krists/saxlsx

Fast and memory efficient XLSX reader on top of Ox SAX parser

Saxlsx

Fast and memory efficient XLSX reader on top of Ox SAX parser.

It reads row by row and doesn't store the whole sheet in memory, so this approach is more suitable when parsing big files.

Installation

Add this line to your application's Gemfile:

gem 'saxlsx'

And then execute:

$ bundle

Or install it yourself as:

$ gem install saxlsx

Usage

Saxlsx::Workbook.open filename, auto_format: true do |w|
  w.sheets.each do |s|
    puts s.rows.count
    s.rows.each do |r|
      puts r.inspect
    end
  end
end

By default saxlsx will try to convert General type cells that look like numbers to ruby floats or integers. You can disable this feature using auto_format: false.

How fast is it?

$ rake bench

ruby 2.4.1 on OS X 10.12

Shared Strings

                           user     system      total        real
creek                  2.310000   0.040000   2.350000 (  2.414795)
dullard                1.660000   0.050000   1.710000 (  1.753160)
oxcelix                1.100000   0.060000   1.160000 (  1.169371)
roo                    2.770000   0.120000   2.890000 (  2.943509)
rubyXL                 3.570000   0.090000   3.660000 (  3.716661)
saxlsx                 0.620000   0.040000   0.660000 (  0.665471)
simple_xlsx_reader     1.590000   0.030000   1.620000 (  1.643398)

Inline Strings

                           user     system      total        real
creek                  2.840000   0.200000   3.040000 (  3.335055)
dullard                2.200000   0.250000   2.450000 (  2.613793)
oxcelix                   ERROR
roo                    3.550000   0.160000   3.710000 (  3.749528)
rubyXL                 3.890000   0.390000   4.280000 (  4.340749)
saxlsx                 0.930000   0.240000   1.170000 (  1.173783)
simple_xlsx_reader     1.760000   0.040000   1.800000 (  1.818311)

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request