libstdc++-v3/doc/html/ext/pb_ds/hash_random_int_subscript_find_timing_test.html

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   7 <title>Hash Random Int Subscript Find Timing Test</title>
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  12 <h1>Hash-Based Random-Integer <tt><b>operator</b>[]</tt>
  13     FindTiming Test</h1>
  14 <h2><a name="description" id="description">Description</a></h2>
  15 <p>This test inserts a number of values with uniform i.i.d.
  16     integer keys into a container, then performs a series of finds
  17     using <tt><b>operator</b>[]</tt>. It measures the average time
  18     for <tt><b>operator</b>[]</tt> as a function of the number of
  19     values inserted.</p>
  20 <p>(The test was executed with <a href="../../../../testsuite/performance/ext/pb_ds/random_int_subscript_find_timing.cc"><tt>hash_random_int_subscript_find_timing_test</tt></a>
  21     200 200 2100)</p>
  22 <h2><a name="purpose" id="purpose">Purpose</a></h2>
  23 <p>The test checks the effect of different underlying
  24     hash-tables (see <a href="hash_based_containers.html">Design::Hash-Based Containers</a>
  25     ), range-hashing functions, and trigger policies (see <a href="hash_based_containers.html#hash_policies">Design::Hash-Based
  26     Containers::Hash Policies</a> and <a href="hash_based_containers.html#resize_policies">Design::Hash-Based
  27     Containers::Resize Policies</a> ).</p>
  28 <h2><a name="results" id="results">Results</a></h2>
  29 <p>Figures <a href="#NCCG">NCCG</a>, <a href="#NCCM">NCCM</a>,
  30     and <a href="#NCCL">NCCL</a> show the results for the native
  31     and collision-chaining 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
  32     <a href="assoc_performance_tests.html#local"><u>local</u></a>,
  33     respectively; Figures <a href="#NGPG">NGPG</a>, <a href="#NGPM">NGPM</a>, and <a href="#NGPL">NGPL</a> show the results
  34     for the native and probing 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
  35     <a href="assoc_performance_tests.html#local"><u>local</u></a>,
  36     respectively.</p>
  37 <div id="NCCG_res_div">
  38 <div id="NCCG_gcc">
  39 <div id="NCCG_cc_hash_random_int_subscript_timing_test_find">
  40 <div id="NCCG_assoc">
  41 <div id="NCCG_Native_and_collision-chaining_hash_random_int_find_timing_test_using__tt__b_operator_455b__455tt__457"><div style="border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class="c1"><a name="NCCG" id="NCCG"><img src="cc_hash_random_int_subscript_timing_test_find_gcc.png" alt="no image" /></a></h6>NCCG: Native and collision-chaining hash random int find timing test using <tt><b>operator</b></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>
  42 <ol>
  43 <li>
  44 n_hash_map_ncah-
  45 <tt>std::tr1::unordered_map</tt> with <tt>cache_hash_code</tt> = <tt><b>false</b></tt></li>
  46 <li>
  47 cc_hash_mod_prime_nea_lc_1div8_1div1_nsth_map-
  48 <a href="cc_hash_table.html"><tt>cc_hash_table</tt></a>
  49 with <tt>Comb_Hash_Fn</tt> = <a href="direct_mod_range_hashing.html"><tt>direct_mod_range_hashing</tt></a>
  50 , and <tt>Resize_Policy</tt> = <a href="hash_standard_resize_policy.html"><tt>hash_standard_resize_policy</tt></a>
