Merge pull request #5 from feinmann/patch-2

Add {data.table} to example benchmarks for comparison

_literate/1_why_Julia.jl

@@ -683,7 +683,7 @@ inner(v::OneHotVector, A, w::OneHotVector) = A[v.ind, w.ind]
 #
 # ## Footnotes
 #
-# [^updatedversion]: please note that I've used updated versions for all languages and packages as of April, 2021. `DataFrames.jl` version 1.0.1, `Pandas` version 1.2.4, `NumPy` version 1.20.2 and `{dplyr}` version 1.0.5.
+# [^updatedversion]: please note that I've used updated versions for all languages and packages as of April, 2021. `DataFrames.jl` version 1.0.1, `Pandas` version 1.2.4, `NumPy` version 1.20.2, `{dplyr}` version 1.0.5. We did not cover R's `{data.table}` here. Further benchmarking information is available for example here: [Tabular data benchmarking](https://h2oai.github.io/db-benchmark/)
 # [^mvnimplem]: which of course I did not. The `Mvn` class is inspired by [Iason Sarantopoulos' implementation](http://blog.sarantop.com/notes/mvn).
 # [^mathbinormal]: you can find all the math [here](http://www.athenasc.com/Bivariate-Normal.pdf).
 # [^onehotpost]: the post in Russian, I've "Google Translated" it to English.