nodehog.js

class NodeHog {
  constructor(lifespan, deathspan, iterations) {
    this.lifespan = lifespan || 300000;
    this.deathspan = deathspan || 600000;
    this.iterations = iterations || 10;
    this.pid = Math.random().toString(36).substr(2, 5);
  }
  
  async start() {
    console.log('\n===========================================\n> Starting new NodeHog [ ' + this.pid + ' ].\n');

    for (let i = 0; i < this.iterations; i++) {
      this.stress();
      await this.destress();

      if (i === this.iterations - 1) {
        console.log('\n> Killing NodeHog [ ' + this.pid + ' ].\n-------------------------------------------\n');
      }
    }
  }

  stress() {
    const periodType = this.lifespan > 60000 ? 'minute' : 'second';
    const period = periodType === 'minute' ? 60000 : 1000;
    let start = Date.now(),
      now = start,
      loggerInc = start,
      periodCount = 0,
      acc = 0;

    console.log('\n[ ' + this.pid + ' ] --> Stressing...\n');

    const logger = (force) => {
      const timeDiff = now - loggerInc;

      if (timeDiff > period || force) {
        periodCount++;
        const plural = periodCount > 1 ? 's' : '';

        console.log('[ ' + this.pid + ' ] ----> ' + 
          periodCount + 
          ' ' + 
          periodType + 
          plural + 
          ' of stress period complete.');

        loggerInc = Date.now();
      }
    }
    
    while (now - start < this.lifespan) {
      acc += Math.random() * Math.random();
      logger();
      now = Date.now();
    }

    logger(true);
  }

  destress() {
    console.log('\n[ ' + this.pid + ' ] --> Destressing...\n');

    return new Promise(resolve => {
      setTimeout(resolve, this.deathspan);
    });
  }
}

module.exports = {NodeHog};