21:31:35 Load MergeBook1 from Excel2007 file<br />Call time to read Mergebook1 was 0.0492 seconds<br />21:31:35 Current memory usage: 4 MB<br />21:31:35 Load MergeBook2 from Excel2007 file<br />Call time to read Mergebook2 was 0.0038 seconds<br />21:31:35 Current memory usage: 4 MB<br />21:31:35 Write to Excel2007 format<br />21:31:35 File written to 43mergeWorkbooks.xlsx<br />Call time to write Workbook was 0.0241 seconds<br />21:31:35 Current memory usage: 6 MB<br />21:31:35 Peak memory usage: 6 MB<br />21:31:35 Done writing file<br />File has been created in D:\dev\vsk\vendor\phpoffice\phpexcel\Examples<br />