Class MemoryMonitor

src/utils.ts:551–606

 * Memory monitor for tracking usage during operations
 */
export class MemoryMonitor {
  private checkInterval: ReturnType<typeof setInterval> | null = null;
  private peakUsage = 0;
  private threshold: number;
  private onThresholdExceeded?: (usage: number) => void;

  constructor(
    thresholdMB: number = 500,
    onThresholdExceeded?: (usage: number) => void
  ) {
    this.threshold = thresholdMB * 1024 * 1024;
    this.onThresholdExceeded = onThresholdExceeded;
  }

  /**
   * Start monitoring memory usage
   */
  start(intervalMs: number = 1000): void {
    this.stop();
    this.peakUsage = 0;

    this.checkInterval = setInterval(() => {
      const usage = process.memoryUsage().heapUsed;
      if (usage > this.peakUsage) {
        this.peakUsage = usage;
      }
      if (usage > this.threshold && this.onThresholdExceeded) {
        this.onThresholdExceeded(usage);
      }
    }, intervalMs);
  }

  /**
   * Stop monitoring
   */
  stop(): void {
    if (this.checkInterval) {
      clearInterval(this.checkInterval);
      this.checkInterval = null;
    }
  }

  /**
   * Get peak memory usage in bytes
   */
  getPeakUsage(): number {
    return this.peakUsage;
  }

  /**
   * Get current memory usage in bytes
   */
  getCurrentUsage(): number {
    return process.memoryUsage().heapUsed;
  }
}