Volker Springel talks about the new GADGET-4 code.

Featuring all the things you wanted to know about GADGET-4 but were afraid to ask, including:

– What new algorithms are used to make it better and faster than earlier versions
– Why you never heard of GADGET-3
– What new features you can now use when running cosmological simulations (e.g. varying the algorithms; or outputting lightcones, halo catalogues and merger trees “on the fly”)
– why storing the locations of your simulation particles as integers is better than storing them as floating point numbers
– and what the author of the most used simulation code in cosmology thinks are the most interesting questions in cosmology at the moment (both related and unrelated to simulations)

You could read the 80 page paper, or you could just watch this video instead!

Volker: https://www.mpa-garching.mpg.de/person/55019/2377
GADGET-4 code: https://wwwmpa.mpa-garching.mpg.de/gadget4/
Code paper: https://arxiv.org/abs/2010.03567