cache-per-frame

Cache the result of a function once per frame. Built for VRDisplay.getFrameData(frameData) when working with several third party modules that call this once per frame. Does not memoize via arguments, but only uses the arguments from the first call to the wrapped function per frame.

Install & Usage

Use the browser-ready bundle at dist/cache-per-frame.js:

<script src='cache-per-frame.js'></script>
<script>
var nativeGetFrameData = VRDisplay.prototype.getFrameData;
VRDisplay.prototype.getFrameData = cachePerFrame(function (fd) {
  return nativeGetFrameData.call(this, fd);
});
</script>

Or install via npm/yarn:

$ npm install cache-per-frame --save

const cachePerFrame = require('cache-per-frame');

var nativeGetFrameData = VRDisplay.prototype.getFrameData;
VRDisplay.prototype.getFrameData = cachePerFrame(function (fd) {
  return nativeGetFrameData.call(this, fd);
});

API

The root module is a function cachePerFrame(fn) that takes a function fn and returns a new wrapped form of that function that is throttled per frame. This wrapped function also has two additional methods for stopping and starting the throttling. By default, the wrapped function is already started.

wrappedFn.stop()

Stop throttling the function calls once per frame.

wrappedFn.start()

Start throttling the function calls once per frame.

License

Apache License Version 2.0 (see LICENSE)