Ruby探查器結果解釋

我正在使用ruby-prof gem來剖析我的代碼。Ruby探查器結果解釋

和結果如下：

%self  total  self  wait child calls name 
50.56  31.06 23.45  0.00  7.62 234593 Array#each 
14.29  6.62  6.62  0.00  0.00 562480 Array#- 
13.63  6.32  6.32  0.00  0.00 157816 Array#| 
11.20  5.20  5.20  0.00  0.00 6210903 Hash#default 
    2.44  46.36  1.13  0.00 46.36 78909 Analyzer#process 
    2.02  46.36  0.94  0.00 46.36 78908 Analyzer#try 
    1.70  0.79  0.79  0.00  0.00 562481 UnboundMethod#bind 
    1.53  7.34  0.71  0.00  6.62 562480 Method#call 
    1.18  0.55  0.55  0.00  0.00 562480 Kernel#instance_variable_defined? 
    0.76  46.36  0.35  0.00 46.36  6250 Array#combination 
    0.37  0.17  0.17  0.00  0.00 105763 Array#concat 
    0.25  25.19  0.12  0.00 25.07 77842 Enumerable#group_by 
    0.02  46.36  0.01  0.00 46.36  3125 Enumerator#each 
    0.02  0.01  0.01  0.00  0.00 78908 Array#empty? 
...

我敢肯定，我的代碼不會嘗試訪問一些Hash ES的不存在的鍵。問題是 - 什麼Hash#default可能意味着什麼？

這裏是一段代碼：

class Analyzer 

    def process(level, hypo_right, hypo_wrong) 
    if portion = @portions[level] 
     selections = @selections[level] - hypo_wrong 
     master_size = selections.size 
     selections -= hypo_right 
     new_portion = portion + selections.size - master_size 
     if new_portion > selections.size || new_portion < 0 
     return 
     elsif new_portion == 0 
     try(level, hypo_right, [], hypo_wrong, selections) 
     else 
     selections.combination(new_portion).each do |hypo_right2| 
      try(level, hypo_right, hypo_right2, hypo_wrong, (selections - hypo_right2)) 
     end 
     end 
    else 
     puts hypo_right.inspect 
    end 
    end 

    def try(level, right, right2, wrong, wrong2) 
    local_right = right | right2 
    local_wrong = wrong | wrong2 
    right2.each { |r| local_wrong.concat(@siblings[r]) } 

    unless wrong2.empty? 
     grouped_wrong = local_wrong.group_by{|e| @vars[e] } 
     wrong2.each do |w| 
     qid = @vars[w] 
     if grouped_wrong[qid].size == @limits[qid] 
      local_right << (@q_hash[qid] - grouped_wrong[qid])[0] 
     end 
     end 
    end 
    process(level + 1, local_right, local_wrong) 
    end 

    def start 
    process(0, [], []) 
    end 
end

@selections，@portions是Array S; @q_hash，@siblings，@limits和@vars是Hash es。

來源

2011-12-05 taro

很難說W/O源足以重現行爲。 –

你使用的只是紅寶石 - 或者你真的使用rails嗎？ –

Taryn East，這不是一個欄杆代碼。 – taro

由於痞子，找到答案：

require 'ruby-prof' 
h = (0..9).inject({}) {|h, x| h[x] = (x+97).chr;h } 
a = (0..1000000).collect { rand(100) } 
RubyProf.start 
g = a.group_by {|x| h[x/10] } 
RubyProf::FlatPrinter.new(RubyProf.stop).print(STDOUT) 


Thread ID: 17188993880 
Total: 1.210938 

%self  total  self  wait child calls name 
100.00  1.21  1.21  0.00  0.00  1 Array#each 
    0.00  0.00  0.00  0.00  0.00  10 Hash#default 
    0.00  1.21  0.00  0.00  1.21  1 Enumerable#group_by 
    0.00  1.21  0.00  0.00  1.21  1 Object#irb_binding

來源

2011-12-05 18:05:25 taro

Ruby探查器結果解釋

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