[R] Data Frame Search Slow

[TimothyDalbey]

Answer to my own question:

ush <- data.table(read.csv(...))
setkey(ush, product_id)
s1 <- ush[J[product.id]]



> user  system elapsed 
>   0.000   0.000   0.003 
> 

It seems like that's the method to use!  Amazing.

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