title: PHP spreadsheet library
body: <p>We are currently using PHP Spreadsheet_Excel_Writer library for generating excel sheet based reports. The library is consuming a lot of memory/time when we are trying to generate reports containing 20k-25k rows. Many times it takes above 20 sec for generating a file.</p>
  
  <p>Any suggestions on which library can be used instead of Spreadsheet_excel_writer for handling large files? Any idea how PHPExcel fares with large files ?</p>