Squashed 'thirdparty/preact/' content from commit b2d90cc

git-subtree-dir: thirdparty/preact
git-subtree-split: b2d90cc116f1d1998f7a7c98dc6986bf4c1841f4

1 files changed, 32 insertions, 0 deletions

diff --git a/src/vdom/component-recycler.js b/src/vdom/component-recycler.js
new file mode 100644
index 000000000..a70f0ece0
--- /dev/null
+++ b/src/vdom/component-recycler.js
@@ -0,0 +1,32 @@
+import { Component } from '../component';
+
+/** Retains a pool of Components for re-use, keyed on component name.
+ *	Note: since component names are not unique or even necessarily available, these are primarily a form of sharding.
+ *	@private
+ */
+const components = {};
+
+
+export function collectComponent(component) {
+	let name = component.constructor.name,
+		list = components[name];
+	if (list) list.push(component);
+	else components[name] = [component];
+}
+
+
+export function createComponent(Ctor, props, context) {
+	let inst = new Ctor(props, context),
+		list = components[Ctor.name];
+	Component.call(inst, props, context);
+	if (list) {
+		for (let i=list.length; i--; ) {
+			if (list[i].constructor===Ctor) {
+				inst.nextBase = list[i].nextBase;
+				list.splice(i, 1);
+				break;
+			}
+		}
+	}
+	return inst;
+}