  51  with <tt>Size_Policy</tt> = <a href="hash_prime_size_policy.html"><tt>hash_prime_size_policy</tt></a>
  52 , and <tt>Trigger_Policy</tt> = <a href="hash_load_check_resize_trigger.html"><tt>hash_load_check_resize_trigger</tt></a>
  53  with <i>&alpha;<sub>min</sub></i> = <i>1/8</i> and <i>&alpha;<sub>max</sub></i> = <i>1/1</i></li>
  54 <li>
  55 cc_hash_mod_prime_nea_lc_1div8_1div2_nsth_map-
  56 <a href="cc_hash_table.html"><tt>cc_hash_table</tt></a>
  57 with <tt>Comb_Hash_Fn</tt> = <a href="direct_mod_range_hashing.html"><tt>direct_mod_range_hashing</tt></a>
  58 , and <tt>Resize_Policy</tt> = <a href="hash_standard_resize_policy.html"><tt>hash_standard_resize_policy</tt></a>
  59  with <tt>Size_Policy</tt> = <a href="hash_prime_size_policy.html"><tt>hash_prime_size_policy</tt></a>
  60 , and <tt>Trigger_Policy</tt> = <a href="hash_load_check_resize_trigger.html"><tt>hash_load_check_resize_trigger</tt></a>
  61  with <i>&alpha;<sub>min</sub></i> = <i>1/8</i> and <i>&alpha;<sub>max</sub></i> = <i>1/2</i></li>
  62 <li>
  63 cc_hash_mask_exp_nea_lc_1div8_1div1_nsth_map-
  64 <a href="cc_hash_table.html"><tt>cc_hash_table</tt></a>
  65 with <tt>Comb_Hash_Fn</tt> = <a href="direct_mask_range_hashing.html"><tt>direct_mask_range_hashing</tt></a>
  66 , and <tt>Resize_Policy</tt> = <a href="hash_standard_resize_policy.html"><tt>hash_standard_resize_policy</tt></a>
  67  with <tt>Size_Policy</tt> = <a href="hash_exponential_size_policy.html"><tt>hash_exponential_size_policy</tt></a>
  68 , and <tt>Trigger_Policy</tt> = <a href="hash_load_check_resize_trigger.html"><tt>hash_load_check_resize_trigger</tt></a>
  69  with <i>&alpha;<sub>min</sub></i> = <i>1/8</i> and <i>&alpha;<sub>max</sub></i> = <i>1/1</i></li>
  70 <li>
  71 cc_hash_mask_exp_nea_lc_1div8_1div2_nsth_map-
  72 <a href="cc_hash_table.html"><tt>cc_hash_table</tt></a>
  73 with <tt>Comb_Hash_Fn</tt> = <a href="direct_mask_range_hashing.html"><tt>direct_mask_range_hashing</tt></a>
  74 , and <tt>Resize_Policy</tt> = <a href="hash_standard_resize_policy.html"><tt>hash_standard_resize_policy</tt></a>
  75  with <tt>Size_Policy</tt> = <a href="hash_exponential_size_policy.html"><tt>hash_exponential_size_policy</tt></a>
  76 , and <tt>Trigger_Policy</tt> = <a href="hash_load_check_resize_trigger.html"><tt>hash_load_check_resize_trigger</tt></a>
  77  with <i>&alpha;<sub>min</sub></i> = <i>1/8</i> and <i>&alpha;<sub>max</sub></i> = <i>1/2</i></li>
  78 </ol>
  79 </div><div style="width: 100%; height: 20px"></div></div>
  80 </div>
  81 </div>
  82 </div>
  83 </div>
  84 <div id="NCCM_res_div">
  85 <div id="NCCM_msvc">
  86 <div id="NCCM_cc_hash_random_int_subscript_timing_test_find">
  87 <div id="NCCM_assoc">
  88 <div id="NCCM_Native_and_collision-chaining_hash_random_int_find_timing_test_using__tt__b_operator_455b__455tt__457"><div style="border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class="c1"><a name="NCCM" id="NCCM"><img src="cc_hash_random_int_subscript_timing_test_find_msvc.png" alt="no image" /></a></h6>NCCM: Native and collision-chaining hash random int find timing test using <tt><b>operator</b></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>
