Restore actually useful test code change

Author: szegedi

integration-tests/profiler/codehotspots.js

@@ -11,13 +11,19 @@ const busyCycleTime = BigInt(process.env.BUSY_CYCLE_TIME)
 
 function busyLoop () {
   const start = process.hrtime.bigint()
+  let x = 0
   for (;;) {
     const now = process.hrtime.bigint()
     // Busy cycle
     if (now - start > busyCycleTime) {
       break
     }
+    // Do something in addition to invoking hrtime
+    for (let i = 0; i < 1000; i++) {
+      x += Math.sqrt(Math.random() * 2 - 1)
+    }
   }
+  return x
 }
 
 let counter = 0