43 Merge workbooks

11:43:24 Load MergeBook1 from Xlsx file
11:43:24 Read Xlsx format from /opt/bitnami/apache/htdocs/cdn/vendor/phpoffice/phpspreadsheet/samples/templates/43mergeBook1.xlsx in 0.0045 seconds
11:43:24 Load MergeBook2 from Xlsx file
11:43:24 Read Xlsx format from /opt/bitnami/apache/htdocs/cdn/vendor/phpoffice/phpspreadsheet/samples/templates/43mergeBook2.xlsx in 0.0025 seconds
11:43:24 Write Xlsx format to /tmp/phpspreadsheet/43_Merge_workbooks.xlsx in 0.0046 seconds
11:43:24 Write Xls format to /tmp/phpspreadsheet/43_Merge_workbooks.xls in 0.0036 seconds
11:43:24 Peak memory usage: 2MB