23:44:57 Load MergeBook1 from Excel2007 file<br />Call time to read Mergebook1 was 0.0412 seconds<br />23:44:57 Current memory usage: 4 MB<br />23:44:57 Load MergeBook2 from Excel2007 file<br />Call time to read Mergebook2 was 0.0037 seconds<br />23:44:57 Current memory usage: 4 MB<br />23:44:57 Write to Excel2007 format<br />23:44:57 File written to 43mergeWorkbooks.xlsx<br />Call time to write Workbook was 0.0236 seconds<br />23:44:57 Current memory usage: 6 MB<br />23:44:57 Peak memory usage: 6 MB<br />23:44:57 Done writing file<br />File has been created in D:\dev\vsk\vendor\phpoffice\phpexcel\Examples<br />