Promises/A+ Comparisons (v52)

Revision 52 of this benchmark created on

Description

A comparison of Promises/A+ implementations in active development.

Uses Q and Native Promises (if available) as a baseline to test allegedly "performant" promise implementations.

Preparation HTML

<script>
if (typeof Promise !== 'undefined') {
  var NativePromise = Promise;
}
</script>
<script src="https://rawgit.com/kriskowal/q/v1/q.js"></script>
<script src="https://rawgit.com/calvinmetcalf/lie/master/dist/lie.noConflict.js"></script>
<script src="http://rsvpjs-builds.s3.amazonaws.com/rsvp-latest.js"></script>
<script>
var RSVPPromise = RSVP.Promise;
var LiePromise = Lie;
</script>
<script src="http://rawgit.com/petkaantonov/bluebird/master/js/browser/bluebird.js"></script>
<script>
var BluebirdPromise = Promise;
</script>
<script src="https://rawgit.com/cujojs/when/3.2.1/es6-shim/Promise.js"></script>
<script>
var WhenPromise = Promise;
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
Bluebird deferred
// async test
function make() {
  var resolver = BluebirdPromise.defer();

  resolver.resolve();

  return resolver.promise;
}

make().then(function() {
  deferred.resolve();
});
ready
RSVP deferred
// async test
function make() {
  var defer = RSVP.defer();

  defer.resolve();

  return defer.promise;
}

make().then(function() {
  deferred.resolve();
});
ready
Bluebird classic
// async test
function make() {
  return new BluebirdPromise(function(resolve, reject) {
    resolve();
  });
}

make().then(function() {
  deferred.resolve();
});
ready
RSVP classic
// async test
function make() {
  return new RSVPPromise(function(resolve, reject) {
    resolve();
  });
}

make().then(function() {
  deferred.resolve();
});
ready
Q deferred
// async test
function make() {
  var resolver = Q.defer()

  resolver.resolve();

  return resolver.promise;
}

make().then(function() {
  deferred.resolve();
});
ready
Q classic
// async test
function make() {
  return Q(function(resolve, reject) {
    resolve();
  });
}

make().then(function() {
  deferred.resolve();
});
ready
when es6 shim
// async test
function make() {
  return new WhenPromise(function(resolve, reject) {
    resolve();
  });
}

make().then(function() {
  deferred.resolve();
});
ready
Lie
// async test
function make() {
  return new LiePromise(function(resolve, reject) {
    resolve();
  });
}

make().then(function() {
  deferred.resolve();
});
ready
Native Promise
// async test
function make() {
  return new NativePromise(function(resolve, reject) {
    resolve();
  });
}

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

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.