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   <h1>Source code for apache_beam.tools.coders_microbenchmark</h1><div class="highlight"><pre>
 <span></span><span class="c1"># Licensed to the Apache Software Foundation (ASF) under one or more</span>
 <span class="c1"># contributor license agreements.  See the NOTICE file distributed with</span>
 <span class="c1"># this work for additional information regarding copyright ownership.</span>
 <span class="c1"># The ASF licenses this file to You under the Apache License, Version 2.0</span>
 <span class="c1"># (the &quot;License&quot;); you may not use this file except in compliance with</span>
 <span class="c1"># the License.  You may obtain a copy of the License at</span>
 <span class="c1">#</span>
 <span class="c1">#    http://www.apache.org/licenses/LICENSE-2.0</span>
 <span class="c1">#</span>
 <span class="c1"># Unless required by applicable law or agreed to in writing, software</span>
 <span class="c1"># distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span>
 <span class="c1"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
 <span class="c1"># See the License for the specific language governing permissions and</span>
 <span class="c1"># limitations under the License.</span>
 <span class="c1">#</span>
 <span class="sd">&quot;&quot;&quot;A microbenchmark for measuring performance of coders.</span>

 <span class="sd">This runs a sequence of encode-decode operations on random inputs</span>
 <span class="sd">to collect performance of various coders.</span>

 <span class="sd">To evaluate coders performance we approximate the behavior</span>
 <span class="sd">how the coders are used in PCollections: we encode and decode</span>
 <span class="sd">a list of elements. An element can be a string, a list of integers,</span>
 <span class="sd">a windowed value, or any other object we want a coder to process.</span>

 <span class="sd">Run as:</span>
 <span class="sd">  python -m apache_beam.tools.coders_microbenchmark</span>

 <span class="sd">&quot;&quot;&quot;</span>

 <span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">absolute_import</span>
 <span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">print_function</span>

 <span class="kn">import</span> <span class="nn">random</span>
 <span class="kn">import</span> <span class="nn">string</span>
 <span class="kn">import</span> <span class="nn">sys</span>

 <span class="kn">from</span> <span class="nn">past.builtins</span> <span class="k">import</span> <span class="n">unicode</span>

 <span class="kn">from</span> <span class="nn">apache_beam.coders</span> <span class="k">import</span> <span class="n">coders</span>
 <span class="kn">from</span> <span class="nn">apache_beam.tools</span> <span class="k">import</span> <span class="n">utils</span>
 <span class="kn">from</span> <span class="nn">apache_beam.transforms</span> <span class="k">import</span> <span class="n">window</span>
 <span class="kn">from</span> <span class="nn">apache_beam.utils</span> <span class="k">import</span> <span class="n">windowed_value</span>


 <div class="viewcode-block" id="coder_benchmark_factory"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.coder_benchmark_factory">[docs]</a><span class="k">def</span> <span class="nf">coder_benchmark_factory</span><span class="p">(</span><span class="n">coder</span><span class="p">,</span> <span class="n">generate_fn</span><span class="p">):</span>
   <span class="sd">&quot;&quot;&quot;Creates a benchmark that encodes and decodes a list of elements.</span>

 <span class="sd">  Args:</span>
 <span class="sd">    coder: coder to use to encode an element.</span>
 <span class="sd">    generate_fn: a callable that generates an element.</span>
 <span class="sd">  &quot;&quot;&quot;</span>

   <span class="k">class</span> <span class="nc">CoderBenchmark</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
     <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">num_elements_per_benchmark</span><span class="p">):</span>
       <span class="bp">self</span><span class="o">.</span><span class="n">_coder</span> <span class="o">=</span> <span class="n">coders</span><span class="o">.</span><span class="n">IterableCoder</span><span class="p">(</span><span class="n">coder</span><span class="p">)</span>
       <span class="bp">self</span><span class="o">.</span><span class="n">_list</span> <span class="o">=</span> <span class="p">[</span><span class="n">generate_fn</span><span class="p">()</span>
                     <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">num_elements_per_benchmark</span><span class="p">)]</span>

