timer.ts

class Timer {
  private times;
  private count;
  private startTime: number;

  public constructor() {
    this.times = {};
    this.count = {};
  }

  public start(): void {
    this.startTime = new Date().getTime();
  }

  public stop(name: string): void {
    let end = new Date().getTime();
    let time = end - this.startTime;
    if (this.times[name]) {
      this.times[name] = this.times[name] + time;
      this.count[name] = this.count[name] + 1;
    } else {
      this.times[name] = time;
      this.count[name] = 1;
    }
  }

  public output(filename: string) {
    for (let name in this.times) {
      if (this.times[name] > 100) {
        console.log(name + "\t" + this.times[name] + "ms\t" + this.count[name] + "\t" + filename);
      }
    }
  }
}