Do ruby strings leak timing info when comparing with == ?

gistfile1.rb

require 'benchmark'

ace1 = 'a' + ('b' * 10000)
ace2 = 'a' + ('b' * 10000)
lastace = ('b' * 10000) + 'a'
bees = 'b' * 10001

n = 10000000

Benchmark.bmbm do |x|
  x.report ('same str') { n.times { ace1 == ace2 } }
  x.report ('first char diff') { n.times { ace1 == bees } }
  x.report ('last char diff') { n.times { bees == lastace } }
end