Simple Javascript Performance Profiler Log

gistfile1.txt

let perf = {
  t0: 0,
  t1: 0,
  tick: 0,
  last: 0,
  start() {
    this.tick = 1;
    console.trace();
    this.t0 = performance.now();

  },
  end(descriptor = "") {
    let val = 0;
    if (this.tick === 1) {
      this.t1 = performance.now();
      val = (this.t1 - this.t0);
      console.table({
        "Function": descriptor.toString(),
        "Elapsed": val.toString(),
        "Last": this.last.toString()
      });
      console.trace();
      this.last = val;
    } else {
      console.log(`No perf start for ${descriptor}`);
    }
    this.tick = 0;

  }
};
console.clear();
for (let x = 0; x < 2; x++) {
  perf.start();
  for (let i = 0; i < 10000; i++) {
    let j = i * 10;
  }
  perf.end("the func");
}