23:41:53 Load MergeBook1 from Excel2007 file<br />Call time to read Mergebook1 was 0.0406 seconds<br />23:41:53 Current memory usage: 2 MB<br />23:41:53 Load MergeBook2 from Excel2007 file<br />Call time to read Mergebook2 was 0.0038 seconds<br />23:41:53 Current memory usage: 2 MB<br />23:41:53 Write to Excel2007 format<br />23:41:53 File written to 43mergeWorkbooks.xlsx<br />Call time to write Workbook was 0.0993 seconds<br />23:41:53 Current memory usage: 4 MB<br />23:41:53 Peak memory usage: 4 MB<br />23:41:53 Done writing file<br />File has been created in D:\dev\vsk\vendor\phpoffice\phpexcel\Examples<br />