tree b7af445c2b08aa760b3315c6083c4bb30387f2ee
parent b4c353434f28f3e9d4c45e61d42b4fd07d76cad2
author Roberto Ierusalimschy <roberto@inf.puc-rio.br> 1596053147 -0300
committer Roberto Ierusalimschy <roberto@inf.puc-rio.br> 1596053147 -0300

Optimization in 'markold'

OLD1 objects can be potentially anywhere in the 'allgc' list (up
to 'reallyold'), but frequently they are all after 'old1' (natural
evolution of survivals) or do not exist at all (when all objects die
young). So, instead of 'markold' starts looking for them always
from the start of 'allgc', the collector keeps an extra pointer,
'firstold1', that points to the first OLD1 object in the 'allgc' list,
or is NULL if there are no OLD1 objects in that list.