
 		}

match/match.go

@@ -54,7 +54,7 @@ func init() {
 		func(i int) {
 			segmentsPools[i-1] = sync.Pool{
 				New: func() interface{} {
-					fmt.Println("new", i)
+					//					fmt.Println("new", i)
 					return make([]int, 0, i)
 				},
 			}