benchmark regression

[ben-schwen]

I just had a look at the ducklabs benchmarks and it seems that there has been regression for:

max v1 - min v2 by id3
x[, .(range_v1_v2=max(v1, na.rm=TRUE)-min(v2, na.rm=TRUE)), by=id3]

See the xlarge instance (with 256 GB memory) and 0.5 GB dataset where it takes ~57 seconds while running instant on the 32 GB memory instance (on a previos data.table version).

Would be nice to sort this out #7401 will make this case a lot faster.

Update: I have run this locally and #7401 takes down the regression from 24 seconds to 0.297 seconds :)