remove acquire

match/any_of.go

@@ -25,29 +25,28 @@ func (self AnyOf) Match(s string) bool {
 
 func (self AnyOf) Index(s string, segments []int) (int, []int) {
 	index := -1
+
+	// create reusable segments
+	in := make([]int, 0, len(s))
+
 	for _, m := range self.Matchers {
-		in := acquireSegments(len(s))
-		idx, seg := m.Index(s, in)
+		idx, seg := m.Index(s, in[:0])
 		if idx == -1 {
-			releaseSegments(in)
 			continue
 		}
 
 		if index == -1 || idx < index {
 			index = idx
 			segments = append(segments[:0], seg...)
-			releaseSegments(in)
 			continue
 		}
 
 		if idx > index {
-			releaseSegments(in)
 			continue
 		}
 
 		// here idx == index
 		segments = appendMerge(segments, seg)
-		releaseSegments(in)
 	}
 
 	if index == -1 {

match/any_test.go

@@ -33,15 +33,13 @@ func TestAnyIndex(t *testing.T) {
 		if !reflect.DeepEqual(segments, test.segments) {
 			t.Errorf("#%d unexpected segments: exp: %v, act: %v", id, test.segments, segments)
 		}
-
-		releaseSegments(segments)
 	}
 }
 
 func BenchmarkIndexAny(b *testing.B) {
 	m := Any{bench_separators}
 
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
 	}
@@ -49,7 +47,7 @@ func BenchmarkIndexAny(b *testing.B) {
 
 func BenchmarkIndexAnyParallel(b *testing.B) {
 	m := Any{bench_separators}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {

match/btree.go

@@ -77,13 +77,14 @@ func (self BTree) Match(s string) bool {
 		limit = inputLen
 	}
 
-	in := acquireSegments(inputLen)
+	// reusable segments list
+	// inputLen is the maximum size of output segments values
+	in := make([]int, 0, inputLen)
 
 	for offset < limit {
 		// search for matching part in substring
 		index, segments := self.Value.Index(s[offset:limit], in[:0])
 		if index == -1 {
-			releaseSegments(in)
 			return false
 		}
 
@@ -115,7 +116,6 @@ func (self BTree) Match(s string) bool {
 				}
 
 				if right {
-					releaseSegments(in)
 					return true
 				}
 			}
@@ -125,8 +125,6 @@ func (self BTree) Match(s string) bool {
 		offset += index + step
 	}
 
-	releaseSegments(in)
-
 	return false
 }
 

match/contains_test.go

@@ -56,7 +56,7 @@ func TestContainsIndex(t *testing.T) {
 func BenchmarkIndexContains(b *testing.B) {
 	m := Contains{string(bench_separators), true}
 
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
 	}
@@ -64,7 +64,7 @@ func BenchmarkIndexContains(b *testing.B) {
 
 func BenchmarkIndexContainsParallel(b *testing.B) {
 	m := Contains{string(bench_separators), true}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {

match/every_of.go

@@ -25,35 +25,32 @@ func (self EveryOf) Len() (l int) {
 	return
 }
 
-func max(a, b int) int {
-	if a >= b {
-		return a
-	}
-
-	return b
-}
-
 func (self EveryOf) Index(s string, out []int) (int, []int) {
 	var index int
 	var offset int
-	var current []int
+
+	// make `in` with cap as len(s),
+	// cause it is the maximum size of output segments values
+	in := make([]int, 0, len(s))
+	next := make([]int, 0, len(s))
+	current := make([]int, 0, len(s))
 
 	sub := s
 	for i, m := range self.Matchers {
-		in := acquireSegments(len(sub))
-		idx, seg := m.Index(sub, in)
+		idx, seg := m.Index(sub, in[:0])
 		if idx == -1 {
-			releaseSegments(in)
-			if cap(current) > 0 {
-				releaseSegments(current)
-			}
 			return -1, nil
 		}
 
