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Comment on BTables: A fast, compact format for Machine Learning

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The BTables discussion takes me back to memories of my first college computing class (in FORTRAN). We were asked how we might store a sparse matrix in less memory. The solution was exactly the same as BTables. We thought we'd done something novel when the professor pointed out that it had already been implemented in the 60s.

Great ideas never fade. They do get reinvented :).

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