diff --git a/cmd/php-parser/main.go b/cmd/php-parser/main.go
index 06b11a2..557f699 100644
--- a/cmd/php-parser/main.go
+++ b/cmd/php-parser/main.go
@@ -10,6 +10,7 @@ import (
 	"path/filepath"
 	"runtime"
 	"sync"
+	"time"
 
 	"github.com/pkg/profile"
 	"github.com/yookoala/realpath"
@@ -28,6 +29,7 @@ var withFreeFloating *bool
 var showResolvedNs *bool
 var printBack *bool
 var printPath *bool
+var printExecTime *bool
 
 type file struct {
 	path    string
@@ -40,6 +42,9 @@ type result struct {
 }
 
 func main() {
+	start := time.Now()
+
+	printExecTime = flag.Bool("time", false, "print execution time")
 	withFreeFloating = flag.Bool("ff", false, "parse and show free floating strings")
 	showResolvedNs = flag.Bool("r", false, "resolve names")
 	printBack = flag.Bool("pb", false, "print AST back into the parsed file")
@@ -84,6 +89,11 @@ func main() {
 	wg.Wait()
 	close(fileCh)
 	close(resultCh)
+
+	elapsed := time.Since(start)
+	if *printExecTime {
+		log.Printf("took: %s", elapsed)
+	}
 }
 
 func processPath(pathList []string, fileCh chan<- *file) {
diff --git a/internal/php5/parser.go b/internal/php5/parser.go
index c0e2ac4..fe3e295 100644
--- a/internal/php5/parser.go
+++ b/internal/php5/parser.go
@@ -41,41 +41,41 @@ func NewParser(src []byte, v string, withTokens bool) *Parser {
 }
 
 // Lex proxy to scanner Lex
-func (l *Parser) Lex(lval *yySymType) int {
-	t := l.Lexer.Lex()
+func (p *Parser) Lex(lval *yySymType) int {
+	t := p.Lexer.Lex()
 
-	l.currentToken = t
+	p.currentToken = t
 	lval.token = t
 
 	return int(t.ID)
 }
 
-func (l *Parser) Error(msg string) {
-	var pos = l.currentToken.Position
+func (p *Parser) Error(msg string) {
+	var pos = p.currentToken.Position
 
-	l.errors = append(l.errors, errors.NewError(msg, &pos))
+	p.errors = append(p.errors, errors.NewError(msg, &pos))
 }
 
 // GetErrors returns errors list
-func (l *Parser) GetErrors() []*errors.Error {
-	return l.errors
+func (p *Parser) GetErrors() []*errors.Error {
+	return p.errors
 }
 
 // Parse the php7 Parser entrypoint
-func (l *Parser) Parse() int {
+func (p *Parser) Parse() int {
 	// init
-	l.errors = nil
-	l.rootNode = nil
-	l.positionBuilder = &positionbuilder.PositionBuilder{}
+	p.errors = nil
+	p.rootNode = nil
+	p.positionBuilder = &positionbuilder.PositionBuilder{}
 
 	// parse
 
-	return yyParse(l)
+	return yyParse(p)
 }
 
 // GetRootNode returns root node
-func (l *Parser) GetRootNode() ast.Vertex {
-	return l.rootNode
+func (p *Parser) GetRootNode() ast.Vertex {
+	return p.rootNode
 }
 
 // helpers
@@ -87,16 +87,12 @@ func lastNode(nn []ast.Vertex) ast.Vertex {
 	return nn[len(nn)-1]
 }
 
-func firstNode(nn []ast.Vertex) ast.Vertex {
-	return nn[0]
-}
-
 func isDollar(r rune) bool {
 	return r == '$'
 }
 
-func (l *Parser) MoveFreeFloating(src ast.Vertex, dst ast.Vertex) {
-	if l.withTokens == false {
+func (p *Parser) MoveFreeFloating(src ast.Vertex, dst ast.Vertex) {
+	if p.withTokens == false {
 		return
 	}
 
@@ -104,12 +100,12 @@ func (l *Parser) MoveFreeFloating(src ast.Vertex, dst ast.Vertex) {
 		return
 	}
 
-	l.setFreeFloating(dst, token.Start, src.GetNode().Tokens[token.Start])
+	p.setFreeFloating(dst, token.Start, src.GetNode().Tokens[token.Start])
 	delete(src.GetNode().Tokens, token.Start)
 }
 
