Improve scale() performance

dist/datasource-zabbix/benchmarks/timeseries_bench.js

@@ -45,6 +45,17 @@ module.exports = [
       }
     }
   },
+  {
+    name: 'scale',
+    tests: {
+      'scale()': () => {
+        ts.scale(datapoints, 42);
+      },
+      'scale_perf()': () => {
+        ts.scale_perf(datapoints, 42);
+      }
+    }
+  },
   {
     name: 'groupBy vs groupBy_perf',
     tests: {

dist/datasource-zabbix/dataProcessor.js

@@ -103,7 +103,7 @@ System.register(['lodash', './utils', './timeseries'], function (_export, _conte
       rate = ts.rate;
 
       scale = function scale(factor, datapoints) {
-        return ts.scale(datapoints, factor);
+        return ts.scale_perf(datapoints, factor);
       };
 
       SUM = ts.SUM;

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,