15:37:13 Read Slk format from /var/www/html/testcheckoutcardnet/vendor/phpoffice/phpspreadsheet/samples/Basic/../templates/SylkTest.slk in 0.0067 seconds 15:37:13 Write Xlsx format to /tmp/phpspreadsheet/20_Read_Sylk.xlsx in 0.0056 seconds 15:37:13 Write Xls format to /tmp/phpspreadsheet/20_Read_Sylk.xls in 0.0040 seconds 15:37:13 Peak memory usage: 6MB