Hi,
33ms is forever in micro processor terms. My guess without seeing your latest code or giving more than a cursory glance to your previous code posted earlier in the topic is that the first problem is writing to the EEPROM, thats slow, you might be better off writing to an external SD Card which I believe is a lot faster.
Secondly the floating point maths is going to be slow.
I think I mentioned this project of mine to you before, I have made a lot more progress on it in the last few weeks -
Duane B.