Small speedup on autosizing column width

[Bykiev]

Small speedup on autosizing column width

[Bykiev]

@tonyqus, we can also improve the speed if we will use parallel programming while looping over the rows. What do you think about it?

[tonyqus]

parallel programming is somewhat dangerous to cause CPU 100% if you don't limit the parallel number.

We can try this. But we may need to carefully test this.

[Bykiev]

parallel programming is somewhat dangerous to cause CPU 100% if you don't limit the parallel number.

We can try this. But we may need to carefully test this.

Thanks, I think these experiments for another PR, this one can be merged without any issues

[Bykiev]

Thought after applying caching this PR doesn't improve performance, the code is cleaner by removing unused code.

Benchmarks.

Before:

Method	RowCount	ColumnCount	Mean	Error	StdDev	Gen0	Allocated
AutoSizeColumn	1000	5	433.1 ms	6.87 ms	6.75 ms	75000.0000	117.23 MB

After:

Method	RowCount	ColumnCount	Mean	Error	StdDev	Gen0	Allocated
AutoSizeColumn	1000	5	428.3 ms	6.04 ms	5.65 ms	75000.0000	117.23 MB

[tonyqus]

LGTM