[API] __Zone_disable_RequestAnimationFrame

[jinkwon]

We use webgl with zone.js.
requestAnimationFrame monkey patching makes perf issue from zone.js.
We need api such as __Zone_disable_RequestAnimationFrame = true;.

I found some flag on/off api from the modules page here.
Someone has any idea at all? ;)

Modules

https://github.com/angular/zone.js/blob/b3a76d3f8d374be8edf009f7a077e51eefec6a65/MODULE.md

[JiaLiPassion]

there are 2 solutions.

1. I can make a change to let __Zone_disable_RequestAnimationFrame = false disable requestAnimationFrame patching.

2. you can try to do this one, this will still have some overhead.

Zone.current.fork({
name: 'disableRequestAnimationFrame',
onScheduleTask: function(delegate, curr, target, task) {
if (task.source.contains('AnimationFrame') {
task.cancelScheduleRequest();
return Zone.root.scheduleTask(task);
}
return delegate.scheduleTask(target, task);
}
});

please try this one, if this still does not match your performance requirement, please let me know.

[jinkwon]

@JiaLiPassion Thanks for your feedback.

In my case, 1st solution is nice.
I solved issue with some my bad codes.
But if zone.js support api, it will be better though.

My code is here.

// rollback my honey monkey
if (window.__zone_symbol__requestAnimationFrame) {
  window.requestAnimationFrame = window.__zone_symbol__requestAnimationFrame;
  window.cancelAnimationFrame = window.__zone_symbol__cancelAnimationFrame;
  window.webkitRequestAnimationFrame = window.__zone_symbol__webkitRequestAnimationFrame;
}

[JiaLiPassion]

I have made a PR #876, you can use __Zone_disable_requestAnimationFrame = true to disable requestAnimationFrame patch.

[iamdenny]

also need to disable about webworker.
because mapbox.js use webworker a lot when use requestAnimation.
specially slow when use onmessage, so I change the code like this.

window.onmessage = window.__zone_symbol___onmessage;

Please make __Zone_disable_webworker or __Zone_disable_worker
Thanks.

[JiaLiPassion]

@iamdenny , in your case, you just want to disable patching window.onmessage?

[iamdenny]

webworker use postMessage and onmessage