With a 1000 rows .xlsx file
Rehearsal ------------------------------------------
rubyXL 0.540000 0.010000 0.550000 ( 0.552050)
creek 0.330000 0.000000 0.330000 ( 0.327936)
roo 0.410000 0.020000 0.430000 ( 0.425322)
--------------------------------- total: 1.310000sec