#1402 Get CountRows from sheet

[ivolkoff]

PR Details

Get CountRows from sheet

Description

Get CountRows from sheet

Related Issue

https://github.com/qax-os/excelize/issues/1402

Motivation and Context

Current solutions are slow. My solution is fast.

file 1М rows

-	-	-
BenchmarkFile_GetRows_Old-8	1	5797898958 ns/op
BenchmarkFile_GetRows_New-8	3	411330472 ns/op

How Has This Been Tested

Run test TestFile_CountRows

Types of changes

• [ ] Docs change / refactoring / dependency upgrade
• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [x] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.