R - readRDS() & load() fail to give identical data.tables as the original

Question

Background

I tried to replace some CSV output files with rds files to improve efficiency. These are intermediate files that wi

Answer 1

The newly loaded data.table doesn't know the pointer value of the already loaded one. You could tell it with

attributes(bDT)$.internal.selfref <- attributes(aDT)$.internal.selfref
identical( aDT, bDT, ignore.environment = T )
# [1] TRUE

data.frame don't keep this attribute, probably because they don't do in place modification.