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| <title>Tree Text Locality of Reference Find Timing Test</title> |
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| <h1>Tree-Based Locality-of-Reference Text <tt>find</tt> Find |
| Timing Test</h1> |
| <h2><a name="description" id="description">Description</a></h2> |
| <p>This test inserts a number of values with keys from an |
| arbitrary text ([ <a href="references.html#wickland96thirty">wickland96thirty</a> ]) into |
| a container, then performs a series of finds using |
| <tt>find</tt> . It is different than <a href="tree_text_find_find_timing_test.html">Tree-Based and |
| Trie-Based Text <tt>find</tt> Find Timing Test</a> in the |
| sequence of finds it performs: this test performs multiple |
| <tt>find</tt> s on the same key before moving on to the next |
| key. It measures the average time for <tt>find</tt> as a |
| function of the number of values inserted.</p> |
| <p>(The test was executed with <a href="../../../../testsuite/performance/ext/pb_ds/tree_text_lor_find_timing.cc"><tt>tree_text_lor_find_timing_test</tt></a> |
| thirty_years_among_the_dead_preproc.txt 200 200 2100)</p> |
| <h2><a name="purpose" id="purpose">Purpose</a></h2> |
| <p>The test checks the effect of different underlying |
| data structures in a locality-of-reference setting.</p> |
| <h2><a name="results" id="results">Results</a></h2> |
| <p>Figures <a href="#NTG">NTG</a>, <a href="#NTM">NTM</a>, and |
| <a href="#NTL">NTL</a> show the results for the native and |
| <tt>pb_ds</tt> tree-based types in <a href="assoc_performance_tests.html#gcc"><u>g++</u></a>, <a href="assoc_performance_tests.html#msvc"><u>msvc++</u></a> and |
| <a href="assoc_performance_tests.html#local"><u>local</u></a>, |
| respectively.</p> |
| <div id="NTG_res_div"> |
| <div id="NTG_gcc"> |
| <div id="NTG_tree_text_lor_find_timing_test"> |
| <div id="NTG_assoc"> |
| <div id="NTG_Native_and_tree-based_locality-of-reference_text_find_timing_test_using__tt_find_455tt_"><div style="border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class="c1"><a name="NTG" id="NTG"><img src="tree_text_lor_find_timing_test_gcc.png" alt="no image" /></a></h6>NTG: Native and tree-based locality-of-reference text find timing test using <tt>find</tt> - <a href="assoc_performance_tests.html#gcc">g++</a><p>In the above figure, the names in the legends have the following meaning:</p> |
| <ol> |
| <li> |
| ov_tree_map- |
| <a href="tree.html"><tt>tree</tt></a> |
| with <tt>Tag</tt> = <a href="ov_tree_tag.html"><tt>ov_tree_tag</tt></a> |
| , and <tt>Node_Update</tt> = <a href="null_tree_node_update.html"><tt>null_tree_node_update</tt></a> |
| </li> |
| <li> |
| rb_tree_map- |
| <a href="tree.html"><tt>tree</tt></a> |
| with <tt>Tag</tt> = <a href="rb_tree_tag.html"><tt>rb_tree_tag</tt></a> |
| , and <tt>Node_Update</tt> = <a href="null_tree_node_update.html"><tt>null_tree_node_update</tt></a> |
| </li> |
| <li> |
| n_map- |
| <tt>std::map</tt></li> |
| <li> |
| splay_tree_map- |
| <a href="tree.html"><tt>tree</tt></a> |
| with <tt>Tag</tt> = <a href="splay_tree_tag.html"><tt>splay_tree_tag</tt></a> |
| , and <tt>Node_Update</tt> = <a href="null_tree_node_update.html"><tt>null_tree_node_update</tt></a> |
| </li> |
| </ol> |
| </div><div style="width: 100%; height: 20px"></div></div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div id="NTM_res_div"> |
| <div id="NTM_msvc"> |
| <div id="NTM_tree_text_lor_find_timing_test"> |
| <div id="NTM_assoc"> |
| <div id="NTM_Native_and_tree-based_locality-of-reference_text_find_timing_test_using__tt_find_455tt_"><div style="border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class="c1"><a name="NTM" id="NTM"><img src="tree_text_lor_find_timing_test_msvc.png" alt="no image" /></a></h6>NTM: Native and tree-based locality-of-reference text find timing test using <tt>find</tt> - <a href="assoc_performance_tests.html#msvc">msvc++</a><p>In the above figure, the names in the legends have the following meaning:</p> |
| <ol> |
| <li> |
| ov_tree_map- |
| <a href="tree.html"><tt>tree</tt></a> |
| with <tt>Tag</tt> = <a href="ov_tree_tag.html"><tt>ov_tree_tag</tt></a> |
| , and <tt>Node_Update</tt> = <a href="null_tree_node_update.html"><tt>null_tree_node_update</tt></a> |
| </li> |
| <li> |
| rb_tree_map- |
| <a href="tree.html"><tt>tree</tt></a> |
| with <tt>Tag</tt> = <a href="rb_tree_tag.html"><tt>rb_tree_tag</tt></a> |
| , and <tt>Node_Update</tt> = <a href="null_tree_node_update.html"><tt>null_tree_node_update</tt></a> |
| </li> |
| <li> |
| n_map- |
| <tt>std::map</tt></li> |
| <li> |
| splay_tree_map- |
| <a href="tree.html"><tt>tree</tt></a> |
| with <tt>Tag</tt> = <a href="splay_tree_tag.html"><tt>splay_tree_tag</tt></a> |
| , and <tt>Node_Update</tt> = <a href="null_tree_node_update.html"><tt>null_tree_node_update</tt></a> |
| </li> |
| </ol> |
| </div><div style="width: 100%; height: 20px"></div></div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div id="NTL_res_div"> |
| <div id="NTL_local"> |
| <div id="NTL_tree_text_lor_find_timing_test"> |
| <div id="NTL_assoc"> |
| <div id="NTL_Native_and_tree-based_locality-of-reference_text_find_timing_test_using__tt_find_455tt_"><div style = "border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class="c1"><a name="NTL" id= "NTL"><img src="tree_text_lor_find_timing_test_local.png" alt="no image" /></a></h6>NTL: Native and tree-based locality-of-reference text find timing test using <tt>find</tt> - <a href = "assoc_performance_tests.html#local">local</a></div><div style = "width: 100%; height: 20px"></div></div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <h2><a name="observations" id="observations">Observations</a></h2> |
| <p>For this setting, an ordered-vector tree ( <a href="tree.html"><tt>tree</tt></a> |
| with <tt>Tag =</tt> <a href="ov_tree_tag.html"><tt>ov_tree_tag</tt></a> ), a |
| red-black tree ( <a href="tree.html"><tt>tree</tt></a> |
| with <tt>Tag =</tt> <a href="splay_tree_tag.html"><tt>rb_tree_tag</tt></a> ), and the |
| native red-black tree all share approximately the same |
| performance.</p> |
| <p>A splay tree ( <a href="tree.html"><tt>tree</tt></a> |
| with <tt>Tag =</tt> <a href="splay_tree_tag.html"><tt>splay_tree_tag</tt></a> ) does |
| much better, since each (successful) find "bubbles" the |
| corresponding node to the root of the tree.</p> |
| <p><a href="assoc_performance_tests.html#tree_like_based_types">Observations::Tree-Like-Based |
| Container Types</a> summarizes some observations on tree-based |
| and trie-based containers.</p> |
| </div> |
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