  89 <ol>
  90 <li>
  91 cc_hash_mod_prime_nea_lc_1div8_1div1_nsth_map-
  92 <a href="cc_hash_table.html"><tt>cc_hash_table</tt></a>
  93 with <tt>Comb_Hash_Fn</tt> = <a href="direct_mod_range_hashing.html"><tt>direct_mod_range_hashing</tt></a>
  94 , and <tt>Resize_Policy</tt> = <a href="hash_standard_resize_policy.html"><tt>hash_standard_resize_policy</tt></a>
  95  with <tt>Size_Policy</tt> = <a href="hash_prime_size_policy.html"><tt>hash_prime_size_policy</tt></a>
  96 , and <tt>Trigger_Policy</tt> = <a href="hash_load_check_resize_trigger.html"><tt>hash_load_check_resize_trigger</tt></a>
  97  with <i>&alpha;<sub>min</sub></i> = <i>1/8</i> and <i>&alpha;<sub>max</sub></i> = <i>1/1</i></li>
  98 <li>
  99 cc_hash_mod_prime_nea_lc_1div8_1div2_nsth_map-
 100 <a href="cc_hash_table.html"><tt>cc_hash_table</tt></a>
 101 with <tt>Comb_Hash_Fn</tt> = <a href="direct_mod_range_hashing.html"><tt>direct_mod_range_hashing</tt></a>
 102 , and <tt>Resize_Policy</tt> = <a href="hash_standard_resize_policy.html"><tt>hash_standard_resize_policy</tt></a>
 103  with <tt>Size_Policy</tt> = <a href="hash_prime_size_policy.html"><tt>hash_prime_size_policy</tt></a>
 104 , and <tt>Trigger_Policy</tt> = <a href="hash_load_check_resize_trigger.html"><tt>hash_load_check_resize_trigger</tt></a>
 105  with <i>&alpha;<sub>min</sub></i> = <i>1/8</i> and <i>&alpha;<sub>max</sub></i> = <i>1/2</i></li>
 106 <li>
 107 n_hash_map_ncah-
 108 <tt>stdext::hash_map</tt></li>
 109 <li>
 110 cc_hash_mask_exp_nea_lc_1div8_1div1_nsth_map-
 111 <a href="cc_hash_table.html"><tt>cc_hash_table</tt></a>
 112 with <tt>Comb_Hash_Fn</tt> = <a href="direct_mask_range_hashing.html"><tt>direct_mask_range_hashing</tt></a>
 113 , and <tt>Resize_Policy</tt> = <a href="hash_standard_resize_policy.html"><tt>hash_standard_resize_policy</tt></a>
 114  with <tt>Size_Policy</tt> = <a href="hash_exponential_size_policy.html"><tt>hash_exponential_size_policy</tt></a>
 115 , and <tt>Trigger_Policy</tt> = <a href="hash_load_check_resize_trigger.html"><tt>hash_load_check_resize_trigger</tt></a>
 116  with <i>&alpha;<sub>min</sub></i> = <i>1/8</i> and <i>&alpha;<sub>max</sub></i> = <i>1/1</i></li>
 117 <li>
 118 cc_hash_mask_exp_nea_lc_1div8_1div2_nsth_map-
 119 <a href="cc_hash_table.html"><tt>cc_hash_table</tt></a>
 120 with <tt>Comb_Hash_Fn</tt> = <a href="direct_mask_range_hashing.html"><tt>direct_mask_range_hashing</tt></a>
 121 , and <tt>Resize_Policy</tt> = <a href="hash_standard_resize_policy.html"><tt>hash_standard_resize_policy</tt></a>
 122  with <tt>Size_Policy</tt> = <a href="hash_exponential_size_policy.html"><tt>hash_exponential_size_policy</tt></a>
 123 , and <tt>Trigger_Policy</tt> = <a href="hash_load_check_resize_trigger.html"><tt>hash_load_check_resize_trigger</tt></a>
 124  with <i>&alpha;<sub>min</sub></i> = <i>1/8</i> and <i>&alpha;<sub>max</sub></i> = <i>1/2</i></li>
 125 </ol>
 126 </div><div style="width: 100%; height: 20px"></div></div>
 127 </div>
 128 </div>
 129 </div>
 130 </div>
 131 <div id="NCCL_res_div">
 132 <div id="NCCL_local">
 133 <div id="NCCL_cc_hash_random_int_subscript_timing_test_find">
 134 <div id="NCCL_assoc">
