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by kyllo
4733 days ago
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It's not a speed optimization. It just allows you to process a much larger dataset than you can fit in main memory. It will be slow because it's hard disk I/O, but you can do a sparse matrix multiplication on terabytes worth of data in a database with SQL. You couldn't do that in Python or Java without running out of memory, unless you used a MapReduce job distributed to many worker machines--and then you'd get a bill for the EC2 time or whatever. |
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