1 <!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Transitional//EN"
2 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
4 <html xmlns=
"http://www.w3.org/1999/xhtml" xml:
lang=
"en" lang=
"en">
6 <meta name=
"generator" content=
"HTML Tidy for Linux/x86 (vers 12 April 2005), see www.w3.org" />
7 <title>Priority Queue Text Push Pop Timing Test
</title>
8 <meta http-equiv=
"Content-Type" content=
"text/html; charset=us-ascii" />
12 <h1>Priority Queue Text
<tt>push
</tt> and
<tt>pop
</tt> Timing
14 <h2><a name=
"description" id=
"description">Description
</a></h2>
15 <p>This test inserts a number of values with keys from an
16 arbitrary text ([
<a href=
"references.html#wickland96thirty">wickland96thirty
</a> ]) into
17 a container using
<tt>push
</tt> , then removes them using
18 <tt>pop
</tt> . It measures the average time for
<tt>push
</tt>
19 as a function of the number of values.
</p>
20 <p>(The test was executed with
<a href=
"../../../../testsuite/performance/ext/pb_ds/priority_queue_text_push_pop_timing.cc"><tt>
21 priority_queue_text_push_pop_timing_test
</tt></a>
22 thirty_years_among_the_dead_preproc.txt
200 200 2100)
</p>
23 <h2><a name=
"purpose" id=
"purpose">Purpose
</a></h2>
24 <p>The test checks the effect of different underlying
25 data structures (see
<a href=
"pq_design.html#pq_imp">Design::Priority
26 Queues::Implementations
</a>).
</p>
27 <h2><a name=
"results" id=
"results">Results
</a></h2>
28 <p>Figures
<a href=
"#NPG">NPG
</a>,
<a href=
"#NPM">NPM
</a>, and
29 <a href=
"#NPL">NPL
</a> show the results for the native priority
30 queues and
<tt>pb_ds
</tt> 's priority queues in
<a href=
"pq_performance_tests.html#gcc"><u>g++
</u></a>,
<a href=
"pq_performance_tests.html#msvc"><u>msvc++
</u></a>, and
31 <a href=
"pq_performance_tests.html#local"><u>local
</u></a>,
32 respectively; Figures
<a href=
"#NBRG">NBRG
</a>,
<a href=
"#NBRM">NBRM
</a>, and
<a href=
"#NBRL">NBRL
</a> show the results
33 for the native priority queues and
<tt>pb_ds
</tt>'s pairing
34 queues in
<a href=
"pq_performance_tests.html#gcc"><u>g++
</u></a>,
<a href=
"pq_performance_tests.html#msvc"><u>msvc++
</u></a>, and
35 <a href=
"pq_performance_tests.html#local"><u>local
</u></a>,
37 <div id=
"NPG_res_div">
39 <div id=
"NPG_priority_queue_text_push_pop_timing_test">
41 <div id=
"NPG_Native_tree_and__tt_pb_ds_455tt__priority_queue__tt_push_455tt__and__tt_pop_455tt__timing_test"><div style=
"border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class=
"c1"><a name=
"NPG" id=
"NPG"><img src=
"priority_queue_text_push_pop_timing_test_gcc.png" alt=
"no image" /></a></h6>NPG: Native tree and
<tt>pb ds
</tt> priority queue
<tt>push
</tt> and
<tt>pop
</tt> timing test -
<a href=
"pq_performance_tests.html#gcc">g++
</a><p>In the above figure, the names in the legends have the following meaning:
</p>
45 <tt>std::priority_queue
</tt> adapting
<tt>std::vector
</tt></li>
48 <tt>std::priority_queue
</tt> adapting
<tt>std::deque
</tt></li>
51 <a href=
"priority_queue.html"><tt>priority_queue
</tt></a>
52 with
<tt>Tag
</tt> =
<a href=
"thin_heap_tag.html"><tt>thin_heap_tag
</tt></a>
56 <a href=
"priority_queue.html"><tt>priority_queue
</tt></a>
57 with
<tt>Tag
</tt> =
<a href=
"rc_binomial_heap_tag.html"><tt>rc_binomial_heap_tag
</tt></a>
61 <a href=
"priority_queue.html"><tt>priority_queue
</tt></a>
62 with
<tt>Tag
</tt> =