     <span class="k">def</span> <span class="nf">__call__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
       <span class="c1"># Calling coder operations on a single element at a time may incur</span>
       <span class="c1"># unrelevant overhead. To compensate, we use a list elements.</span>
       <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_coder</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_coder</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_list</span><span class="p">))</span>

   <span class="n">CoderBenchmark</span><span class="o">.</span><span class="vm">__name__</span> <span class="o">=</span> <span class="s2">&quot;</span><span class="si">%s</span><span class="s2">, </span><span class="si">%s</span><span class="s2">&quot;</span> <span class="o">%</span> <span class="p">(</span>
       <span class="n">generate_fn</span><span class="o">.</span><span class="vm">__name__</span><span class="p">,</span> <span class="nb">str</span><span class="p">(</span><span class="n">coder</span><span class="p">))</span>

   <span class="k">return</span> <span class="n">CoderBenchmark</span></div>


 <div class="viewcode-block" id="small_int"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.small_int">[docs]</a><span class="k">def</span> <span class="nf">small_int</span><span class="p">():</span>
   <span class="k">return</span> <span class="n">random</span><span class="o">.</span><span class="n">randint</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">127</span><span class="p">)</span></div>


 <div class="viewcode-block" id="large_int"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.large_int">[docs]</a><span class="k">def</span> <span class="nf">large_int</span><span class="p">():</span>
   <span class="k">return</span> <span class="n">random</span><span class="o">.</span><span class="n">randint</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">maxsize</span> <span class="o">&gt;&gt;</span> <span class="mi">2</span><span class="p">,</span> <span class="n">sys</span><span class="o">.</span><span class="n">maxsize</span><span class="p">)</span></div>


 <div class="viewcode-block" id="random_string"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.random_string">[docs]</a><span class="k">def</span> <span class="nf">random_string</span><span class="p">(</span><span class="n">length</span><span class="p">):</span>
   <span class="k">return</span> <span class="n">unicode</span><span class="p">(</span><span class="s1">&#39;&#39;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">random</span><span class="o">.</span><span class="n">choice</span><span class="p">(</span>
       <span class="n">string</span><span class="o">.</span><span class="n">ascii_letters</span> <span class="o">+</span> <span class="n">string</span><span class="o">.</span><span class="n">digits</span><span class="p">)</span> <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">length</span><span class="p">)))</span></div>


 <div class="viewcode-block" id="small_string"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.small_string">[docs]</a><span class="k">def</span> <span class="nf">small_string</span><span class="p">():</span>
   <span class="k">return</span> <span class="n">random_string</span><span class="p">(</span><span class="mi">4</span><span class="p">)</span></div>


 <div class="viewcode-block" id="large_string"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.large_string">[docs]</a><span class="k">def</span> <span class="nf">large_string</span><span class="p">():</span>
   <span class="k">return</span> <span class="n">random_string</span><span class="p">(</span><span class="mi">100</span><span class="p">)</span></div>


 <div class="viewcode-block" id="list_int"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.list_int">[docs]</a><span class="k">def</span> <span class="nf">list_int</span><span class="p">(</span><span class="n">size</span><span class="p">):</span>
   <span class="k">return</span> <span class="p">[</span><span class="n">small_int</span><span class="p">()</span> <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">size</span><span class="p">)]</span></div>


 <div class="viewcode-block" id="dict_int_int"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.dict_int_int">[docs]</a><span class="k">def</span> <span class="nf">dict_int_int</span><span class="p">(</span><span class="n">size</span><span class="p">):</span>
   <span class="k">return</span> <span class="p">{</span><span class="n">i</span><span class="p">:</span> <span class="n">i</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">list_int</span><span class="p">(</span><span class="n">size</span><span class="p">)}</span></div>


