Profiler class

profiler.js

import fs from 'fs';
import v8profiler from 'v8-profiler-next';

export class Profiler {
  constructor(options) {
    const { title, active, outputDir } = options;
      this.title = title;
      this.active = active;
      this.outputDir = outputDir;
    }

  start() {
    if (this.active) {
      v8profiler.startProfiling(this.title, true);
    }
  }

  finish() {
    if (this.active) {
      const profile = v8profiler.stopProfiling(this.title);
      profile.export((error, result) => {
        if (error) {
          console.log('error', error);
        } else {
          fs.writeFileSync(
            `${process.cwd()}/${this.outputDir}/${this.title}.cpuprofile`,
            result
          );
        }
      });
    }
  }
}

export default Profiler;