public enable()

in AutoCollection/Performance.ts [50:88]
37 lines of code
8 McCabe index (conditional complexity)

    public enable(isEnabled: boolean, collectionInterval?: number) {
        this._isEnabled = isEnabled;
        if (this._isEnabled && !this._isInitialized) {
            this._isInitialized = true;
        }

        if (isEnabled) {
            if (!this._handle) {
                this._lastCpus = os.cpus();
                this._lastRequests = {
                    totalRequestCount: AutoCollectPerformance._totalRequestCount,
                    totalFailedRequestCount: AutoCollectPerformance._totalFailedRequestCount,
                    time: +new Date
                };
                this._lastDependencies = {
                    totalDependencyCount: AutoCollectPerformance._totalDependencyCount,
                    totalFailedDependencyCount: AutoCollectPerformance._totalFailedDependencyCount,
                    time: +new Date
                };
                this._lastExceptions = {
                    totalExceptionCount: AutoCollectPerformance._totalExceptionCount,
                    time: +new Date
                };

                if (typeof (process as any).cpuUsage === 'function') {
                    this._lastAppCpuUsage = (process as any).cpuUsage();
                }
                this._lastHrtime = process.hrtime();
                this._collectionInterval = collectionInterval || this._collectionInterval;
                this._handle = setInterval(() => this.trackPerformance(), this._collectionInterval);
                this._handle.unref(); // Allow the app to terminate even while this loop is going on
            }
        } else {
            if (this._handle) {
                clearInterval(this._handle);
                this._handle = undefined;
            }
        }
    }