gcc/libstdc++-v3/doc/html/ext/pb_ds/priority_queue_text_modify_down_timing_test.html - Issue 3050029: [gcc] GCC 4.5.0=>4.5.1

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Issue 3050029: [gcc] GCC 4.5.0=>4.5.1 (Closed) Base URL: ssh://git@gitrw.chromium.org:9222/nacl-toolchain.git

Patch Set: Created 10 years, 5 months ago

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diff --git a/gcc/libstdc++-v3/doc/html/ext/pb_ds/priority_queue_text_modify_down_timing_test.html b/gcc/libstdc++-v3/doc/html/ext/pb_ds/priority_queue_text_modify_down_timing_test.html

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-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

- "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

-<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

-<head>

-<meta name="generator" content="HTML Tidy for Linux/x86 (vers 12 April 2005), see www.w3.org" />

-<title>Priority Queue Text Modify (Down) Timing Test</title>

-<meta http-equiv="Content-Type" content="text/html; charset=us-ascii" />

-</head>

-<body>

-<div id="page">

-<h1>Priority Queue Text <tt>modify</tt> Timing Test - II</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

- into a container then modifies each one "down" (<i>i.e.,</i> it

- makes it smaller). It uses <tt>modify</tt> for <tt>pb_ds</tt>'s

- priority queues; for the STL's priority queues, it pops values

- from a container until it reaches the value that should be

- modified, then pushes values back in. It measures the average

- time for <tt>modify</tt> as a function of the number of

- values.</p>

-<p>(The test was executed with <a href="http://gcc.gnu.org/viewcvs/*checkout*/trunk/libstdc%2B%2B-v3/testsuite/performance/ext/pb_ds/priority_queue_text_modify_timing.cc"><tt>priority_queue_text_modify_down_timing_test</tt></a>

- thirty_years_among_the_dead_preproc.txt 200 200 2100 f)</p>

-<h2><a name="purpose" id="purpose">Purpose</a></h2>

-<p>The main purpose of this test is to contrast <a href="priority_queue_text_modify_up_timing_test.html">Priority Queue

- Text <tt>modify</tt> Timing Test - I</a>.</p>

-<h2><a name="results" id="results">Results</a></h2>

-<p>Figures <a href="#NPG">NPG</a>, <a href="#NPM">NPM</a>, and

- <a href="#NPL">NPL</a> show the results for the native priority

- 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

- <a href="pq_performance_tests.html#local"><u>local</u></a>,

- respectively; Figures <a href="#NRTG">NRTG</a>, <a href="#NRTM">NRTM</a>, and <a href="#NRTL">NRTL</a> show the results

- for the pairing heap and thin heaps in <a href="pq_performance_tests.html#gcc"><u>g++</u></a>, <a href="pq_performance_tests.html#msvc"><u>msvc++</u></a>, and

- <a href="pq_performance_tests.html#local"><u>local</u></a>,

- respectively,</p>

-<div id="NPG_res_div">

-<div id="NPG_gcc">

-<div id="NPG_priority_queue_text_modify_down_timing_test">

-<div id="NPG_pq">

-<div id="NPG_Native_and__tt_pb_ds_455tt__priority_queue__tt_modify_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_modify_down_timing_test_gcc.png" alt="no image" /></a></h6>NPG: Native and <tt>pb ds</tt> priority queue <tt>modify</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>

-<ol>

-<li>

-n_pq_deque-

-<tt>std::priority_queue</tt> adapting <tt>std::deque</tt></li>

-<li>

-n_pq_vector-

-<tt>std::priority_queue</tt> adapting <tt>std::vector</tt></li>

-<li>

-binary_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="binary_heap_tag.html"><tt>binary_heap_tag</tt></a>

-</li>

-<li>

-thin_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="thin_heap_tag.html"><tt>thin_heap_tag</tt></a>

-</li>

-<li>

-rc_binomial_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="rc_binomial_heap_tag.html"><tt>rc_binomial_heap_tag</tt></a>

-</li>

-<li>

-binomial_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="binomial_heap_tag.html"><tt>binomial_heap_tag</tt></a>

-</li>

-<li>

-pairing_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="pairing_heap_tag.html"><tt>pairing_heap_tag</tt></a>

-</li>

-</ol>

-</div><div style="width: 100%; height: 20px"></div></div>

-</div>

-<div id="NPM_res_div">

-<div id="NPM_msvc">

-<div id="NPM_priority_queue_text_modify_down_timing_test">

-<div id="NPM_pq">

-<div id="NPM_Native_and__tt_pb_ds_455tt__priority_queue__tt_modify_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_modify_down_timing_test_msvc.png" alt="no image" /></a></h6>NPM: Native and <tt>pb ds</tt> priority queue <tt>modify</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>

-<ol>

-<li>

-n_pq_deque-

-<tt>std::priority_queue</tt> adapting <tt>std::deque</tt></li>

-<li>

-n_pq_vector-

-<tt>std::priority_queue</tt> adapting <tt>std::vector</tt></li>

-<li>

-binary_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="binary_heap_tag.html"><tt>binary_heap_tag</tt></a>

