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require 'benchmark/ips'
PASSAGE = <<~LIPSUM
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LIPSUM
raise unless PASSAGE.gsub(/ +/, " ") == PASSAGE.squeeze(" ")
def slow
PASSAGE.gsub(/ +/, " ")
end
def fast
PASSAGE.squeeze(" ")
end
Benchmark.ips do |x|
x.report('String#gsub/regex+/') { slow }
x.report('String#squeeze') { fast }
x.compare!
end