examples/javascript/dynamicExample.js

   1 'use strict'
   2 const {
   3   DynamicThreadPool,
   4   PoolEvents,
   5   availableParallelism
   6 } = require('poolifier')
   7
   8 const pool = new DynamicThreadPool(
   9   Math.floor(availableParallelism() / 2),
  10   availableParallelism(),
  11   './yourWorker.js',
  12   {
  13     errorHandler: e => console.error(e),
  14     onlineHandler: () => console.info('worker is online')
  15   }
  16 )
  17 let poolFull = 0
  18 let poolReady = 0
  19 let poolBusy = 0
  20 pool.emitter?.on(PoolEvents.full, () => poolFull++)
  21 pool.emitter?.on(PoolEvents.ready, () => poolReady++)
  22 pool.emitter?.on(PoolEvents.busy, () => poolBusy++)
  23
  24 let resolved = 0
  25 const start = performance.now()
  26 const iterations = 1000
  27 for (let i = 1; i <= iterations; i++) {
  28   pool
  29     .execute()
  30     .then(() => {
  31       resolved++
  32       if (resolved === iterations) {
  33         console.info(
  34           `Time taken is ${(performance.now() - start).toFixed(2)}ms`
  35         )
  36         console.info(`The pool was full for ${poolFull} times`)
  37         console.info(`The pool was ready for ${poolReady} times`)
  38         console.info(`The pool was busy for ${poolBusy} times`)
  39         return pool.destroy()
  40       }
  41       return undefined
  42     })
  43     .catch(err => console.error(err))
  44 }