cmpstr/dist/esm/utils/Profiler.mjs

CmpStr is a lightweight, fast and well performing package for calculating string similarity

// CmpStr v3.2.2 build-bb61120-260311 by Paul Köhler @komed3 / MIT License
class Profiler {
  active;
  static ENV;
  static instance;
  nowFn;
  memFn;
  store = new Set();
  totalTime = 0;
  totalMem = 0;
  static detectEnv() {
    if (typeof process !== 'undefined') Profiler.ENV = 'nodejs';
    else if (typeof performance !== 'undefined') Profiler.ENV = 'browser';
    else Profiler.ENV = 'unknown';
  }
  static getInstance(enable) {
    if (!Profiler.ENV) Profiler.detectEnv();
    return (Profiler.instance ||= new Profiler(enable));
  }
  constructor(active = false) {
    this.active = active;
    switch (Profiler.ENV) {
      case 'nodejs':
        this.nowFn = () => Number(process.hrtime.bigint()) / 1e6;
        this.memFn = () => process.memoryUsage().heapUsed;
        break;
      case 'browser':
        this.nowFn = () => performance.now();
        this.memFn = () => performance.memory?.usedJSHeapSize ?? 0;
        break;
      default:
        this.nowFn = () => Date.now();
        this.memFn = () => 0;
        break;
    }
  }
  now = () => this.nowFn();
  mem = () => this.memFn();
  profile(fn, meta) {
    const startTime = this.now(),
      startMem = this.mem();
    const res = fn();
    const deltaTime = this.now() - startTime,
      deltaMem = this.mem() - startMem;
    this.store.add({ time: deltaTime, mem: deltaMem, res, meta });
    ((this.totalTime += deltaTime), (this.totalMem += deltaMem));
    return res;
  }
  enable = () => {
    this.active = true;
  };
  disable = () => {
    this.active = false;
  };
  clear() {
    this.store.clear();
    this.totalTime = 0;
    this.totalMem = 0;
  }
  run(fn, meta = {}) {
    return this.active ? this.profile(fn, meta) : fn();
  }
  async runAsync(fn, meta = {}) {
    return this.active
      ? this.profile(async () => await fn(), meta)
      : await fn();
  }
  getAll = () => [...this.store];
  getLast = () => this.getAll().pop();
  getTotal = () => ({ time: this.totalTime, mem: this.totalMem });
  services = Object.freeze({
    enable: this.enable.bind(this),
    disable: this.disable.bind(this),
    clear: this.clear.bind(this),
    report: this.getAll.bind(this),
    last: this.getLast.bind(this),
    total: this.getTotal.bind(this)
  });
}

export { Profiler };