Provide benchmark.js interface to just run functions meant to be benchmarked, i.e. to collect deoptimization info

deoptmark.js

'use strict'

const deferred = {
  resolve: function dontCare() {}
}

class DeoptMark {
  constructor({ ITER = 1E3 } = {}) {
    this._ITER = ITER
    this._fns = []
  }

  add(name, fn, opts = {}) {
    this._fns.push({ name, fn, opts })
  }

  run() {
    for (const { name, fn, opts } of this._fns) {
      console.log(`Running ${name}`)
      const ctx = {}
      if (typeof opts.onStart === 'function') {
        opts.onStart.call(ctx)
      }
      for (var i = 0; i < this._ITER; i++) {
        fn.call(ctx, deferred)
      }
    }
  }
}

const init = require(process.argv[2])

const suite = new DeoptMark()
suite.cacheSizes = [16 ** 2, 16 ** 3, 16 ** 4]

init(suite)
suite.run()