-		next := acquireSegments(max(len(seg), len(current)))
 		if i == 0 {
-			next = append(next, seg...)
+			// we use copy here instead of `current = seg`
+			// cause seg is a slice from reusable buffer `in`
+			// and it could be overwritten in next iteration
+			current = append(current, seg...)
 		} else {
+			// clear the next
+			next = next[:0]
+
 			delta := index - (idx + offset)
 			for _, ex := range current {
 				for _, n := range seg {
@@ -62,27 +59,22 @@ func (self EveryOf) Index(s string, out []int) (int, []int) {
 					}
 				}
 			}
-		}
-
-		if cap(current) > 0 {
-			releaseSegments(current)
-		}
-		releaseSegments(in)
 
 			if len(next) == 0 {
-			releaseSegments(next)
 				return -1, nil
 			}
 
-		current = next
+			current = append(current[:0], next...)
+		}
 
 		index = idx + offset
 		sub = s[index:]
 		offset += idx
 	}
 
+	// copy result in `out` to prevent
+	// allocation `current` on heap
 	out = append(out, current...)
-	releaseSegments(current)
 
 	return index, out
 }

match/every_of_test.go

@@ -18,7 +18,7 @@ func TestEveryOfIndex(t *testing.T) {
 				NewText("b"),
 				NewText("c"),
 			},
-			"abc",
+			"dbc",
 			-1,
 			nil,
 		},

match/list_test.go

@@ -41,7 +41,7 @@ func TestListIndex(t *testing.T) {
 
 func BenchmarkIndexList(b *testing.B) {
 	m := List{[]rune("def"), false}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
@@ -50,7 +50,7 @@ func BenchmarkIndexList(b *testing.B) {
 
 func BenchmarkIndexListParallel(b *testing.B) {
 	m := List{[]rune("def"), false}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {

match/match.go

@@ -3,7 +3,6 @@ package match
 import (
 	"fmt"
 	"strings"
-	"sync"
 )
 
 const lenOne = 1
@@ -28,63 +27,10 @@ func (m Matchers) String() string {
 	return fmt.Sprintf("%s", strings.Join(s, ","))
 }
 
-var segmentsPools [1024]sync.Pool
-
-func toPowerOfTwo(v int) int {
-	v--
-	v |= v >> 1
-	v |= v >> 2
-	v |= v >> 4
-	v |= v >> 8
-	v |= v >> 16
-	v++
-
-	return v
-}
-
-const (
-	minSegment         = 32
-	minSegmentMinusOne = 31
-	maxSegment         = 1024
-	maxSegmentMinusOne = 1023
-)
-
-func init() {
-	for i := maxSegment; i >= minSegment; i >>= 1 {
-		func(i int) {
-			segmentsPools[i-1] = sync.Pool{
-				New: func() interface{} {
-					return make([]int, 0, i)
-				},
-			}
-		}(i)
-	}
-}
-
-func getIdx(c int) int {
-	p := toPowerOfTwo(c)
-	switch {
-	case p >= maxSegment:
-		return maxSegmentMinusOne
-	case p <= minSegment:
-		return minSegmentMinusOne
-	default:
-		return p - 1
-	}
-}
-
-func acquireSegments(c int) []int {
-	return segmentsPools[getIdx(c)].Get().([]int)[:0]
-}
-
-func releaseSegments(s []int) {
-	segmentsPools[getIdx(cap(s))].Put(s)
-}
-
 // appendMerge merges and sorts given already SORTED and UNIQUE segments.
 func appendMerge(target, sub []int) []int {
 	lt, ls := len(target), len(sub)
-	out := acquireSegments(lt + ls)
+	out := make([]int, 0, lt+ls)
 
 	for x, y := 0, 0; x < lt || y < ls; {
 		if x >= lt {
@@ -119,7 +65,6 @@ func appendMerge(target, sub []int) []int {
 	}
 
 	target = append(target[:0], out...)
-	releaseSegments(out)
 
 	return target
 }

match/max_test.go

@@ -38,7 +38,7 @@ func TestMaxIndex(t *testing.T) {
 
 func BenchmarkIndexMax(b *testing.B) {
 	m := Max{10}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
@@ -47,7 +47,7 @@ func BenchmarkIndexMax(b *testing.B) {
 
 func BenchmarkIndexMaxParallel(b *testing.B) {
 	m := Max{10}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {

match/min_test.go

@@ -38,7 +38,7 @@ func TestMinIndex(t *testing.T) {
 
 func BenchmarkIndexMin(b *testing.B) {
 	m := Min{10}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
@@ -47,7 +47,7 @@ func BenchmarkIndexMin(b *testing.B) {
 
