95 lines
3.7 KiB
Ruby
95 lines
3.7 KiB
Ruby
require 'benchmark'
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module ActionController #:nodoc:
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# The benchmarking module times the performance of actions and reports to the logger. If the Active Record
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# package has been included, a separate timing section for database calls will be added as well.
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module Benchmarking #:nodoc:
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def self.included(base)
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base.extend(ClassMethods)
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base.class_eval do
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alias_method_chain :perform_action, :benchmark
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alias_method_chain :render, :benchmark
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end
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end
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module ClassMethods
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# Log and benchmark the workings of a single block and silence whatever logging that may have happened inside it
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# (unless <tt>use_silence</tt> is set to false).
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#
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# The benchmark is only recorded if the current level of the logger matches the <tt>log_level</tt>, which makes it
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# easy to include benchmarking statements in production software that will remain inexpensive because the benchmark
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# will only be conducted if the log level is low enough.
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def benchmark(title, log_level = Logger::DEBUG, use_silence = true)
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if logger && logger.level == log_level
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result = nil
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seconds = Benchmark.realtime { result = use_silence ? silence { yield } : yield }
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logger.add(log_level, "#{title} (#{'%.5f' % seconds})")
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result
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else
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yield
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end
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end
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# Silences the logger for the duration of the block.
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def silence
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old_logger_level, logger.level = logger.level, Logger::ERROR if logger
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yield
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ensure
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logger.level = old_logger_level if logger
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end
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end
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protected
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def render_with_benchmark(options = nil, extra_options = {}, &block)
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unless logger
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render_without_benchmark(options, extra_options, &block)
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else
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db_runtime = ActiveRecord::Base.connection.reset_runtime if Object.const_defined?("ActiveRecord") && ActiveRecord::Base.connected?
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render_output = nil
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@rendering_runtime = Benchmark::realtime{ render_output = render_without_benchmark(options, extra_options, &block) }
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if Object.const_defined?("ActiveRecord") && ActiveRecord::Base.connected?
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@db_rt_before_render = db_runtime
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@db_rt_after_render = ActiveRecord::Base.connection.reset_runtime
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@rendering_runtime -= @db_rt_after_render
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end
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render_output
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end
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end
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private
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def perform_action_with_benchmark
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unless logger
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perform_action_without_benchmark
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else
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runtime = [ Benchmark::measure{ perform_action_without_benchmark }.real, 0.0001 ].max
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log_message = "Completed in #{sprintf("%.5f", runtime)} (#{(1 / runtime).floor} reqs/sec)"
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log_message << rendering_runtime(runtime) if defined?(@rendering_runtime)
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log_message << active_record_runtime(runtime) if Object.const_defined?("ActiveRecord") && ActiveRecord::Base.connected?
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log_message << " | #{headers["Status"]}"
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log_message << " [#{complete_request_uri rescue "unknown"}]"
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logger.info(log_message)
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response.headers["X-Runtime"] = sprintf("%.5f", runtime)
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end
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end
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def rendering_runtime(runtime)
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percentage = @rendering_runtime * 100 / runtime
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" | Rendering: %.5f (%d%%)" % [@rendering_runtime, percentage.to_i]
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end
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def active_record_runtime(runtime)
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db_runtime = ActiveRecord::Base.connection.reset_runtime
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db_runtime += @db_rt_before_render if @db_rt_before_render
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db_runtime += @db_rt_after_render if @db_rt_after_render
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db_percentage = db_runtime * 100 / runtime
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" | DB: %.5f (%d%%)" % [db_runtime, db_percentage.to_i]
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end
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end
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end
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