19:51:45 Enable Cell Caching using MemoryGZip method<br />19:51:45 Create new PHPExcel object<br />19:51:46 Set properties<br />19:51:46 Add data<br />19:51:46 Hide 'Phone' and 'fax' columns<br />19:51:46 Set outline levels<br />19:51:46 Freeze panes<br />19:51:46 Rows to repeat at top<br />19:51:47 Write to Excel2007 format<br />19:51:49 File written to 06largescale-with-cellcaching.xlsx<br />Call time to write Workbook was 1.6380 seconds<br />19:51:49 Current memory usage: 24 MB<br />19:51:49 Peak memory usage: 28 MB<br />19:51:49 Done writing file<br />File has been created in /var/www/customs_yiao/vendor/phpoffice/phpexcel/Examples<br />