[Rd] Just-in-time compiler for R

[Stephen Milborrow]

Greetings R developers!

I have been working on a just-in-time compiler for R arithmetic expressions.
An example:


    jit(1)                       # turn on just-in-time compilation
    for(i in 1:na)            # example convolution code
        for(j in 1:nb)
          ab[i + j] <- ab[i + j] + a[i] * b[j]


The loop will run about 30% faster. That's not much of a speedup, but the
code is still in early development and the figure will get much better.

If you are interested there is more information at
www.milbo.users.sonic.net/ra.




Stephen Milborrow
www.milbo.users.sonic.net