Optimize nested lists

[jeroen]

See the example here: https://twitter.com/layik/status/1052499262460841984

[dcooley]

perhaps this is resolved now? - https://gist.github.com/layik/9d20af29cbee934fd91d59a9f96dbe90#gistcomment-3321062

[jeroen]

I haven't really touched anything so I'm not sure how the benchmark has changed...

[dcooley]

perhaps R4.0 has had an unplanned benefit?

[jeroen]

I'm more suspicious of the benchmarking used here. Better use bench::mark to get a proper comparison.

[dcooley]

Turns out I had made a mistake and hand't use the correct object to start with - https://gist.github.com/layik/9d20af29cbee934fd91d59a9f96dbe90#gistcomment-3321944