How to get the data into ABAP internal tables from multiple sheets of an Excel sheet without OLE or classes/interfaces?

Hi Experts,

I have to read the data from multiple sheets.

I have gone through the links below to do the same also achieved the solution but very slow in retrieving the data.

http://wiki.scn.sap.com/wiki/display/Snippets/Read+multiple+sheets+of+an+Excel+file+into+SAP+through+ABAP

http://scn.sap.com/docs/DOC-40448

I tried with 6 rows and 6 columns in 2 sheet but it is taking too long to get the data into ABAP internal tables.

But in actual requirement, I have 2000 rows and 20 columns in each sheet. With this data it will definitely takes more time if I follow above approaches.

Can anyone suggest the alternative solution to get the data into ABAP internal table from multiple excel sheets with less time?

Thanks in advance.