-</li>

-<li>

-thin_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="thin_heap_tag.html"><tt>thin_heap_tag</tt></a>

-</li>

-<li>

-rc_binomial_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="rc_binomial_heap_tag.html"><tt>rc_binomial_heap_tag</tt></a>

-</li>

-<li>

-binomial_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="binomial_heap_tag.html"><tt>binomial_heap_tag</tt></a>

-</li>

-<li>

-pairing_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="pairing_heap_tag.html"><tt>pairing_heap_tag</tt></a>

-</li>

-</ol>

-</div><div style="width: 100%; height: 20px"></div></div>

-</div>

-<div id="NPL_res_div">

-<div id="NPL_local">

-<div id="NPL_priority_queue_text_modify_down_timing_test">

-<div id="NPL_pq">

-<div id="NPL_Native_and__tt_pb_ds_455tt__priority_queue__tt_modify_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_modify_down_timing_test_local.png" alt="no image" /></a></h6>NPL: Native and <tt>pb ds</tt> priority queue <tt>modify</tt> timing test - <a href = "pq_performance_tests.html#local">local</a></div><div style = "width: 100%; height: 20px"></div></div>

-</div>

-<div id="NRTG_res_div">

-<div id="NRTG_gcc">

-<div id="NRTG_priority_queue_text_modify_down_timing_test_pairing_thin">

-<div id="NRTG_pq">

-<div id="NRTG_Pairing_and_thin__priority_queue__tt_modify_455tt__timing_test"><div style="border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class="c1"><a name="NRTG" id="NRTG"><img src="priority_queue_text_modify_down_timing_test_pairing_thin_gcc.png" alt="no image" /></a></h6>NRTG: Pairing and thin priority queue <tt>modify</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>

-<ol>

-<li>

-thin_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="thin_heap_tag.html"><tt>thin_heap_tag</tt></a>

-</li>

-<li>

-pairing_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="pairing_heap_tag.html"><tt>pairing_heap_tag</tt></a>

-</li>

-</ol>

-</div><div style="width: 100%; height: 20px"></div></div>

-</div>

-<div id="NRTM_res_div">

-<div id="NRTM_msvc">

-<div id="NRTM_priority_queue_text_modify_down_timing_test_pairing_thin">

-<div id="NRTM_pq">

-<div id="NRTM_Pairing_and_thin__priority_queue__tt_modify_455tt__timing_test"><div style="border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class="c1"><a name="NRTM" id="NRTM"><img src="priority_queue_text_modify_down_timing_test_pairing_thin_msvc.png" alt="no image" /></a></h6>NRTM: Pairing and thin priority queue <tt>modify</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>

-<ol>

-<li>

-thin_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="thin_heap_tag.html"><tt>thin_heap_tag</tt></a>

-</li>

-<li>

-pairing_heap-

-<a href="priority_queue.html"><tt>priority_queue</tt></a>

- with <tt>Tag</tt> = <a href="pairing_heap_tag.html"><tt>pairing_heap_tag</tt></a>

-</li>

-</ol>

-</div><div style="width: 100%; height: 20px"></div></div>

-</div>

-<div id="NRTL_res_div">

-<div id="NRTL_local">

-<div id="NRTL_priority_queue_text_modify_down_timing_test_pairing_thin">

-<div id="NRTL_pq">

-<div id="NRTL_Pairing_and_thin__priority_queue__tt_modify_455tt__timing_test"><div style = "border-style: dotted; border-width: 1px; border-color: lightgray"><h6 class="c1"><a name="NRTL" id= "NRTL"><img src="priority_queue_text_modify_down_timing_test_pairing_thin_local.png" alt="no image" /></a></h6>NRTL: Pairing and thin priority queue <tt>modify</tt> timing test - <a href = "pq_performance_tests.html#local">local</a></div><div style = "width: 100%; height: 20px"></div></div>

-</div>

-<h2><a name="observations" id="observations">Observations</a></h2>

-<p>Most points in these results are similar to <a href="priority_queue_text_modify_up_timing_test.html">Priority Queue

- Text <tt>modify</tt> Timing Test - I</a>.</p>

-<p>It is interesting to note, however, that as opposed to that

- test, a thin heap (<a href="priority_queue.html"><tt>priority_queue</tt></a> with

- <tt>Tag</tt> = <a href="thin_heap_tag.html"><tt>thin_heap_tag</tt></a>) is

- outperformed by a pairing heap (<a href="priority_queue.html"><tt>priority_queue</tt></a> with

- <tt>Tag</tt> = <a href="pairing_heap_tag.html"><tt>pairing_heap_tag</tt></a>).

- In this case, both heaps essentially perform an <tt>erase</tt>

- operation followed by a <tt>push</tt> operation. As the other

- tests show, a pairing heap is usually far more efficient than a

- thin heap, so this is not surprising.</p>

-<p>Most algorithms that involve priority queues increase values

- (in the sense of the priority queue's comparison functor), and

- so <a href="priority_queue_text_modify_up_timing_test.html">Priority Queue

- Text <tt>modify</tt> Timing Test - I</a> is more interesting

- than this test.</p>

-</div>

-</body>

-</html>