21:03:12 Enable Cell Caching using MemoryGZip method<br />21:03:12 Create new PHPExcel object<br />21:03:12 Set properties<br />21:03:12 Add data<br />21:03:12 Hide 'Phone' and 'fax' columns<br />21:03:12 Set outline levels<br />21:03:12 Freeze panes<br />21:03:12 Rows to repeat at top<br />21:03:12 Write to Excel2007 format<br />21:03:14 File written to 06largescale-with-cellcaching.xlsx<br />Call time to write Workbook was 1.4677 seconds<br />21:03:14 Current memory usage: 24 MB<br />21:03:14 Peak memory usage: 28 MB<br />21:03:14 Done writing file<br />File has been created in /var/www/customs_rongma/vendor/phpoffice/phpexcel/Examples<br />