diff --git a/.gitignore b/.gitignore
index 66451b4..032c7f4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,7 @@
 php-parser
 *example.php
 
-cpu.prof
-mem.prof
+cpu.pprof
+mem.pprof
 php7.test
 php5.test
diff --git a/Makefile b/Makefile
index 4f0a311..14e7188 100644
--- a/Makefile
+++ b/Makefile
@@ -36,12 +36,12 @@ compile: ./php5/php5.go ./php7/php7.go ./scanner/scanner.go
 	goyacc -o $@ $<
 
 cpu_pprof:
-	GOGC=off go test -cpuprofile cpu.prof -bench=. -benchtime=20s ./php7
-	go tool pprof ./php7.test cpu.prof
+	GOGC=off go test -cpuprofile cpu.pprof -bench=. -benchtime=20s ./php7
+	go tool pprof ./php7.test cpu.pprof
 
 mem_pprof:
-	GOGC=off go test -memprofile mem.prof -bench=. -benchtime=20s -benchmem ./php7
-	go tool pprof -alloc_objects ./php7.test mem.prof
+	GOGC=off go test -memprofile mem.pprof -bench=. -benchtime=20s -benchmem ./php7
+	go tool pprof -alloc_objects ./php7.test mem.pprof
 
 cpu_pprof_php5:
 	GOGC=off go test -cpuprofile cpu.prof -bench=. -benchtime=20s ./php5
diff --git a/README.md b/README.md
index e4dbd19..0d3e482 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,7 @@ php-parser [flags] <path> ...
 | flag  | type |                description                   |
 |-------|------|----------------------------------------------|
 |  -d   |string| dump format: [custom, go, json, pretty-json] |
+| -prof |string| start profiler: [cpu, mem]                   |
 |  -p   | bool | show positions                               |
 |  -c   | bool | show comments                                |
 |  -r   | bool | resolve names                                |
diff --git a/main.go b/main.go
index ac260c7..05bceba 100644
--- a/main.go
+++ b/main.go
@@ -8,6 +8,7 @@ import (
 	"path/filepath"
 	"sync"
 
+	"github.com/pkg/profile"
 	"github.com/yookoala/realpath"
 	"github.com/z7zmey/php-parser/parser"
 	"github.com/z7zmey/php-parser/php5"
@@ -18,6 +19,7 @@ import (
 var wg sync.WaitGroup
 var usePhp5 *bool
 var dumpType string
+var profiler string
 var showPositions *bool
 var showComments *bool
 var showResolvedNs *bool
@@ -28,9 +30,17 @@ func main() {
 	showComments = flag.Bool("c", false, "show comments")
 	showResolvedNs = flag.Bool("r", false, "resolve names")
 	flag.StringVar(&dumpType, "d", "", "dump format: [custom, go, json, pretty_json]")
+	flag.StringVar(&profiler, "prof", "", "start profiler: [cpu, mem]")
 
 	flag.Parse()
 
+	switch profiler {
+	case "cpu":
+		defer profile.Start(profile.ProfilePath("."), profile.NoShutdownHook).Stop()
+	case "mem":
+		defer profile.Start(profile.MemProfile, profile.ProfilePath("."), profile.NoShutdownHook).Stop()
+	}
+
 	pathCh := make(chan string)
 	resultCh := make(chan parser.Parser)