18:46:30 Write to Excel2007 format<br />18:46:30 File written to 33chartcreate-bar-stacked.xlsx<br />18:46:30 Peak memory usage: 2 MB<br />18:46:30 Done writing file<br />File has been created in /home/fasttech/gymbrain.fasttechsoft.com/vendor/phpoffice/phpexcel/Examples<br />