+// Partial Copyright Jerome Benoit. 2021. All Rights Reserved.
+
import { CircularArray, DEFAULT_CIRCULAR_ARRAY_SIZE } from './CircularArray';
import { IncomingRequestCommand, RequestCommand } from '../types/ocpp/Requests';
import { PerformanceEntry, PerformanceObserver, performance } from 'perf_hooks';
public static endMeasure(name: string, beginId: string): void {
performance.measure(name, beginId);
+ performance.clearMarks(beginId);
}
public addRequestStatistic(command: RequestCommand | IncomingRequestCommand, messageType: MessageType): void {
clearInterval(this.displayInterval);
}
performance.clearMarks();
- this.performanceObserver.disconnect();
+ this.performanceObserver?.disconnect();
+ }
+
+ public restart(): void {
+ this.stop();
+ this.start();
}
private initializePerformanceObserver(): void {
this.performanceObserver = new PerformanceObserver((list) => {
- this.logPerformanceEntry(list.getEntries()[0]);
+ this.addPerformanceEntryToStatistics(list.getEntries()[0]);
+ logger.debug(`${this.logPrefix()} '${list.getEntries()[0].name}' performance entry: %j`, list.getEntries()[0]);
});
this.performanceObserver.observe({ entryTypes: ['measure'] });
}
- private logPerformanceEntry(entry: PerformanceEntry): void {
- this.addPerformanceStatistic(entry.name, entry.duration);
- logger.debug(`${this.logPrefix()} '${entry.name}' performance entry: %j`, entry);
- }
-
private logStatistics(): void {
logger.info(this.logPrefix() + ' %j', this.statistics);
}
if (Array.isArray(dataSet) && dataSet.length === 1) {
return dataSet[0];
}
- const sortedDataSet = dataSet.slice().sort();
+ const sortedDataSet = dataSet.slice().sort((a, b) => (a - b));
const middleIndex = Math.floor(sortedDataSet.length / 2);
if (sortedDataSet.length % 2) {
return sortedDataSet[middleIndex / 2];
return (sortedDataSet[(middleIndex - 1)] + sortedDataSet[middleIndex]) / 2;
}
+ // TODO: use order statistics tree https://en.wikipedia.org/wiki/Order_statistic_tree
+ private percentile(dataSet: number[], percentile: number): number {
+ if (percentile < 0 && percentile > 100) {
+ throw new RangeError('Percentile is not between 0 and 100');
+ }
+ if (Utils.isEmptyArray(dataSet)) {
+ return 0;
+ }
+ const sortedDataSet = dataSet.slice().sort((a, b) => (a - b));
+ if (percentile === 0) {
+ return sortedDataSet[0];
+ }
+ if (percentile === 100) {
+ return sortedDataSet[sortedDataSet.length - 1];
+ }
+ const percentileIndex = ((percentile / 100) * sortedDataSet.length) - 1;
+ if (Number.isInteger(percentileIndex)) {
+ return (sortedDataSet[percentileIndex] + sortedDataSet[percentileIndex + 1]) / 2;
+ }
+ return sortedDataSet[Math.round(percentileIndex)];
+ }
+
private stdDeviation(dataSet: number[]): number {
let totalDataSet = 0;
for (const data of dataSet) {
return Math.sqrt(totalGeometricDeviation / dataSet.length);
}
- private addPerformanceStatistic(name: string, duration: number): void {
+ private addPerformanceEntryToStatistics(entry: PerformanceEntry): void {
+ let entryName = entry.name;
// Rename entry name
- const MAP_NAME = {};
- if (MAP_NAME[name]) {
- name = MAP_NAME[name] as string;
+ const MAP_NAME: Record<string, string> = {};
+ if (MAP_NAME[entryName]) {
+ entryName = MAP_NAME[entryName];
}
// Initialize command statistics
- if (!this.statistics.statisticsData[name]) {
- this.statistics.statisticsData[name] = {} as StatisticsData;
+ if (!this.statistics.statisticsData[entryName]) {
+ this.statistics.statisticsData[entryName] = {} as StatisticsData;
}
- // Update current statistics timers
- this.statistics.statisticsData[name].countTimeMeasurement = this.statistics.statisticsData[name].countTimeMeasurement ? this.statistics.statisticsData[name].countTimeMeasurement + 1 : 1;
