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Added BenchmarkHelper that can measure the execution time of a block …

…in a template and reports the result to the log

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1240 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
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1 parent a2ef977 commit fbd86c201722ac319818dc339d12d9716e4d13d9 @dhh dhh committed
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  1. +22 −0 actionpack/lib/action_view/helpers/benchmark_helper.rb
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22 actionpack/lib/action_view/helpers/benchmark_helper.rb
@@ -0,0 +1,22 @@
+require 'benchmark'
+
+module ActionView
+ module Helpers
+ module BenchmarkHelper
+ # Measures the execution time of a block in a template and reports the result to the log. Example:
+ #
+ # <% benchmark "Notes section" do %>
+ # <%= expensive_notes_operation %>
+ # <% end %>
+ #
+ # Will add something like "Notes section (0.345234)" to the log.
+ def benchmark(message = "Benchmarking", &block)
+ bm = Benchmark.measure do
+ block.call
+ end
+
+ @logger.info("#{message} (#{bm.real})")
+ end
+ end
+ end
+end

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