From 48b79d02e8a7c077eeae40bd94e3383067e54030 Mon Sep 17 00:00:00 2001 From: Carlos Rodrigues Date: Wed, 16 Oct 2019 20:34:51 +0100 Subject: [PATCH] perf(runtime-core): use faster diff map population (#319) --- packages/runtime-core/src/createRenderer.ts | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/packages/runtime-core/src/createRenderer.ts b/packages/runtime-core/src/createRenderer.ts index 3dabb11e2e..d2dd89afce 100644 --- a/packages/runtime-core/src/createRenderer.ts +++ b/packages/runtime-core/src/createRenderer.ts @@ -1502,8 +1502,8 @@ export function createRenderer< // and oldIndex = 0 is a special value indicating the new node has // no corresponding old node. // used for determining longest stable subsequence - const newIndexToOldIndexMap = [] - for (i = 0; i < toBePatched; i++) newIndexToOldIndexMap.push(0) + const newIndexToOldIndexMap = new Array(toBePatched) + for (i = 0; i < toBePatched; i++) newIndexToOldIndexMap[i] = 0 for (i = s1; i <= e1; i++) { const prevChild = c1[i] -- 2.47.3