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node_modules/lottie-web/player/js/utils/pooling/shapeCollection_pool.js

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+import {
+  createSizedArray,
+} from '../helpers/arrays';
+import shapePool from './shape_pool';
+import pooling from './pooling';
+import ShapeCollection from '../shapes/ShapeCollection';
+
+const shapeCollectionPool = (function () {
+  var ob = {
+    newShapeCollection: newShapeCollection,
+    release: release,
+  };
+
+  var _length = 0;
+  var _maxLength = 4;
+  var pool = createSizedArray(_maxLength);
+
+  function newShapeCollection() {
+    var shapeCollection;
+    if (_length) {
+      _length -= 1;
+      shapeCollection = pool[_length];
+    } else {
+      shapeCollection = new ShapeCollection();
+    }
+    return shapeCollection;
+  }
+
+  function release(shapeCollection) {
+    var i;
+    var len = shapeCollection._length;
+    for (i = 0; i < len; i += 1) {
+      shapePool.release(shapeCollection.shapes[i]);
+    }
+    shapeCollection._length = 0;
+
+    if (_length === _maxLength) {
+      pool = pooling.double(pool);
+      _maxLength *= 2;
+    }
+    pool[_length] = shapeCollection;
+    _length += 1;
+  }
+
+  return ob;
+}());
+
+export default shapeCollectionPool;