Merge branch 'ma-tty-groupBy_perf_outside_range'

dist/datasource-zabbix/timeseries.js

@@ -83,6 +83,10 @@ System.register(['lodash', './utils'], function (_export, _context) {
   }
 
   function groupBy_perf(datapoints, interval, groupByCallback) {
+    if (datapoints.length === 0) {
+      return [];
+    }
+
     var ms_interval = utils.parseInterval(interval);
     var grouped_series = [];
     var frame_values = [];

dist/test/datasource-zabbix/timeseries.js

@@ -108,6 +108,10 @@ function groupBy(datapoints, interval, groupByCallback) {
 }
 
 function groupBy_perf(datapoints, interval, groupByCallback) {
+  if (datapoints.length === 0) {
+    return [];
+  }
+
   var ms_interval = utils.parseInterval(interval);
   var grouped_series = [];
   var frame_values = [];

src/datasource-zabbix/timeseries.js

@@ -95,6 +95,10 @@ function groupBy(datapoints, interval, groupByCallback) {
 }
 
 function groupBy_perf(datapoints, interval, groupByCallback) {
+  if (datapoints.length === 0) {
+    return [];
+  }
+
   let ms_interval = utils.parseInterval(interval);
   let grouped_series = [];
   let frame_values = [];