R-script call slow ?

[xerviami]

Hi,

I call r-script a lot of times (hundreds). in my node script.
Each call of r-script takes 1s whereas nothing is performed in the R script (just gives back a number without any computation).

In my node script, I put a "console.log(new Date());" before AND after calling r-script -> this is how I evaluated duration of r-script call.

Do you know how to make things faster ?

Thank you in advance
Kind regards
XAvier

[DrMMu]

I have also noted that calling R from Node.js involves quite some overhead.
I don't know how to speed up the R call.

Since you are calling R hundreds of times, it would be beneficial if R would not be terminated between the separate calls. However, I have no idea how to realize this quickly in the given Node.js environment. You would need some kind of R demon or R server running all the time, and then you would pass your scripts to it. This would at least save you the constant starting / terminating of RScript.

What you maybe can do: I understand that you loop through "something", resulting in hundreds of calls to R. Can you move that loop to R directly?

Br, M.