Ruby

Optimize benchmark/vm_ivar_of_class

compare-ruby: ruby 3.5.0dev (2025-06-17T08:45:40Z master e9d35671d2) +PRISM [arm64-darwin24] last_commit=[ruby/json] Fix a typo built-ruby: ruby 3.5.0dev (2025-06-17T09:27:05Z opt-getivar-for-cl.. ed1d7cd778) +PRISM [arm64-darwin24] | |compare-ruby|built-ruby| |:---------------------|-----------:|---------:| |vm_ivar_of_class_set | 12.306M| 13.957M| | | -| 1.13x| |vm_ivar_of_class | 16.167M| 24.029M| | | -| 1.49x|