13:22:52 Load MergeBook1 from Excel2007 file<br />Call time to read Mergebook1 was 0.0426 seconds<br />13:22:52 Current memory usage: 4 MB<br />13:22:52 Load MergeBook2 from Excel2007 file<br />Call time to read Mergebook2 was 0.0047 seconds<br />13:22:52 Current memory usage: 4 MB<br />13:22:52 Write to Excel2007 format<br />13:22:52 File written to 43mergeWorkbooks.xlsx<br />Call time to write Workbook was 0.0226 seconds<br />13:22:52 Current memory usage: 6 MB<br />13:22:52 Peak memory usage: 6 MB<br />13:22:52 Done writing file<br />File has been created in D:\dev\vsk\vendor\phpoffice\phpexcel\Examples<br />