Make matrix visualization faster

[glebLit]

Describe what feature you'd like. Pseudo-code, mockups, or screenshots of similar solutions are encouraged!

Too slow visualization of big (2000*2000 elements) matrix in "surface" mode.
Big Matrix.txt

What type of pull request would this be?

Enhancement

Any links to similar examples or other references we should review?

No response

[ValeryStk]

Thanks Gleb!
We are working on it at present time.