Yes, <a href="http:&#x2F;&#x2F;unicorn.bogomips.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;unicorn.bogomips.org&#x2F;</a> popularized this for ruby &#x2F; rack &#x2F; rails with its forking model and preload_app option. <a href="http:&#x2F;&#x2F;puma.io&#x2F;" rel="nofollow">http:&#x2F;&#x2F;puma.io&#x2F;</a> does the same thing, but additionally runs multiple threads in each process.<p>The garbage collector in Ruby 1.8 &#x2F; 1.9 negated the benefits of copy-on-write forking, but that&#x27;s fixed since Ruby 2.0