Large strings in Ruby

split("\n") is 30% faster than lines.map(&:chomp).

> Benchmark.measure { s.lines.map(&:chomp) }
   8.250000   0.160000   8.410000 (  8.446753)
   
> Benchmark.measure { s.split("\n") }
  5.540000   0.150000   5.690000 (  5.717570)