Improve scale() performance

dist/test/datasource-zabbix/benchmarks/timeseries_bench.js

@@ -49,6 +49,16 @@ module.exports = [{
       _timeseries2.default.rate(growing_series);
     }
   }
+}, {
+  name: 'scale',
+  tests: {
+    'scale()': function scale() {
+      _timeseries2.default.scale(datapoints, 42);
+    },
+    'scale_perf()': function scale_perf() {
+      _timeseries2.default.scale_perf(datapoints, 42);
+    }
+  }
 }, {
   name: 'groupBy vs groupBy_perf',
   tests: {

dist/test/datasource-zabbix/dataProcessor.js

@@ -29,7 +29,7 @@ var sumSeries = _timeseries2.default.sumSeries;
 var delta = _timeseries2.default.delta;
 var rate = _timeseries2.default.rate;
 var scale = function scale(factor, datapoints) {
-  return _timeseries2.default.scale(datapoints, factor);
+  return _timeseries2.default.scale_perf(datapoints, factor);
 };
 
 var SUM = _timeseries2.default.SUM;

dist/test/datasource-zabbix/timeseries.js

@@ -179,6 +179,14 @@ function scale(datapoints, factor) {
   });
 }
 
+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
@@ -338,6 +346,7 @@ var exportedFunctions = {
   groupBy_perf: groupBy_perf,
   sumSeries: sumSeries,
   scale: scale,
+  scale_perf: scale_perf,
   delta: delta,
   rate: rate,
   SUM: SUM,