1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
require 'active_support/core_ext/benchmark'
require 'active_support/core_ext/hash/keys'
module ActiveSupport
module Benchmarkable
# Allows you to measure the execution time of a block
# in a template and records the result to the log. Wrap this block around
# expensive operations or possible bottlenecks to get a time reading
# for the operation. For example, let's say you thought your file
# processing method was taking too long; you could wrap it in a benchmark block.
#
# <% benchmark "Process data files" do %>
# <%= expensive_files_operation %>
# <% end %>
#
# That would add something like "Process data files (345.2ms)" to the log,
# which you can then use to compare timings when optimizing your code.
#
# You may give an optional logger level as the :level option.
# (:debug, :info, :warn, :error); the default value is :info.
#
# <% benchmark "Low-level files", :level => :debug do %>
# <%= lowlevel_files_operation %>
# <% end %>
#
# Finally, you can pass true as the third argument to silence all log activity
# inside the block. This is great for boiling down a noisy block to just a single statement:
#
# <% benchmark "Process data files", :level => :info, :silence => true do %>
# <%= expensive_and_chatty_files_operation %>
# <% end %>
def benchmark(message = "Benchmarking", options = {})
if logger
if options.is_a?(Symbol)
ActiveSupport::Deprecation.warn("use benchmark('#{message}', :level => :#{options}) instead", caller)
options = { :level => options, :silence => false }
else
options.assert_valid_keys(:level, :silence)
options[:level] ||= :info
end
result = nil
ms = Benchmark.ms { result = options[:silence] ? logger.silence { yield } : yield }
logger.send(options[:level], '%s (%.1fms)' % [ message, ms ])
result
else
yield
end
end
# Silence the logger during the execution of the block.
#
def silence
old_logger_level, logger.level = logger.level, ::Logger::ERROR if logger
yield
ensure
logger.level = old_logger_level if logger
end
end
end
|