Reduce Lookup for Missing Lifecycle Methods

This is a micro-optimization that reduces the lookup time for missing lifecycle methods. The extra amount of memory is linear to the number of components that exist on a page which I think is a worthwile trade-off.

Tim Yung committed Jul 10, 2013 at 14:45 UTC 8687645c50b0211f60ded688d95fedd9735a37ee

1 file changed +6

src/core/ReactCompositeComponent.js

@@ -875,6 +875,12 @@ var ReactCompositeComponent = {

875 Constructor.prototype.render,

876 'createClass(...): Class specification must implement a `render` method.'

877 );

878 + // Reduce time spent doing lookups by setting these on the prototype.

879 + for (var methodName in ReactCompositeComponentInterface) {

880 + if (!Constructor.prototype[methodName]) {

881 + Constructor.prototype[methodName] = null;

882 + }

883 + }

884

885 var ConvenienceConstructor = function(props, children) {

886 var instance = new Constructor();