fix

@@ -29,8 +29,6 @@ module.exports = (limiter, policy) => {
 
     const key = `pc:limiter:${limiter.remoteIp}`;
 
-    let isNew = true;
-
     res.on('render', function() {
         let route = req.route ? req.route.path : '';
         let appPath = req.app.mountpath;
@@ -46,15 +44,14 @@ module.exports = (limiter, policy) => {
             pageIncr = 5;
         }
 
-        if (pageIncr > 0 && !isNew) {
-            cache.incrAsync(key, pageIncr);
+        if (pageIncr > 0) {
+            cache.incr(key, pageIncr, (err) => {});
         }
     });
 
     return cache.getAsync(key).then((result) => {
         logger.debug('qps limiter: ' + key + '@' + result + ' max: ' + MAX_QPS);
         if (result && _.isNumber(result)) {
-            isNew = false;
             if (result === -1) {
                 return Promise.resolve(true);
             }