[plt-scheme] (fast) reading of data files into a hash-table - how?

Hi,
I need to load a large amount of precomputed data.
It is bassically a list of key:value pairs, where each key is a list
of symbols and each value is a number. I have about 14000 such keys.

I tried to just read the data line by line and put it into a
hash-table, but it turns out creating a hash-table with 'equal, and
then filling it with 14000 values takes way to much processing time.
Is there any way to speed things up?


Thanks,
Yoav