xlsx parsing in ruby

gistfile1.txt

XLSX file, 1.5 Mb, 10 000 rows

==================================

Benchmark.measure { ::Creek::Book.new(import.import_file.read.path).sheets.first.rows.first }
<Benchmark::Tms:0x0000010eb1b200
 @cstime=0.0,
 @cutime=0.0,
 @label="",
 @real=83.360489,
 @stime=0.9699999999999998,
 @total=78.46,
 @utime=77.49>


Benchmark.measure { ::Saxlsx::Workbook.open(import.import_file.read.path) {|w| w.sheets.first.rows.first } }
<Benchmark::Tms:0x00000101176608
 @cstime=0.0,
 @cutime=0.0,
 @label="",
 @real=0.551811,
 @stime=0.07000000000000028,
 @total=0.529999999999994,
 @utime=0.45999999999999375>

Benchmark.measure { ::SimpleXlsxReader.open(import.import_file.read.path).sheets.first.rows.first }
<Benchmark::Tms:0x00000130a20360
 @cstime=0.0,
 @cutime=0.0,
 @label="",
 @real=51.066787,
 @stime=1.4100000000000001,
 @total=49.68000000000001,
 @utime=48.27000000000001>

Benchmark.measure { ::Oxcelix::Workbook.new(import.import_file.read.path, :copymerge => false) }
NoMethodError: undefined method name=' for #<Matrix:0x0000014bea92b8>
from /Users/g3d/.rvm/gems/ruby-2.1.1@gemsetname/gems/oxcelix-0.4.0/lib/oxcelix/workbook.rb:277:in `block in matrixto'

Benchmark.measure { ::Roo::Excelx.new(import.import_file.read.path).sheets.first }
<Benchmark::Tms:0x000001052c94c0
 @cstime=0.0,
 @cutime=0.0,
 @label="",
 @real=68.535196,
 @stime=0.9299999999999997,
 @total=66.37,
 @utime=65.44>

Benchmark.measure { ::Spreadsheet.open(import.import_file.read.path).worksheet(0).row(1) } # xlsx not support 
Ole::Storage::FormatError: OLE2 signature is invalid
from /Users/g3d/.rvm/gems/ruby-2.1.1@isis/gems/ruby-ole-1.2.11.7/lib/ole/storage/base.rb:378:in validate!

Benchmark.measure { ::RubyXL::Parser.parse(import.import_file.read.path).worksheets[0].sheet_data[0] }
<Benchmark::Tms:0x0000012a0c9f10
 @cstime=0.0,
 @cutime=0.0,
 @label="",
 @real=33.429753,
 @stime=0.96,
 @total=32.519999999999996,
 @utime=31.559999999999995>
 
Benchmark.measure { ::Dullard::Workbook.new(import.import_file.read.path).sheets[0].rows[0] }
<Benchmark::Tms:0x000001136fd600
 @cstime=0.0,
 @cutime=0.0,
 @label="",
 @real=0.744242,
 @stime=0.03999999999999915,
 @total=0.6699999999999999,
 @utime=0.6300000000000008>
 
=================================

Conclusion: dullard & saxlsx show best results, but:
- Saxlsx return Saxlsx::RowsCollection for rows
- Dullard return Enumerator for rows (return not correct string data for rows)