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<h1 id="label-Flat+Profiles">Flat Profiles<span><a href="#label-Flat+Profiles">¶</a> <a href="#top">↑</a></span></h1>
<p>Flat profiles show the total amount of time spent in each method. As an
example, here is the output from running printers_test.rb.</p>
<p>Measure Mode: wall_time Thread ID: 70355159212340 Fiber ID: 70355171633140
Total: 0.060485 Sort by: self_time</p>
<pre>%self total self wait child calls name
97.07 0.059 0.059 0.000 0.000 1001 Integer#upto
0.92 0.059 0.001 0.000 0.059 1000 Object#is_prime
0.66 0.060 0.000 0.000 0.059 1 Array#select
0.59 0.000 0.000 0.000 0.000 1000 Kernel#rand
0.50 0.001 0.000 0.000 0.000 1 Array#each_index
0.20 0.000 0.000 0.000 0.000 1000 Kernel#respond_to_missing?
0.01 0.000 0.000 0.000 0.000 1 Object#find_largest
0.01 0.060 0.000 0.000 0.060 1 PrintersTest#setup
0.01 0.060 0.000 0.000 0.060 1 Object#find_primes
0.01 0.000 0.000 0.000 0.000 1 Class#new
0.01 0.060 0.000 0.000 0.060 1 Object#run_primes
0.00 0.000 0.000 0.000 0.000 1 Array#first
0.00 0.001 0.000 0.000 0.001 1 Object#make_random_array
0.00 0.000 0.000 0.000 0.000 1 Array#initialize</pre>
<p>All values are in seconds.</p>
<p>The columns are:</p>
<pre>%self - The percentage of time spent in this method, derived from self_time/total_time
total - The time spent in this method and its children.
self - The time spent in this method.
wait - amount of time this method waited for other threads
child - The time spent in this method's children.
calls - The number of times this method was called.
name - The name of the method.</pre>
<p>Methods are sorted based on %self, therefore the methods that execute the
longest are listed first.</p>
<p>For example, wee can see that Integer#upto took the most time, 0.059
seconds. Method Object#is_prime calls this method, so the 0.59 seconds
appear as child time for Object#is_prime.</p>
<p>The interpretation of method names is:</p>
<ul><li>
<p>MyObject#test - An instance method “test” of the class “MyObject”</p>
</li><li>
<p><Object:MyObject>#test - The <> characters indicate a singleton
method on a singleton class.</p>
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