 <div class="viewcode-block" id="small_list"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.small_list">[docs]</a><span class="k">def</span> <span class="nf">small_list</span><span class="p">():</span>
   <span class="k">return</span> <span class="n">list_int</span><span class="p">(</span><span class="mi">10</span><span class="p">)</span></div>


 <div class="viewcode-block" id="large_list"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.large_list">[docs]</a><span class="k">def</span> <span class="nf">large_list</span><span class="p">():</span>
   <span class="k">return</span> <span class="n">list_int</span><span class="p">(</span><span class="mi">1000</span><span class="p">)</span></div>


 <div class="viewcode-block" id="small_tuple"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.small_tuple">[docs]</a><span class="k">def</span> <span class="nf">small_tuple</span><span class="p">():</span>
   <span class="c1"># Benchmark a common case of 2-element tuples.</span>
   <span class="k">return</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">list_int</span><span class="p">(</span><span class="mi">2</span><span class="p">))</span></div>


 <div class="viewcode-block" id="large_tuple"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.large_tuple">[docs]</a><span class="k">def</span> <span class="nf">large_tuple</span><span class="p">():</span>
   <span class="k">return</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">large_list</span><span class="p">())</span></div>


 <div class="viewcode-block" id="small_dict"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.small_dict">[docs]</a><span class="k">def</span> <span class="nf">small_dict</span><span class="p">():</span>
   <span class="k">return</span> <span class="p">{</span><span class="n">i</span><span class="p">:</span> <span class="n">i</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">small_list</span><span class="p">()}</span></div>


 <div class="viewcode-block" id="large_dict"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.large_dict">[docs]</a><span class="k">def</span> <span class="nf">large_dict</span><span class="p">():</span>
   <span class="k">return</span> <span class="p">{</span><span class="n">i</span><span class="p">:</span> <span class="n">i</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">large_list</span><span class="p">()}</span></div>


 <div class="viewcode-block" id="random_windowed_value"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.random_windowed_value">[docs]</a><span class="k">def</span> <span class="nf">random_windowed_value</span><span class="p">(</span><span class="n">num_windows</span><span class="p">):</span>
   <span class="k">return</span> <span class="n">windowed_value</span><span class="o">.</span><span class="n">WindowedValue</span><span class="p">(</span>
       <span class="n">value</span><span class="o">=</span><span class="n">small_int</span><span class="p">(),</span>
       <span class="n">timestamp</span><span class="o">=</span><span class="mi">12345678</span><span class="p">,</span>
       <span class="n">windows</span><span class="o">=</span><span class="nb">tuple</span><span class="p">(</span>
           <span class="n">window</span><span class="o">.</span><span class="n">IntervalWindow</span><span class="p">(</span><span class="n">i</span> <span class="o">*</span> <span class="mi">10</span><span class="p">,</span> <span class="n">i</span> <span class="o">*</span> <span class="mi">10</span> <span class="o">+</span> <span class="n">small_int</span><span class="p">())</span>
           <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">num_windows</span><span class="p">)</span>
       <span class="p">))</span></div>


 <div class="viewcode-block" id="wv_with_one_window"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.wv_with_one_window">[docs]</a><span class="k">def</span> <span class="nf">wv_with_one_window</span><span class="p">():</span>
   <span class="k">return</span> <span class="n">random_windowed_value</span><span class="p">(</span><span class="n">num_windows</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span></div>


 <div class="viewcode-block" id="wv_with_multiple_windows"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.wv_with_multiple_windows">[docs]</a><span class="k">def</span> <span class="nf">wv_with_multiple_windows</span><span class="p">():</span>
   <span class="k">return</span> <span class="n">random_windowed_value</span><span class="p">(</span><span class="n">num_windows</span><span class="o">=</span><span class="mi">32</span><span class="p">)</span></div>


