500 million observations, with 4-byte floats, is 2 GB. This is the kind of size that you can store uncompressed, in RAM, on a phone. It is hardly at the point w

500 million observations, with 4-byte floats, is 2 GB. This is the kind of size that you can store uncompressed, in RAM, on a phone. It is hardly at the point where you require specialized time-series software at all.