Improve scale() performance

dist/datasource-zabbix/timeseries.js

@@ -154,6 +154,14 @@ System.register(['lodash', './utils'], function (_export, _context) {
     });
   }
 
+  function scale_perf(datapoints, factor) {
+    for (var i = 0; i < datapoints.length; i++) {
+      datapoints[i] = [datapoints[i][POINT_VALUE] * factor, datapoints[i][POINT_TIMESTAMP]];
+    }
+
+    return datapoints;
+  }
+
   /**
    * Simple delta. Calculate value delta between points.
    * @param {*} datapoints
@@ -322,6 +330,7 @@ System.register(['lodash', './utils'], function (_export, _context) {
         groupBy_perf: groupBy_perf,
         sumSeries: sumSeries,
         scale: scale,
+        scale_perf: scale_perf,
         delta: delta,
         rate: rate,
         SUM: SUM,