AssetsManagerEx.cpp AssetsManagerEx::prepareUpdate, cost a lot of times

[tangkaikk]

Cocos Creator version

3.x 2.x

System information

Android & IOS

Issue description

when compare the manifest file of 8 M in function of AssetsManagerEx::prepareUpdate, it costs 37586ms, 。 Is there any way to optimize this problem.

The cost time comes from mumu模拟器V4.0.3。

The phones to be low speed: Oppo find x vivo iqoo u3

Relevant error log output

none

Steps to reproduce

none

Minimal reproduction project

here is the manifests. Downloads.zip No response

[zhefengzhang]

hot-update-test.zip

在构建原生平台游戏，并运行在设备上，点击游戏画面右上角的版本更新按钮，会自动下载远程资源服务器上的版本信息文件，然后自动进入热更检查阶段。

[qiuguohua]

是因为数据太多，而且每个数据操作了json，导致很慢。 现在把函数改成异步的了。不回卡住ui