fix: remove body row array wrapper

[cncolder]

@afc163 This seem like a typo. But it will slow down antd 4 table render.

Let me show you detail:

In a non-empty table. The rows is [[BodyRow], [BodyRow2] ...] currently. Every time user insert data into table. Existed rows will recreate even they have same keys. I think most user show table with pagination. So people ignore this for a long time.

This pr fix ant-design/ant-design#25224 , you can try reproduction demo in that issue. There are two gif show the difference between ant3 and ant4.

[codecov]

Codecov Report

Merging #498 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #498   +/-   ##
=======================================
  Coverage   99.70%   99.70%           
=======================================
  Files          23       23           
  Lines         670      670           
  Branches      191      191           
=======================================
  Hits          668      668           
  Misses          2        2           

Impacted Files	Coverage Δ
src/Body/index.tsx	100.00% <100.00%> (ø)

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[cncolder]

@zombieJ 目前我通过复制 node_modules/rc-table/lib 文件夹, 修改编译后的代码, 之后用 webpack alias 指向新目录这种方式用在真实项目里, 对 antd <Table> 组件性能提升显著, 尤其是在行频繁变换位置时.

[zombieJ]

的确是一个手误，thx！

[zombieJ]

+ rc-table@7.8.2

[afc163]

是不是也能解决 ant-design/ant-design#25234 ？

[zombieJ]

全部刷新是因为不知道 columns.render 里会用到什么，所以总是全量更新。和这个 PR 没关系。

[cncolder]

columns.render 应该只影响 td 里面的内容吧, 25234 中提到删除行, 之后的所有 tr 重新渲染, 应该和我的问题相同.

[zombieJ]

删除行影响了 dataSource。你不知道 render 里有没有用到它所以也需要重新渲染：

const columns = [
  {
    // ...
    render: () => dataSource.length,
  },
];