43 Merge workbooks

11:33:09 Load MergeBook1 from Xlsx file
11:33:09 Read Xlsx format from /opt/bitnami/apache/htdocs/cdn/vendor/phpoffice/phpspreadsheet/samples/templates/43mergeBook1.xlsx in 0.0030 seconds
11:33:09 Load MergeBook2 from Xlsx file
11:33:09 Read Xlsx format from /opt/bitnami/apache/htdocs/cdn/vendor/phpoffice/phpspreadsheet/samples/templates/43mergeBook2.xlsx in 0.0022 seconds
11:33:09 Write Xlsx format to /tmp/phpspreadsheet/43_Merge_workbooks.xlsx in 0.0038 seconds
11:33:09 Write Xls format to /tmp/phpspreadsheet/43_Merge_workbooks.xls in 0.0030 seconds
11:33:09 Peak memory usage: 2MB