Improving performance in import xml files to android device

In my android application i use SAX Parser in order to import large xml files (35-40 MB) into sqlite database. My tablet has a quad core processor (1,3 GHz) and 1 GB RAM. The file upload around 4-5 minutes.

I need to improve the performance of uploading.

What is the maximum performance of SAX parser (MB per minute)? If I need to improve hardware of my device what need to improve (Processor, RAM etc)?