diff --git a/Makefile b/Makefile
index af08537..91c4ff3 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@ all: clean build
 server: swagger dep
 	$(GOBUILD) -o server ./cmd/server
 
-runner: dep
+runner: swagger dep
 	$(GOBUILD) -o runner ./cmd/runner
 
 build: runner server
diff --git a/internal/api/problem/details.go b/internal/api/problem/details.go
index 3df21e6..fee3e40 100644
--- a/internal/api/problem/details.go
+++ b/internal/api/problem/details.go
@@ -39,6 +39,7 @@ func (h *handler) Details(c *gin.Context) {
 	pv, status := h.problemService.QueryLatestVersion(req.Pid)
 	if status != e.Success {
 		e.Pong(c, status, nil)
+		return
 	}
 	e.Pong(c, e.Success, gin.H{
 		"problem": p,
diff --git a/internal/api/status/queryByVersion.go b/internal/api/status/queryByVersion.go
index 3a738c0..8d61507 100644
--- a/internal/api/status/queryByVersion.go
+++ b/internal/api/status/queryByVersion.go
@@ -19,7 +19,7 @@ type queryByVersionRequest struct {
 // @Accept      application/x-www-form-urlencoded
 // @Produce     json
 // @Param       pvid formData uint true "problem version id"
-// @Param       offset formData int true "start position"
+// @Param       offset formData int false "start position"
 // @Param       limit formData int true "limit number of records"
 // @Response    200 {object} e.Response "[]*model.status"
 // @Router      /v1/status/query/problem_version [post]
diff --git a/internal/api/submission/query.go b/internal/api/submission/query.go
index e3e6126..53bf3fa 100644
--- a/internal/api/submission/query.go
+++ b/internal/api/submission/query.go
@@ -23,13 +23,12 @@ type queryResponse struct {
 // @Description Query submissions
 // @Accept      application/x-www-form-urlencoded
 // @Produce     json
-// @Param       pid formData uint true "problem id"
-// @Param       uid formData uint true "user id"
-// @Param       offset formData int true "start position"
+// @Param       pid formData uint false "problem id"
+// @Param       uid formData uint false "user id"
+// @Param       offset formData int false "start position"
 // @Param       limit formData int true "limit number of records"
 // @Response    200 {object} e.Response "queryResponse"
 // @Router      /v1/submission/query [post]
-
 func (h *handler) Query(c *gin.Context) {
 	req := new(queryRequest)
 
diff --git a/resource/bench/bench.py b/resource/bench/bench.py
new file mode 100644
index 0000000..08a3255
--- /dev/null
+++ b/resource/bench/bench.py
@@ -0,0 +1,70 @@
+import random
+import string
+
+from locust import HttpUser, task
+
+
+def randomstring(length):
+    return ''.join(random.choice(string.ascii_letters) for i in range(length))
+
+
+class WOJUser(HttpUser):
+
+    def on_start(self):
+        self.username = randomstring(16)
+        self.nickname = randomstring(16)
+        self.password = randomstring(16)
+
+        with self.client.post("/api/v1/user/create", data={
+            "username": self.username,
+            "nickname": self.nickname,
+            "password": self.password
+        }) as resp:
+            j = resp.json()
+            if j["code"] != 0:
+                resp.failure("create user failed")
+            else:
+                self.token = j["body"]
+
+    @task
+    def view_problem(self):
+        pid = []
+
+        with self.client.post("/api/v1/problem/search") as resp:
+            j = resp.json()
+            if j["code"] != 0:
+                resp.failure("search problem failed")
+            else:
+                for p in j["body"]:
+                    pid.append(p["meta"]["ID"])
+
+        for p in pid:
+            with self.client.post("/api/v1/problem/details", data={"pid": pid}) as resp:
+                if resp.json()["code"] != 0:
+                    resp.failure("view problem failed")
+
+    @task
+    def submit_code(self):
+        code = """
+            #include<iostream>
+            using namespace std;
+            int main() {
+                int a, b;
+                cin >> a >> b;
+                cout << a + b;
+                return 0;
+            }
+        """
+
+        with self.client.post("/api/v1/submission/create",
+                              headers={"Authorization": "Bearer " + self.token},
+                              data={"pid": 5, "language": "cpp", "code": code}
+                              ) as resp:
+            if resp.json()["code"] != 0:
+                resp.failure("submit code failed")
+
+    @task
+    def view_submission(self):
+        with self.client.post("/api/v1/submission/query", data={"pid": 5, "limit": 100}) as resp:
+            if resp.json()["code"] != 0:
+                resp.failure("view submission failed")
diff --git a/resource/frontend/.gitignore b/resource/frontend/.gitignore
new file mode 100644
index 0000000..e69de29
diff --git a/resource/runner/scripts/run_timeout.sh b/resource/runner/scripts/run_timeout.sh
index a55fe72..1f48957 100755
--- a/resource/runner/scripts/run_timeout.sh
+++ b/resource/runner/scripts/run_timeout.sh
@@ -5,7 +5,7 @@
 function docker_run() {
   local timeout=${TIMEOUT:-10}
   local log_file=${LOG_FILE:-"/dev/stderr"}
-  local log_limit=${LOG_LIMIT:-1K}
+  local log_limit=${LOG_LIMIT:-4K}
   log_info "$DOCKER run with timeout $timeout"
   CONTAINER_NAME=$(uuidgen)
   (
@@ -15,4 +15,5 @@ function docker_run() {
   $DOCKER run --rm --name "$CONTAINER_NAME" "$@" 2>&1 | head -c "$log_limit" >"$log_file"
   pkill -P $$
   $DOCKER kill "$CONTAINER_NAME" >/dev/null 2>&1
+  return 0
 }