Avoid needless sort in Chunk compare

Author: Connormiha

lib/Chunk.js

@@ -313,17 +313,17 @@ class Chunk {
 	 * @returns {-1|0|1} this is a comparitor function like sort and returns -1, 0, or 1 based on sort order
 	 */
 	compareTo(otherChunk) {
-		this._modules.sort();
-		otherChunk._modules.sort();
 		if (this._modules.size > otherChunk._modules.size) return -1;
 		if (this._modules.size < otherChunk._modules.size) return 1;
+		this._modules.sort();
+		otherChunk._modules.sort();
 		const a = this._modules[Symbol.iterator]();
 		const b = otherChunk._modules[Symbol.iterator]();
 		// eslint-disable-next-line no-constant-condition
 		while (true) {
 			const aItem = a.next();
-			const bItem = b.next();
 			if (aItem.done) return 0;
+			const bItem = b.next();
 			const aModuleIdentifier = aItem.value.identifier();
 			const bModuleIdentifier = bItem.value.identifier();
 			if (aModuleIdentifier < bModuleIdentifier) return -1;