Benchmark: Interning strings and string variables in Ruby

gistfile1.rb

# :"test" is faster than "test".intern ...
Benchmark.bm do |x|
  test = 'test'
  x.report { 1000000.times  { "test".intern } }
  x.report { 1000000.times { :"test" } }
end
#       user     system      total        real
#   0.430000   0.000000   0.430000 (  0.429735)
#   0.080000   0.000000   0.080000 (  0.082169)

# But :"#{test}" is slower than test.intern.
Benchmark.bm do |x|
  test = 'test'
  x.report { 1000000.times  { test.intern } }
  x.report { 1000000.times { :"#{test}" } }
end
#     user     system      total        real
# 0.250000   0.000000   0.250000 (  0.247637)
# 0.430000   0.000000   0.430000 (  0.438851)