Slow rendering when firstRender with layoutColumnsOnNewData: true

[mihalikv]

Describe the bug
I have a table with around 35 columns and 100 rows with pagination. When table is first rendered it takes some time to "boot up".
I think that it is possible to reduce initial render time by reducing call to layoutRefresh.

When table is first rendered profile looks like this:

When we already have table initialized and we call setData, result is following:

It means that when we load table for the first time, layoutRefresh is already call-ed because of this line https://github.com/olifolkerd/tabulator/blob/master/src/js/core/RowManager.js#L931

My proposal is to somehow prevent calling layoutRefresh twice, when the table is initialized.

Tabulator Info
Tabulator version 6.2.0
layoutColumnsOnNewData: true

Working Example
https://jsfiddle.net/ogy0rfh7/1/

To Reproduce
A step by step guide to recreate the issue in your JS Fiddle or Codepen:

1. Enable CPU throttling 6x slowdown
2. Record profiling
3. Click on "Init Table"
4. Click on "Update Table"
5. Pause CPU profiling

Expected behavior
Create table as fast as possible.