Ruby #find_all vs V8 filter()

gistfile1.txt

require 'rubygems'
require 'json'
require 'v8'

input = 'suggestions.txt'
suggestions = []

p "Loading suggestions..."
File.open(input, 'r').each { |line| suggestions << line.strip }

q = "beat"

cxt = V8::Context.new
cxt['suggestions'] = suggestions
cxt['q'] = q

start = Time.now
matches = suggestions.find_all{ |s| s.match(q) }
p "Ruby matches found: #{(Time.now - start) * 1000}ms, count: #{matches.size}"


start = Time.now
matches = suggestions.find_all do |s|
  cxt['suggestion'] = s
  cxt.eval('suggestion.search(q)') > -1
end
p "V8/ruby #find_all matches found: #{(Time.now - start) * 1000}ms, count: #{matches.size}"


start = Time.now
matches = Array(cxt.eval(<<-eojs
suggestions.filter(function(suggestion) {
        return suggestion.search(q) > -1;
    });
eojs
))
p "V8/js filter matches found: #{(Time.now - start) * 1000}ms, count: #{matches.size}"