<a href=
"binomial_heap_tag.html"><tt>binomial_heap_tag
</tt></a>
66 <a href=
"priority_queue.html"><tt>priority_queue
</tt></a>
67 with
<tt>Tag
</tt> =
<a href=
"binary_heap_tag.html"><tt>binary_heap_tag
</tt></a>
71 <a href=
"priority_queue.html"><tt>priority_queue
</tt></a>
72 with
<tt>Tag
</tt> =
<a href=
"pairing_heap_tag.html"><tt>pairing_heap_tag
</tt></a>
75 </div><div style=
"width: 100%; height: 20px"></div></div>
80 <div id=
"NPM_res_div">
82 <div id=
"NPM_priority_queue_text_push_pop_timing_test">
84 <div id=
"NPM_Native_tree_and__tt_pb_ds_455tt__priority_queue__tt_push_455tt__and__tt_pop_455tt__timing_test"><div style=
"border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class=
"c1"><a name=
"NPM" id=
"NPM"><img src=
"priority_queue_text_push_pop_timing_test_msvc.png" alt=
"no image" /></a></h6>NPM: Native tree and
<tt>pb ds
</tt> priority queue
<tt>push
</tt> and
<tt>pop
</tt> timing test -
<a href=
"pq_performance_tests.html#msvc">msvc++
</a><p>In the above figure, the names in the legends have the following meaning:
</p>
88 <tt>std::priority_queue
</tt> adapting
<tt>std::deque
</tt></li>
91 <tt>std::priority_queue
</tt> adapting
<tt>std::vector
</tt></li>
94 <a href=
"priority_queue.html"><tt>priority_queue
</tt></a>
95 with
<tt>Tag
</tt> =
<a href=
"thin_heap_tag.html"><tt>thin_heap_tag
</tt></a>
99 <a href=
"priority_queue.html"><tt>priority_queue
</tt></a>
100 with
<tt>Tag
</tt> =
<a href=
"rc_binomial_heap_tag.html"><tt>rc_binomial_heap_tag
</tt></a>
104 <a href=
"priority_queue.html"><tt>priority_queue
</tt></a>
105 with
<tt>Tag
</tt> =
<a href=
"binomial_heap_tag.html"><tt>binomial_heap_tag
</tt></a>
109 <a href=
"priority_queue.html"><tt>priority_queue
</tt></a>
110 with
<tt>Tag
</tt> =
<a href=
"pairing_heap_tag.html"><tt>pairing_heap_tag
</tt></a>
114 <a href=
"priority_queue.html"><tt>priority_queue
</tt></a>
115 with
<tt>Tag
</tt> =
<a href=
"binary_heap_tag.html"><tt>binary_heap_tag
</tt></a>
118 </div><div style=
"width: 100%; height: 20px"></div></div>
123 <div id=
"NPL_res_div">
125 <div id=
"NPL_priority_queue_text_push_pop_timing_test">
127 <div id=
"NPL_Native_tree_and__tt_pb_ds_455tt__priority_queue__tt_push_455tt__and__tt_pop_455tt__timing_test"><div style =
"border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class=
"c1"><a name=
"NPL" id=
"NPL"><img src=
"priority_queue_text_push_pop_timing_test_local.png" alt=
"no image" /></a></h6>NPL: Native tree and
<tt>pb ds
</tt> priority queue
<tt>push
</tt> and
<tt>pop
</tt> timing test -
<a href =
"pq_performance_tests.html#local">local
</a></div><div style =
"width: 100%; height: 20px"></div></div>
132 <div id=
"NBRG_res_div">
134 <div id=
"NBRG_pairing_priority_queue_text_push_pop_timing_test">
136 <div id=
"NBRG_Native_tree_and__tt_pb_ds_455tt__pairing_priority_queue__tt_push_455tt__and__tt_pop_455tt__timing_test"><div style=
"border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class=
"c1"><a name=
"NBRG" id=
"NBRG"><img src=
"pairing_priority_queue_text_push_pop_timing_test_gcc.png" alt=
"no image" /></a></h6>NBRG: Native tree and
<tt>pb ds
</tt> pairing priority queue
<tt>push
</tt> and
<tt>pop
</tt> timing test -
<a href=
"pq_performance_tests.html#gcc">g++
</a><p>In the above figure, the names in the legends have the following meaning:
</p>
140 <tt>std::priority_queue
</tt> adapting
<tt>std::vector
</tt></li>
143 <tt>std::priority_queue
</tt> adapting
<tt>std::deque
</tt></li>
146 <a href=
"priority_queue.html"><tt>priority_queue
</tt></a>
147 with
<tt>Tag
</tt> =
<a href=
"pairing_heap_tag.html"><tt>pairing_heap_tag
</tt></a>
150 </div><div style=
"width: 100%; height: 20px"></div></div>
155 <div id=
"NBRM_res_div">
157 <div id=
"NBRM_pairing_priority_queue_text_push_pop_timing_test">
159 <div id=
"NBRM_Native_tree_and__tt_pb_ds_455tt__pairing_priority_queue__tt_push_455tt__and__tt_pop_455tt__timing_test"><div style=
"border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class=
"c1"><a name=
"NBRM" id=
"NBRM"><img src=
"pairing_priority_queue_text_push_pop_timing_test_msvc.png" alt=
"no image" /></a></h6>NBRM: Native tree and
<tt>pb ds
</tt> pairing priority queue
<tt>push
</tt> and
<tt>pop
</tt> timing test -
<a href=
"pq_performance_tests.html#msvc">msvc++
</a><p>In the above figure, the names in the legends have the following meaning:
</p>
163 <tt>std::priority_queue
</tt> adapting
<tt>std::deque
</tt></li>
166 <tt>std::priority_queue
</tt> adapting
<tt>std::vector
</tt></li>
169 <a href=
"priority_queue.html"><tt>priority_queue
</tt></a>
170 with
<tt>Tag
</tt> =
<a href=
"pairing_heap_tag.html"><tt>pairing_heap_tag
</tt></a>
173 </div><div style=
"width: 100%; height: 20px"></div></div>
178 <div id=
"NBRL_res_div">
179 <div id=
"NBRL_local">
180 <div id=
"NBRL_pairing_priority_queue_text_push_pop_timing_test">
182 <div id=
"NBRL_Native_tree_and__tt_pb_ds_455tt__pairing_priority_queue__tt_push_455tt__and__tt_pop_455tt__timing_test"><div style =
"border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class=
"c1"><a name=
"NBRL" id=
"NBRL"><img src=
"pairing_priority_queue_text_push_pop_timing_test_local.png" alt=
"no image" /></a></h6>NBRL: Native tree and
<tt>pb ds
</tt> pairing priority queue
<tt>push
</tt> and
<tt>pop
</tt> timing test -
<a href =
"pq_performance_tests.html#local">local
</a></div><div style =
"width: 100%; height: 20px"></div></div>
187 <h2><a name=
"observations" id=
"observations">Observations
</a></h2>
188 <p>These results are very similar to
<a href=
"priority_queue_text_push_timing_test.html">Priority Queue Text
189 <tt>push
</tt> Timing Test
</a>. As stated there, pairing heaps
190 (
<a href=
"priority_queue.html"><tt>priority_queue
</tt></a> with
191 <tt>Tag
</tt> =
<a href=
"pairing_heap_tag.html"><tt>pairing_heap_tag
</tt></a>)
192 are most suited for
<tt>push
</tt> and
<tt>pop
</tt> sequences of
193 non-primitive types such as strings. Observing these two tests,
194 one can note that a pairing heap outperforms the others in
195 terms of
<tt>push
</tt> operations, but equals binary heaps
196 (
<a href=
"priority_queue.html"><tt>priority_queue
</tt></a> with
197 <tt>Tag
</tt> =
<a href=
"binary_heap_tag.html"><tt>binary_heap_tag
</tt></a>) if
198 the number of
<tt>push
</tt> and
<tt>pop
</tt> operations is
199 equal. As the number of
<tt>pop
</tt> operations is at most
200 equal to the number of
<tt>push
</tt> operations, pairing heaps
201 are better in this case. See
<a href=
"priority_queue_random_int_push_pop_timing_test.html">Priority
202 Queue Random Integer
<tt>push
</tt> and
<tt>pop
</tt> Timing
203 Test
</a> for a case which is different.
</p>
204 <p><a href=
"pq_performance_tests.html#pq_observations">Priority-Queue
205 Performance Tests::Observations
</a> discusses this further and