 135 <div id="NCCL_Native_and_collision-chaining_hash_random_int_find_timing_test_using__tt__b_operator_455b__455tt__457"><div style = "border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class="c1"><a name="NCCL" id= "NCCL"><img src="cc_hash_random_int_subscript_timing_test_find_local.png" alt="no image" /></a></h6>NCCL: Native and collision-chaining hash random int find timing test using <tt><b>operator</b></tt>[] - <a href = "assoc_performance_tests.html#local">local</a></div><div style = "width: 100%; height: 20px"></div></div>
 136 </div>
 137 </div>
 138 </div>
 139 </div>
 140 <div id="NGPG_res_div">
 141 <div id="NGPG_gcc">
 142 <div id="NGPG_gp_hash_random_int_subscript_timing_test_find">
 143 <div id="NGPG_assoc">
 144 <div id="NGPG_Native_and_probing_hash_random_int_find_timing_test_using__tt__b_operator_455b__455tt__457"><div style="border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class="c1"><a name="NGPG" id="NGPG"><img src="gp_hash_random_int_subscript_timing_test_find_gcc.png" alt="no image" /></a></h6>NGPG: Native and probing hash random int find timing test using <tt><b>operator</b></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>
 145 <ol>
 146 <li>
 147 n_hash_map_ncah-
 148 <tt>std::tr1::unordered_map</tt> with <tt>cache_hash_code</tt> = <tt><b>false</b></tt></li>
 149 <li>
 150 gp_hash_mod_quadp_prime_nea_lc_1div8_1div2_nsth_map-
 151 <a href="gp_hash_table.html"><tt>gp_hash_table</tt></a>
 152  with <tt>Comb_Hash_Fn</tt> = <a href="direct_mod_range_hashing.html"><tt>direct_mod_range_hashing</tt></a>
 153 , <tt>Resize_Policy</tt> = <a href="hash_standard_resize_policy.html"><tt>hash_standard_resize_policy</tt></a>
 154  with <tt>Size_Policy</tt> = <a href="hash_prime_size_policy.html"><tt>hash_prime_size_policy</tt></a>
 155 , and <tt>Trigger_Policy</tt> = <a href="hash_load_check_resize_trigger.html"><tt>hash_load_check_resize_trigger</tt></a>
 156  with <i>&alpha;<sub>min</sub></i> = <i>1/8</i> and <i>&alpha;<sub>max</sub></i> = <i>1/2</i>, and <tt>Probe_Fn</tt> = <a href="quadratic_probe_fn.html"><tt>quadratic_probe_fn</tt></a>
 157 </li>
 158 <li>
 159 gp_hash_mask_linp_exp_nea_lc_1div8_1div2_nsth_map-
 160 <a href="gp_hash_table.html"><tt>gp_hash_table</tt></a>
 161  with <tt>Comb_Hash_Fn</tt> = <a href="direct_mask_range_hashing.html"><tt>direct_mask_range_hashing</tt></a>
 162 , <tt>Resize_Policy</tt> = <a href="hash_standard_resize_policy.html"><tt>hash_standard_resize_policy</tt></a>
 163  with <tt>Size_Policy</tt> = <a href="hash_exponential_size_policy.html"><tt>hash_exponential_size_policy</tt></a>
 164 , and <tt>Trigger_Policy</tt> = <a href="hash_load_check_resize_trigger.html"><tt>hash_load_check_resize_trigger</tt></a>
 165  with <i>&alpha;<sub>min</sub></i> = <i>1/8</i> and <i>&alpha;<sub>max</sub></i> = <i>1/2</i>, and <tt>Probe_Fn</tt> = <a href="linear_probe_fn.html"><tt>linear_probe_fn</tt></a>
 166 </li>
 167 </ol>
 168 </div><div style="width: 100%; height: 20px"></div></div>
 169 </div>
 170 </div>
 171 </div>
 172 </div>
 173 <div id="NGPM_res_div">
 174 <div id="NGPM_msvc">
 175 <div id="NGPM_gp_hash_random_int_subscript_timing_test_find">
 176 <div id="NGPM_assoc">
