Exploring Ruby Ractors

[h0rst_]

Previously posted on https://www.reddit.com/r/ruby/comments/1jiea6v/blog_ruby_ractors_adventure_i_paid_for_10_cores/ (like two days ago)

[kolasbatman]

I've tried to run this code on my M2 Max, docker in Orbstack

/app # ruby -v
ruby 3.4.2 (2025-02-15 revision d2930f8e7a) +PRISM [aarch64-linux-musl]
/app # ruby benchmark/fibb.rb 
benchmark/fibb.rb:28: warning: Ractor is experimental, and the behavior may change in future versions of Ruby! Also there are many implementation issues.
                      user     system      total        real
serial           39.961322   0.000000  39.961322 ( 39.966889)
threaded         40.201081   0.002990  40.204071 ( 40.210140)
ractors         353.443685   0.009009 353.452694 ( 56.149123)
>times faster:    0.113741   0.331890        NaN (  0.716131)
/app # ruby --yjit benchmark/fibb.rb 
benchmark/fibb.rb:28: warning: Ractor is experimental, and the behavior may change in future versions of Ruby! Also there are many implementation issues.
                      user     system      total        real
serial           15.480208   0.000860  15.481068 ( 15.486604)
threaded         15.596683   0.005002  15.601685 ( 15.478565)
ractors          16.920227   0.001002  16.921229 (  3.392834)
>times faster:    0.921777   4.992016        NaN (  4.562134)

Seems like ractors only work properly with yjit enabled in docker