 func BenchmarkIndexMinParallel(b *testing.B) {
 	m := Min{10}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {

match/nothing_test.go

@@ -35,7 +35,7 @@ func TestNothingIndex(t *testing.T) {
 
 func BenchmarkIndexNothing(b *testing.B) {
 	m := Nothing{}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
@@ -44,7 +44,7 @@ func BenchmarkIndexNothing(b *testing.B) {
 
 func BenchmarkIndexNothingParallel(b *testing.B) {
 	m := Nothing{}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {

match/prefix_suffix_test.go

@@ -48,7 +48,7 @@ func TestPrefixSuffixIndex(t *testing.T) {
 
 func BenchmarkIndexPrefixSuffix(b *testing.B) {
 	m := PrefixSuffix{"qew", "sqw"}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
@@ -57,7 +57,7 @@ func BenchmarkIndexPrefixSuffix(b *testing.B) {
 
 func BenchmarkIndexPrefixSuffixParallel(b *testing.B) {
 	m := PrefixSuffix{"qew", "sqw"}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {

match/prefix_test.go

@@ -38,7 +38,7 @@ func TestPrefixIndex(t *testing.T) {
 
 func BenchmarkIndexPrefix(b *testing.B) {
 	m := Prefix{"qew"}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
@@ -47,7 +47,7 @@ func BenchmarkIndexPrefix(b *testing.B) {
 
 func BenchmarkIndexPrefixParallel(b *testing.B) {
 	m := Prefix{"qew"}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {

match/range_test.go

@@ -48,7 +48,7 @@ func TestRangeIndex(t *testing.T) {
 
 func BenchmarkIndexRange(b *testing.B) {
 	m := Range{'0', '9', false}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
@@ -57,7 +57,7 @@ func BenchmarkIndexRange(b *testing.B) {
 
 func BenchmarkIndexRangeParallel(b *testing.B) {
 	m := Range{'0', '9', false}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {

match/row_test.go

@@ -59,7 +59,7 @@ func BenchmarkRowIndex(b *testing.B) {
 		},
 		RunesLength: 7,
 	}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
@@ -75,7 +75,7 @@ func BenchmarkIndexRowParallel(b *testing.B) {
 		},
 		RunesLength: 7,
 	}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {

match/single_test.go

@@ -38,7 +38,7 @@ func TestSingleIndex(t *testing.T) {
 
 func BenchmarkIndexSingle(b *testing.B) {
 	m := Single{bench_separators}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
@@ -47,7 +47,7 @@ func BenchmarkIndexSingle(b *testing.B) {
 
 func BenchmarkIndexSingleParallel(b *testing.B) {
 	m := Single{bench_separators}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {

match/suffix_test.go

@@ -38,7 +38,7 @@ func TestSuffixIndex(t *testing.T) {
 
 func BenchmarkIndexSuffix(b *testing.B) {
 	m := Suffix{"qwe"}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
@@ -47,7 +47,7 @@ func BenchmarkIndexSuffix(b *testing.B) {
 
 func BenchmarkIndexSuffixParallel(b *testing.B) {
 	m := Suffix{"qwe"}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {

match/super_test.go

@@ -35,7 +35,7 @@ func TestSuperIndex(t *testing.T) {
 
 func BenchmarkIndexSuper(b *testing.B) {
 	m := Super{}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
@@ -44,7 +44,7 @@ func BenchmarkIndexSuper(b *testing.B) {
 
 func BenchmarkIndexSuperParallel(b *testing.B) {
 	m := Super{}
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {

match/text_test.go

@@ -38,7 +38,7 @@ func TestTextIndex(t *testing.T) {
 
 func BenchmarkIndexText(b *testing.B) {
 	m := NewText("foo")
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	for i := 0; i < b.N; i++ {
 		m.Index(bench_pattern, in[:0])
@@ -47,7 +47,7 @@ func BenchmarkIndexText(b *testing.B) {
 
 func BenchmarkIndexTextParallel(b *testing.B) {
 	m := NewText("foo")
-	in := acquireSegments(len(bench_pattern))
+	in := make([]int, 0, len(bench_pattern))
 
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {