CSV Import Speeds With H2O

Kevin Feasel



WenSui Liu benchmarks three CSV loading methods in R:

The importFile() function in H2O is extremely efficient due to the parallel reading. The benchmark comparison below shows that it is comparable to the read.df() in SparkR and significantly faster than the generic read.csv().

I’d wonder if there are cases where this would vary significantly; regardless, for reading a large data file, parallel processing does tend to be faster.

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