11:12:38 Enable Cell Caching using MemoryGZip method<br />11:12:38 Create new PHPExcel object<br />11:12:38 Set properties<br />11:12:38 Add data<br />11:12:38 Hide 'Phone' and 'fax' columns<br />11:12:38 Set outline levels<br />11:12:38 Freeze panes<br />11:12:38 Rows to repeat at top<br />11:12:39 Write to Excel2007 format<br />11:12:40 File written to 06largescale-with-cellcaching.xlsx<br />Call time to write Workbook was 1.7522 seconds<br />11:12:40 Current memory usage: 23.75 MB<br />11:12:40 Peak memory usage: 26.75 MB<br />11:12:40 Done writing file<br />File has been created in /var/www/yii2/vendor/phpoffice/phpexcel/Examples<br />