Reducing multiple Group by statements in a transformation

[anm]

Hi,

I have a transformation here which requires about 30 (and more) different sort and group by options which multiplies the amount of rows processed to around 2.5mio x 30.

Is there a JavaScript step which could be written instead of the original steps (i.e. do sort and groupby functions in JavaScript exist) or is there another possibility / approach to reduce the amount of rows where multiple group by are required?

Thanks,
anm