21:06:49 Load MergeBook1 from Excel2007 file<br />Call time to read Mergebook1 was 0.0410 seconds<br />21:06:49 Current memory usage: 4 MB<br />21:06:49 Load MergeBook2 from Excel2007 file<br />Call time to read Mergebook2 was 0.0036 seconds<br />21:06:49 Current memory usage: 4 MB<br />21:06:49 Write to Excel2007 format<br />21:06:49 File written to 43mergeWorkbooks.xlsx<br />Call time to write Workbook was 0.0219 seconds<br />21:06:49 Current memory usage: 6 MB<br />21:06:49 Peak memory usage: 6 MB<br />21:06:49 Done writing file<br />File has been created in D:\dev\vsk\vendor\phpoffice\phpexcel\Examples<br />