microbenchmark performance 100x slower

[petkaantonov]

Quite a mystery but bluebird performs 100x worse in various microbenchmarks by @stefanpenner after introducing custom builds in 0.9.3

Before that commit:

bluebird def x 1,564,555 ops/sec ±1.67% (68 runs sampled)

After:

bluebird def x 20,000 ops/sec ±1.67% (68 runs sampled)

While this is a low quality benchmark such radical change still worries me:

//Async test
function make() {
  var resolver = Promise.pending()

    resolver.fulfill()

  return resolver.promise
}


make().then(function () { deferred.resolve() })

Only the node.js macrobenchmark are currently used to test for performance regressions so that's how these were missed.

[petkaantonov]

Fixed in 2c51568