read!

in lib/elastic_apm/metrics/cpu_mem_set.rb [162:189]

• 23 lines of code
• 2 McCabe index (conditional complexity)

          def read!
            stat =
              IO.readlines('/proc/stat')
                .lazy
                .find { |sp| sp.start_with?('cpu ') }
                .split
                .map(&:to_i)[1..-1]

            values =
              CPU_FIELDS.each_with_index.each_with_object({}) do |(key, i), v|
                v[key] = stat[i] || 0
              end

            @total =
              values[:user] +
              values[:nice] +
              values[:system] +
              values[:idle] +
              values[:iowait] +
              values[:irq] +
              values[:softirq] +
              values[:steal]

            @usage = @total - (values[:idle] + values[:iowait])

            self
          end