Optimized cloneFragment for size and speed

fixtures/browser/package.json

@@ -13,12 +13,12 @@
   "author": "",
   "license": "MIT",
   "devDependencies": {
-    "@babel/core": "7.10.1",
+    "@babel/core": "7.10.2",
     "@babel/helper-replace-supers": "7.10.1",
     "@babel/plugin-proposal-class-properties": "7.10.1",
     "@babel/plugin-proposal-decorators": "7.10.1",
     "@babel/plugin-proposal-object-rest-spread": "7.10.1",
-    "@babel/preset-env": "7.10.1",
+    "@babel/preset-env": "7.10.2",
     "babel-loader": "^8.1.0",
     "jasmine-core": "^3.5.0",
     "karma": "^5.0.9",

package.json

@@ -79,14 +79,14 @@
     "test:package": "node fixtures/packaging/build-all.js"
   },
   "devDependencies": {
-    "@babel/core": "^7.10.1",
+    "@babel/core": "^7.10.2",
     "@babel/plugin-proposal-class-properties": "7.10.1",
-    "@babel/preset-env": "7.10.1",
+    "@babel/preset-env": "7.10.2",
     "@babel/preset-typescript": "^7.10.1",
-    "@rollup/plugin-alias": "^3.1.0",
+    "@rollup/plugin-alias": "^3.1.1",
     "@types/history": "^4.7.6",
     "@types/jest": "^25.2.3",
-    "@types/node": "^14.0.5",
+    "@types/node": "^14.0.12",
     "babel-core": "^7.0.0-bridge.0",
     "babel-jest": "^26.0.1",
     "babel-plugin-inferno": "6.1.1",
@@ -103,8 +103,8 @@
     "jest-silent-reporter": "^0.2.1",
     "jsdom": "^16.2.2",
     "lerna": "3.22.0",
-    "lint-staged": "^10.2.7",
-    "madge": "^3.9.0",
+    "lint-staged": "^10.2.9",
+    "madge": "^3.9.1",
     "merge-dirs": "^0.2.1",
     "minimist": "^1.2.5",
     "mobx": "4.8.0",
@@ -113,7 +113,7 @@
     "pre-commit": "^1.2.2",
     "prettier": "^2.0.5",
     "rimraf": "^3.0.2",
-    "rollup": "2.11.2",
+    "rollup": "2.15.0",
     "rollup-plugin-babel": "^4.4.0",
     "rollup-plugin-buble": "^0.19.8",
     "rollup-plugin-commonjs": "^10.1.0",
@@ -124,6 +124,6 @@
     "sinon": "^9.0.2",
     "tslint": "^6.1.2",
     "tslint-config-prettier": "^1.18.0",
-    "typescript": "3.9.3"
+    "typescript": "3.9.5"
   }
 }

packages/inferno/src/core/implementation.ts

@@ -207,21 +207,14 @@ export function normalizeProps(vNode) {
  * But not normalize, because otherwise those possibly get KEY and re-mount
  */
 function cloneFragment(vNodeToClone) {
-  let clonedChildren;
   const oldChildren = vNodeToClone.children;
   const childFlags = vNodeToClone.childFlags;
 
-  if (childFlags === ChildFlags.HasVNodeChildren) {
-    clonedChildren = directClone(oldChildren as VNode);
-  } else if (childFlags & ChildFlags.MultipleChildren) {
-    clonedChildren = [];
-
-    for (let i = 0, len = oldChildren.length; i < len; ++i) {
-      clonedChildren.push(directClone(oldChildren[i]));
-    }
-  }
-
-  return createFragment(clonedChildren, childFlags, vNodeToClone.key);
+  return createFragment(
+    childFlags === ChildFlags.HasVNodeChildren ? directClone(oldChildren as VNode) : oldChildren.map(directClone),
+    childFlags,
+    vNodeToClone.key
+  );
 }
 
 export function directClone(vNodeToClone: VNode): VNode {