ruby.git/benchmark/ivar_extend.yml, branch v3_3_11 The Ruby Programming Language Eagerly allocate instance variable tables along with object 2021-05-03T21:11:48+00:00 Aaron Patterson tenderlove@ruby-lang.org 2021-02-23T00:18:10+00:00 9a6226c61ea8a8ae7b3516b693a0d6e73526a99f This allows us to allocate the right size for the object in advance, meaning that we don't have to pay the cost of ivar table extension later. The idea is that if an object type ever became "extended" at some point, then it is very likely it will become extended again. So we may as well allocate the ivar table up front. 
This allows us to allocate the right size for the object in advance,
meaning that we don't have to pay the cost of ivar table extension
later.  The idea is that if an object type ever became "extended" at
some point, then it is very likely it will become extended again.  So we
may as well allocate the ivar table up front.