Does julia optimize code where the types of some variables are known approximately but not exactly? For example, this issue makes the return type of slicedim either an n or n+1 dimensional array. Are there performance benefits?
Jared Crean
There are fast paths for unions with less than a certain number of types in them.
Where is this documented? I read stuff in the past that this could be done, but I wasn’t aware it was implemented.