исправлено отображение на ie

bt/cpu-usage.js

@@ -0,0 +1,33 @@
+let startTime  = process.hrtime()
+let startUsage = process.cpuUsage()
+
+let keepTime = process.hrtime()
+let keepUsage = process.cpuUsage()
+let sw = false
+
+setInterval(() => {
+	if(!sw) {
+		keepTime = process.hrtime();
+    	keepUsage = process.cpuUsage();
+    	sw = true;
+	} else {
+		startTime = keepTime;
+		startUsage = keepUsage;
+		sw = false;
+	} 
+}, 500)
+
+module.exports = () => {
+    function secNSec2ms (secNSec) {
+      return secNSec[0] * 1000 + secNSec[1] / 1000000
+    }
+
+    var elapTime = process.hrtime(startTime)
+    var elapUsage = process.cpuUsage(startUsage)
+
+    var elapTimeMS = secNSec2ms(elapTime)
+    var elapUserMS = elapUsage.user
+    var elapSystMS = elapUsage.system
+
+    return Math.round(100 * ((elapUserMS + elapSystMS) / 1000) / elapTimeMS)
+}