feat: multiprocessing and some diagnostics

test/stress/child.js

@@ -2,6 +2,11 @@ const https = require('https')
 const path = require('path')
 const fs = require('fs')
 const uuid = require('uuid')
+const _ = require('lodash/fp')
+const { PerformanceObserver, performance } = require('perf_hooks')
+
+const utils = require('./utils')
+const variables = require('./utils/variables')
 
 function getCert (machineIndex) {
   try {
@@ -23,8 +28,11 @@ function connectionInfo (machineIndex) {
 }
 
 let counter = 0
+const requestTimes = []
+let latestResponseTime = 0
 
 function request (machineIndex, pid) {
+  performance.mark('A')
   https.get({
     hostname: 'localhost',
     port: 3000,
@@ -39,6 +47,9 @@ function request (machineIndex, pid) {
     }
   }, res => {
     res.on('data', (d) => {
+      performance.mark('B')
+      performance.measure('A to B', 'A', 'B')
+      console.log(`Machine ${machineIndex} || Avg request response time: ${_.mean(requestTimes).toFixed(3)} || Latest response time: ${latestResponseTime.toFixed(3)}`)
       process.send({ message: Buffer.from(d).toString() })
     })
   })
@@ -46,9 +57,17 @@ function request (machineIndex, pid) {
   counter++
 }
 
-process.on('message', (msg) => {
+const obs = new PerformanceObserver((items) => {
+  latestResponseTime = items.getEntries()[0].duration
+  requestTimes.push(latestResponseTime)
+  performance.clearMarks()
+})
+obs.observe({ entryTypes: ['measure'] })
+
+process.on('message', async (msg) => {
   console.log('Message from parent:', msg)
 
+  if (msg.hasVariance) await new Promise(resolve => setTimeout(resolve, utils.randomIntFromInterval(1, variables.POLLING_INTERVAL)))
   const pid = uuid.v4()
   request(msg.machineIndex, pid)