# File lib/railsbench/perf_utils.rb, line 100
def benchmark_file_name(benchmark, config_name, prefix=nil, suffix=nil)
  perf_data_dir = (ENV['RAILS_PERF_DATA'] ||= ENV['HOME'])
  date = Time.now.strftime '%m-%d'
  suffix = ".#{suffix}" if suffix
  ENV['RAILS_BENCHMARK_FILE'] =
    if config_name
      "#{perf_data_dir}/#{date}.#{benchmark}.#{config_name}#{suffix}.txt"
    else
      "#{perf_data_dir}/perf_run#{prefix}.#{benchmark}#{suffix}.txt"
    end
end