- this.statistics.statisticsData[name].currentTimeMeasurement = duration;
- this.statistics.statisticsData[name].minTimeMeasurement = this.statistics.statisticsData[name].minTimeMeasurement ? (this.statistics.statisticsData[name].minTimeMeasurement > duration ? duration : this.statistics.statisticsData[name].minTimeMeasurement) : duration;
- this.statistics.statisticsData[name].maxTimeMeasurement = this.statistics.statisticsData[name].maxTimeMeasurement ? (this.statistics.statisticsData[name].maxTimeMeasurement < duration ? duration : this.statistics.statisticsData[name].maxTimeMeasurement) : duration;
- this.statistics.statisticsData[name].totalTimeMeasurement = this.statistics.statisticsData[name].totalTimeMeasurement ? this.statistics.statisticsData[name].totalTimeMeasurement + duration : duration;
- this.statistics.statisticsData[name].avgTimeMeasurement = this.statistics.statisticsData[name].totalTimeMeasurement / this.statistics.statisticsData[name].countTimeMeasurement;
- Array.isArray(this.statistics.statisticsData[name].timeMeasurementSeries) ? this.statistics.statisticsData[name].timeMeasurementSeries.push(duration) : this.statistics.statisticsData[name].timeMeasurementSeries = new CircularArray<number>(DEFAULT_CIRCULAR_ARRAY_SIZE, duration);
- this.statistics.statisticsData[name].medTimeMeasurement = this.median(this.statistics.statisticsData[name].timeMeasurementSeries);
- this.statistics.statisticsData[name].stdDevTimeMeasurement = this.stdDeviation(this.statistics.statisticsData[name].timeMeasurementSeries);
+ // Update current statistics
+ this.statistics.statisticsData[entryName].countTimeMeasurement = this.statistics.statisticsData[entryName].countTimeMeasurement ? this.statistics.statisticsData[entryName].countTimeMeasurement + 1 : 1;
+ this.statistics.statisticsData[entryName].currentTimeMeasurement = entry.duration;
+ this.statistics.statisticsData[entryName].minTimeMeasurement = this.statistics.statisticsData[entryName].minTimeMeasurement ? (this.statistics.statisticsData[entryName].minTimeMeasurement > entry.duration ? entry.duration : this.statistics.statisticsData[entryName].minTimeMeasurement) : entry.duration;
+ this.statistics.statisticsData[entryName].maxTimeMeasurement = this.statistics.statisticsData[entryName].maxTimeMeasurement ? (this.statistics.statisticsData[entryName].maxTimeMeasurement < entry.duration ? entry.duration : this.statistics.statisticsData[entryName].maxTimeMeasurement) : entry.duration;
+ this.statistics.statisticsData[entryName].totalTimeMeasurement = this.statistics.statisticsData[entryName].totalTimeMeasurement ? this.statistics.statisticsData[entryName].totalTimeMeasurement + entry.duration : entry.duration;
+ this.statistics.statisticsData[entryName].avgTimeMeasurement = this.statistics.statisticsData[entryName].totalTimeMeasurement / this.statistics.statisticsData[entryName].countTimeMeasurement;
+ Array.isArray(this.statistics.statisticsData[entryName].timeMeasurementSeries) ? this.statistics.statisticsData[entryName].timeMeasurementSeries.push(entry.duration) : this.statistics.statisticsData[entryName].timeMeasurementSeries = new CircularArray<number>(DEFAULT_CIRCULAR_ARRAY_SIZE, entry.duration);
+ this.statistics.statisticsData[entryName].medTimeMeasurement = this.median(this.statistics.statisticsData[entryName].timeMeasurementSeries);
+ this.statistics.statisticsData[entryName].ninetyFiveThPercentileTimeMeasurement = this.percentile(this.statistics.statisticsData[entryName].timeMeasurementSeries, 95);
+ this.statistics.statisticsData[entryName].stdDevTimeMeasurement = this.stdDeviation(this.statistics.statisticsData[entryName].timeMeasurementSeries);
}
private logPrefix(): string {