12:37:51 Load MergeBook1 from Excel2007 file<br />Call time to read Mergebook1 was 0.0673 seconds<br />12:37:51 Current memory usage: 4 MB<br />12:37:51 Load MergeBook2 from Excel2007 file<br />Call time to read Mergebook2 was 0.0050 seconds<br />12:37:51 Current memory usage: 4 MB<br />12:37:51 Write to Excel2007 format<br />12:37:51 File written to 43mergeWorkbooks.xlsx<br />Call time to write Workbook was 0.0239 seconds<br />12:37:51 Current memory usage: 6 MB<br />12:37:51 Peak memory usage: 6 MB<br />12:37:51 Done writing file<br />File has been created in D:\dev\vsk\vendor\phpoffice\phpexcel\Examples<br />