This is painfully slow in vim. I am using vim 7.4 with compiled ruby support and the vim-tomorrow-colorscheme. ``:syntax off`` and the performance is as good as you would expect. ``:syntax on`` and it's barely useable. ``set re=1`` as suggested on various SO-posts doesn't help.

slow_vim.rb

def test
  dummy = [
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    { a: 123, b: "hello", c: :whoa, another_key: "i don't know what to say here", even_more: "okay now it gets huge" },
    ]
end

puts "dummy scroll code goes here"
puts "dummy scroll code goes here"
puts "dummy scroll code goes here"
puts "dummy scroll code goes here"
puts "dummy scroll code goes here"
puts "dummy scroll code goes here"
puts "dummy scroll code goes here"
puts "dummy scroll code goes here"
puts "dummy scroll code goes here"
puts "dummy scroll code goes here"
puts "dummy scroll code goes here"