 <div class="viewcode-block" id="run_coder_benchmarks"><a class="viewcode-back" href="../../../apache_beam.tools.coders_microbenchmark.html#apache_beam.tools.coders_microbenchmark.run_coder_benchmarks">[docs]</a><span class="k">def</span> <span class="nf">run_coder_benchmarks</span><span class="p">(</span><span class="n">num_runs</span><span class="p">,</span> <span class="n">input_size</span><span class="p">,</span> <span class="n">seed</span><span class="p">,</span> <span class="n">verbose</span><span class="p">):</span>
   <span class="n">random</span><span class="o">.</span><span class="n">seed</span><span class="p">(</span><span class="n">seed</span><span class="p">)</span>

   <span class="c1"># TODO(BEAM-4441): Pick coders using type hints, for example:</span>
   <span class="c1"># tuple_coder = typecoders.registry.get_coder(typehints.Tuple[int, ...])</span>
   <span class="n">benchmarks</span> <span class="o">=</span> <span class="p">[</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">(),</span> <span class="n">small_int</span><span class="p">),</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">(),</span> <span class="n">large_int</span><span class="p">),</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">(),</span> <span class="n">small_string</span><span class="p">),</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">(),</span> <span class="n">large_string</span><span class="p">),</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">(),</span>
           <span class="n">small_list</span><span class="p">),</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">IterableCoder</span><span class="p">(</span><span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">()),</span>
           <span class="n">small_list</span><span class="p">),</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">(),</span>
           <span class="n">large_list</span><span class="p">),</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">IterableCoder</span><span class="p">(</span><span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">()),</span>
           <span class="n">large_list</span><span class="p">),</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">(),</span>
           <span class="n">small_tuple</span><span class="p">),</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">(),</span>
           <span class="n">large_tuple</span><span class="p">),</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">(),</span>
           <span class="n">small_dict</span><span class="p">),</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">(),</span>
           <span class="n">large_dict</span><span class="p">),</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">WindowedValueCoder</span><span class="p">(</span><span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">()),</span>
           <span class="n">wv_with_one_window</span><span class="p">),</span>
       <span class="n">coder_benchmark_factory</span><span class="p">(</span>
           <span class="n">coders</span><span class="o">.</span><span class="n">WindowedValueCoder</span><span class="p">(</span><span class="n">coders</span><span class="o">.</span><span class="n">FastPrimitivesCoder</span><span class="p">()),</span>
           <span class="n">wv_with_multiple_windows</span><span class="p">),</span>
   <span class="p">]</span>

   <span class="n">suite</span> <span class="o">=</span> <span class="p">[</span><span class="n">utils</span><span class="o">.</span><span class="n">BenchmarkConfig</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">input_size</span><span class="p">,</span> <span class="n">num_runs</span><span class="p">)</span> <span class="k">for</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">benchmarks</span><span class="p">]</span>
   <span class="n">utils</span><span class="o">.</span><span class="n">run_benchmarks</span><span class="p">(</span><span class="n">suite</span><span class="p">,</span> <span class="n">verbose</span><span class="o">=</span><span class="n">verbose</span><span class="p">)</span></div>


 <span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s2">&quot;__main__&quot;</span><span class="p">:</span>
   <span class="n">utils</span><span class="o">.</span><span class="n">check_compiled</span><span class="p">(</span><span class="s2">&quot;apache_beam.coders.coder_impl&quot;</span><span class="p">)</span>

   <span class="n">num_runs</span> <span class="o">=</span> <span class="mi">20</span>
   <span class="n">num_elements_per_benchmark</span> <span class="o">=</span> <span class="mi">1000</span>
   <span class="n">seed</span> <span class="o">=</span> <span class="mi">42</span>  <span class="c1"># Fix the seed for better consistency</span>

   <span class="n">run_coder_benchmarks</span><span class="p">(</span><span class="n">num_runs</span><span class="p">,</span> <span class="n">num_elements_per_benchmark</span><span class="p">,</span> <span class="n">seed</span><span class="p">,</span>
                        <span class="n">verbose</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
 </pre></div>

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