String Identifier Argument demands slower-performing code

[p-datadog]

String Identifier Argument check wants to change code like

"foo#{bar}"

to

:"foo#{bar}"

claiming the second version is faster.

I wrote a benchmark to check, and it shows that the second version is about half as fast as the first one:

require 'benchmark'

def bar
  1
end

p(Benchmark.realtime do
  1_000_000.times do
    "foo#{bar}"
  end
end)


p(Benchmark.realtime do
  1_000_000.times do
    :"foo#{bar}"
  end
end)

Result:

0.082756486008293
0.1312436139996862

I do expect literal symbols to perform faster than literal strings but not the case when the value is an interpolated string.

[p-datadog]

 rubocop -V
1.71.2 (using Parser 3.3.7.1, rubocop-ast 1.38.1, analyzing as Ruby 2.6, running on ruby 3.3.4) [x86_64-linux]
  - rubocop-packaging 0.5.2
  - rubocop-performance 1.23.1
  - rubocop-rspec 3.4.0