BUILT-IN MATHEMATICA SYMBOL

RuntimeAttributes

RuntimeAttributes
is an option for Compile that specifies attributes for the compiled function it creates.

RuntimeAttributes->Listable is effectively equivalent to the Listable attribute of the built-in function.

If a compiled function with Listable attribute matches its argument specification, it will run in the normal way.

If a compiled function with Listable attribute receives any arguments with higher rank than specified, the function will thread over these arguments.

This creates a compiled function that is listable:

It operates on a single input in normal fashion:

When the arguments include a list that does not match the input specification, it threads the function over that argument:

This compiled function is not listable:

An error results when the argument specification does not match:

If there is a branch, listability needs a function to be defined, as shown below using Function:

A listable compiled function does the same thing much faster:

A listable compiled function can run in parallel, giving an acceleration on multicore machines:

This creates a compiled function that is listable:

Out[1]=

It operates on a single input in normal fashion:

Out[2]=

When the arguments include a list that does not match the input specification, it threads the function over that argument:

Out[3]=

This compiled function is not listable:

Out[4]=

An error results when the argument specification does not match:

Out[5]=

If there is a branch, listability needs a function to be defined, as shown below using Function:

Out[1]=

A listable compiled function does the same thing much faster:

Out[2]=

A listable compiled function can run in parallel, giving an acceleration on multicore machines:

Out[1]=