Zero-Allocation Event Loops in High-Throughput Node.js Telemetry Daemons

In high-throughput background daemons (such as our lead telemetry ingestor and metrics scrapers), creating temporary objects inside high-frequency loops triggers frequent V8 Garbage Collection (GC) pauses that spike latency. Implementing **Object Pooling and Buffer Pre-Allocation** maintains constant memory usage and zero GC stutter.

1. Object Pool Pattern for Telemetry Records

// Zero-Allocation Telemetry Record Pool
class TelemetryRecordPool {
  constructor(size = 1000) {
    this.pool = Array.from({ length: size }, () => ({
      timestamp: 0,
      domain: '',
      status: 0,
      duration: 0
    }));
    this.index = 0;
  }

  acquire(timestamp, domain, status, duration) {
    const record = this.pool[this.index++ % this.pool.length];
    record.timestamp = timestamp;
    record.domain = domain;
    record.status = status;
    record.duration = duration;
    return record;
  }
}