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@clinyong
Last active July 5, 2018 03:48
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Minimum react event pool
const eventPool = [];
const EVENT_POOL_SIZE = 10;
function SyntheticEvent(nativeEvent) {
this.nativeEvent = nativeEvent;
}
SyntheticEvent.prototype.persist = function persist() {
this.isPersistent = true;
};
SyntheticEvent.prototype.destructor = function destructor() {
this.nativeEvent = null;
};
export function getPooledEvent(nativeEvent) {
if (eventPool.length) {
const instance = eventPool.pop();
// We should not use class here, or will throw Class constructor cannot be invoked without 'new'
return SyntheticEvent.call(instance, nativeEvent);
} else {
return new SyntheticEvent(nativeEvent);
}
}
export function releasePooledEvent(evt) {
evt.destructor();
if (eventPool.length < EVENT_POOL_SIZE) {
eventPool.push(evt);
}
}
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