 177 <div id="NGPM_Native_and_probing_hash_random_int_find_timing_test_using__tt__b_operator_455b__455tt__457"><div style="border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class="c1"><a name="NGPM" id="NGPM"><img src="gp_hash_random_int_subscript_timing_test_find_msvc.png" alt="no image" /></a></h6>NGPM: Native and probing hash random int find timing test using <tt><b>operator</b></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>
 178 <ol>
 179 <li>
 180 gp_hash_mod_quadp_prime_nea_lc_1div8_1div2_nsth_map-
 181 <a href="gp_hash_table.html"><tt>gp_hash_table</tt></a>
 182  with <tt>Comb_Hash_Fn</tt> = <a href="direct_mod_range_hashing.html"><tt>direct_mod_range_hashing</tt></a>
 183 , <tt>Resize_Policy</tt> = <a href="hash_standard_resize_policy.html"><tt>hash_standard_resize_policy</tt></a>
 184  with <tt>Size_Policy</tt> = <a href="hash_prime_size_policy.html"><tt>hash_prime_size_policy</tt></a>
 185 , and <tt>Trigger_Policy</tt> = <a href="hash_load_check_resize_trigger.html"><tt>hash_load_check_resize_trigger</tt></a>
 186  with <i>&alpha;<sub>min</sub></i> = <i>1/8</i> and <i>&alpha;<sub>max</sub></i> = <i>1/2</i>, and <tt>Probe_Fn</tt> = <a href="quadratic_probe_fn.html"><tt>quadratic_probe_fn</tt></a>
 187 </li>
 188 <li>
 189 n_hash_map_ncah-
 190 <tt>stdext::hash_map</tt></li>
 191 <li>
 192 gp_hash_mask_linp_exp_nea_lc_1div8_1div2_nsth_map-
 193 <a href="gp_hash_table.html"><tt>gp_hash_table</tt></a>
 194  with <tt>Comb_Hash_Fn</tt> = <a href="direct_mask_range_hashing.html"><tt>direct_mask_range_hashing</tt></a>
 195 , <tt>Resize_Policy</tt> = <a href="hash_standard_resize_policy.html"><tt>hash_standard_resize_policy</tt></a>
 196  with <tt>Size_Policy</tt> = <a href="hash_exponential_size_policy.html"><tt>hash_exponential_size_policy</tt></a>
 197 , and <tt>Trigger_Policy</tt> = <a href="hash_load_check_resize_trigger.html"><tt>hash_load_check_resize_trigger</tt></a>
 198  with <i>&alpha;<sub>min</sub></i> = <i>1/8</i> and <i>&alpha;<sub>max</sub></i> = <i>1/2</i>, and <tt>Probe_Fn</tt> = <a href="linear_probe_fn.html"><tt>linear_probe_fn</tt></a>
 199 </li>
 200 </ol>
 201 </div><div style="width: 100%; height: 20px"></div></div>
 202 </div>
 203 </div>
 204 </div>
 205 </div>
 206 <div id="NGPL_res_div">
 207 <div id="NGPL_local">
 208 <div id="NGPL_gp_hash_random_int_subscript_timing_test_find">
 209 <div id="NGPL_assoc">
 210 <div id="NGPL_Native_and_probing_hash_random_int_find_timing_test_using__tt__b_operator_455b__455tt__457"><div style = "border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class="c1"><a name="NGPL" id= "NGPL"><img src="gp_hash_random_int_subscript_timing_test_find_local.png" alt="no image" /></a></h6>NGPL: Native and probing hash random int find timing test using <tt><b>operator</b></tt>[] - <a href = "assoc_performance_tests.html#local">local</a></div><div style = "width: 100%; height: 20px"></div></div>
 211 </div>
 212 </div>
 213 </div>
 214 </div>
 215 <h2><a name="observations" id="observations">Observations</a></h2>
 216 <p>This test shows similar results to <a href="hash_random_int_find_find_timing_test.html">Hash-Based
 217     Random-Integer <tt>find</tt> Find Timing Test</a> .</p>
 218 </div>
 219 </body>
 220 </html>