How to reduce the load while analysing big file?

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Hello. I have 10 files of my packets captured. 1 file contains at least 2+ billion packets which cause big load for my system when I try to analyse file with endpoints, dialogues, etc. It can take up to 5-10 minutes to load it and then still lagging so much when I'm clicking "resolve names".

I think my pc not so bad, because it worked okay when I was analysing dump files with +-800k packets. So, are there any methods, maybe, how to divide analysis of 2 billion packets for 4 parts, for example?