diff --git a/.gitignore b/.gitignore
index 4592fa6..9e6bbd0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ php-parser
 
 cpu.pprof
 mem.pprof
+trace.out
\ No newline at end of file
diff --git a/README.md b/README.md
index c347b95..dbcfff4 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ php-parser [flags] <path> ...
 |  -d   |string| dump format: [custom, go, json, pretty-json] |
 |  -p   | bool | show positions                               |
 |  -r   | bool | resolve names                                |
-| -prof |string| start profiler: [cpu, mem]                   |
+| -prof |string| start profiler: [cpu, mem, trace]            |
 | -meta | bool | show meta info                               |
 | -php5 | bool | parse as PHP5                                |
 
diff --git a/main.go b/main.go
index 2c46f11..25b8977 100644
--- a/main.go
+++ b/main.go
@@ -29,7 +29,7 @@ func main() {
 	withMeta = flag.Bool("meta", false, "show meta")
 	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.StringVar(&profiler, "prof", "", "start profiler: [cpu, mem, trace]")
 
 	flag.Parse()
 
@@ -38,6 +38,8 @@ func main() {
 		defer profile.Start(profile.ProfilePath("."), profile.NoShutdownHook).Stop()
 	case "mem":
 		defer profile.Start(profile.MemProfile, profile.ProfilePath("."), profile.NoShutdownHook).Stop()
+	case "trace":
+		defer profile.Start(profile.TraceProfile, profile.ProfilePath("."), profile.NoShutdownHook).Stop()
 	}
 
 	pathCh := make(chan string)