timestamp as dimension produced unnecessarily warning due to checks; this has been fixed.stringsAsFactors default configuration in data.frame.The conversion to Date or POSIXct is not forced anymore & depends on the initial class. This brings significant speed to all functions (provided the initial class is already date/timestamp);
There have been some other minor improvements in speed, e.g. applying basic transformations to columns through data.table’s set instead of lapply and .SD.
The collapse_ranges function got two new arguments, i.e. startAttr and endAttr - see ?collapse_ranges;
Moreover, the core function has been re-written in Rcpp for some speed gains.