-func (l *Parser) setFreeFloating(dst ast.Vertex, p token.Position, strings []token.Token) {
-	if l.withTokens == false {
+func (p *Parser) setFreeFloating(dst ast.Vertex, pos token.Position, strings []token.Token) {
+	if p.withTokens == false {
 		return
 	}
 
@@ -122,11 +118,11 @@ func (l *Parser) setFreeFloating(dst ast.Vertex, p token.Position, strings []tok
 		*dstCollection = make(token.Collection)
 	}
 
-	(*dstCollection)[p] = strings
+	(*dstCollection)[pos] = strings
 }
 
-func (l *Parser) GetFreeFloatingToken(t *scanner.Token) []token.Token {
-	if l.withTokens == false {
+func (p *Parser) GetFreeFloatingToken(t *scanner.Token) []token.Token {
+	if p.withTokens == false {
 		return []token.Token{}
 	}
 
@@ -138,12 +134,12 @@ func (l *Parser) GetFreeFloatingToken(t *scanner.Token) []token.Token {
 	}
 }
 
-func (l *Parser) addDollarToken(v ast.Vertex) {
-	if l.withTokens == false {
+func (p *Parser) addDollarToken(v ast.Vertex) {
+	if p.withTokens == false {
 		return
 	}
 
-	l.setFreeFloating(v, token.Dollar, []token.Token{
+	p.setFreeFloating(v, token.Dollar, []token.Token{
 		{
 			ID:    token.ID('$'),
 			Value: []byte("$"),
@@ -151,8 +147,8 @@ func (l *Parser) addDollarToken(v ast.Vertex) {
 	})
 }
 
-func (l *Parser) splitSemiColonAndPhpCloseTag(htmlNode ast.Vertex, prevNode ast.Vertex) {
-	if l.withTokens == false {
+func (p *Parser) splitSemiColonAndPhpCloseTag(htmlNode ast.Vertex, prevNode ast.Vertex) {
+	if p.withTokens == false {
 		return
 	}
 
@@ -163,7 +159,7 @@ func (l *Parser) splitSemiColonAndPhpCloseTag(htmlNode ast.Vertex, prevNode ast.
 	}
 
 	if semiColon[0].Value[0] == ';' {
-		l.setFreeFloating(prevNode, token.SemiColon, []token.Token{
+		p.setFreeFloating(prevNode, token.SemiColon, []token.Token{
 			{
 				ID:    token.ID(';'),
 				Value: semiColon[0].Value[0:1],
@@ -192,7 +188,7 @@ func (l *Parser) splitSemiColonAndPhpCloseTag(htmlNode ast.Vertex, prevNode ast.
 		Value: semiColon[0].Value[vlen-tlen:],
 	})
 
-	l.setFreeFloating(htmlNode, token.Start, append(phpCloseTag, htmlNode.GetNode().Tokens[token.Start]...))
+	p.setFreeFloating(htmlNode, token.Start, append(phpCloseTag, htmlNode.GetNode().Tokens[token.Start]...))
 }
 
 func (p *Parser) returnTokenToPool(yyDollar []yySymType, yyVAL *yySymType) {
diff --git a/internal/php7/parser.go b/internal/php7/parser.go
index f34ddc4..1b3c0a6 100644
--- a/internal/php7/parser.go
+++ b/internal/php7/parser.go
@@ -85,10 +85,6 @@ func lastNode(nn []ast.Vertex) ast.Vertex {
 	return nn[len(nn)-1]
 }
 
-func firstNode(nn []ast.Vertex) ast.Vertex {
-	return nn[0]
-}
-
 func isDollar(r rune) bool {
 	return r == '$'
 }
@@ -106,8 +102,8 @@ func (l *Parser) MoveFreeFloating(src ast.Vertex, dst ast.Vertex) {
 	delete(src.GetNode().Tokens, token.Start)
 }
 
-func (l *Parser) setFreeFloating(dst ast.Vertex, p token.Position, strings []token.Token) {
-	if l.withTokens == false {
+func (p *Parser) setFreeFloating(dst ast.Vertex, pos token.Position, strings []token.Token) {
+	if p.withTokens == false {
 		return
 	}
 
@@ -120,7 +116,7 @@ func (l *Parser) setFreeFloating(dst ast.Vertex, p token.Position, strings []tok
 		*dstCollection = make(token.Collection)
 	}
 
-	(*dstCollection)[p] = strings
+	(*dstCollection)[pos] = strings
 }
 
 func (l *Parser) GetFreeFloatingToken(t *scanner.Token) []token.Token {