{"id":1671,"date":"2018-09-20T16:25:46","date_gmt":"2018-09-20T08:25:46","guid":{"rendered":"https:\/\/damogame.cn:15443\/wordpress\/?p=1671"},"modified":"2018-09-20T16:25:46","modified_gmt":"2018-09-20T08:25:46","slug":"c%e4%bc%98%e5%8c%96%e5%b7%a5%e5%85%b7gprof","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/1671","title":{"rendered":"c++\u4f18\u5316\u5de5\u5177Gprof"},"content":{"rendered":"<div class=\"article-header-box\">\n<div class=\"article-header\">\n<div class=\"article-title-box\">\n<h1 class=\"title-article\">c++\u4f18\u5316\u5de5\u5177Gprof<\/h1>\n<\/div>\n<div class=\"article-info-box\">\n<div class=\"article-bar-top\"><span class=\"time\">2017\u5e7402\u670820\u65e5 22:21:23<\/span>\u00a0<a class=\"follow-nickName\" href=\"https:\/\/me.csdn.net\/jacke121\" target=\"_blank\" rel=\"noopener\">ShellCollector<\/a>\u00a0<span class=\"read-count\">\u9605\u8bfb\u6570\uff1a870<\/span><span class=\"article_info_click\">\u66f4\u591a<\/span><\/p>\n<div class=\"tags-box space\"><span class=\"label\">\u4e2a\u4eba\u5206\u7c7b\uff1a<\/span>\u00a0<a class=\"tag-link\" href=\"https:\/\/blog.csdn.net\/jacke121\/article\/category\/6736933\" target=\"_blank\" rel=\"noopener\">c++\u4f18\u5316<\/a><\/div>\n<\/div>\n<div class=\"operating\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<article>\n<div id=\"article_content\" class=\"article_content clearfix csdn-tracking-statistics\" data-pid=\"blog\" data-mod=\"popu_307\" data-dsm=\"post\">\n<div class=\"htmledit_views\">\n<div id=\"navCategory\" class=\"dir\">\n<h3><a name=\"t0\"><\/a>\u539f\u6587\uff1ahttp:\/\/www.cnblogs.com\/me115\/archive\/2013\/06\/05\/3117967.html<\/h3>\n<h3><a name=\"t1\"><\/a>\u5185\u5bb9\u76ee\u5f55\uff1a<\/h3>\n<ul>\n<li><a href=\"http:\/\/www.cnblogs.com\/me115\/archive\/2013\/06\/05\/3117967.html#h20\" target=\"_blank\" rel=\"nofollow noopener\">1 Gprof<\/a><\/li>\n<li><a href=\"http:\/\/www.cnblogs.com\/me115\/archive\/2013\/06\/05\/3117967.html#h21\" target=\"_blank\" rel=\"nofollow noopener\">2. gprof\u4f7f\u7528\u6b65\u9aa4<\/a><\/li>\n<li><a href=\"http:\/\/www.cnblogs.com\/me115\/archive\/2013\/06\/05\/3117967.html#h22\" target=\"_blank\" rel=\"nofollow noopener\">1.\u521d\u59cb\u5316\u5927\u5bf9\u8c61\u8017\u65f6<\/a><\/li>\n<li><a href=\"http:\/\/www.cnblogs.com\/me115\/archive\/2013\/06\/05\/3117967.html#h23\" target=\"_blank\" rel=\"nofollow noopener\">2.Map\u4f7f\u7528\u4e0d\u5f53<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"postBody\">\n<div id=\"cnblogs_post_body\">\n<h1><a name=\"t2\"><\/a>\u4f18\u5316\u51c6\u5219\uff1a<\/h1>\n<p>1. 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profile\u5de5\u5177\uff0c\u53ef\u4ee5\u8fd0\u884c\u4e8elinux\u3001AIX\u3001Sun\u7b49\u64cd\u4f5c\u7cfb\u7edf\u8fdb\u884cC\u3001C++\u3001Pascal\u3001Fortran\u7a0b\u5e8f\u7684\u6027\u80fd\u5206\u6790\uff0c\u7528\u4e8e\u7a0b\u5e8f\u7684\u6027\u80fd\u4f18\u5316\u4ee5\u53ca\u7a0b\u5e8f\u74f6\u9888\u95ee\u9898\u7684\u67e5\u627e\u548c\u89e3\u51b3\u3002\u901a\u8fc7\u5206\u6790\u5e94\u7528\u7a0b\u5e8f\u8fd0\u884c\u65f6\u4ea7\u751f\u7684\u201cflat profile\u201d\uff0c\u53ef\u4ee5\u5f97\u5230\u6bcf\u4e2a\u51fd\u6570\u7684\u8c03\u7528\u6b21\u6570\uff0c\u6d88\u8017\u7684CPU\u65f6\u95f4\uff08\u53ea\u7edf\u8ba1CPU\u65f6\u95f4\uff0c\u5bf9IO\u74f6\u9888\u65e0\u80fd\u4e3a\u529b\uff09\uff0c\u4e5f\u53ef\u4ee5\u5f97\u5230\u51fd\u6570\u7684\u201c\u8c03\u7528\u5173\u7cfb\u56fe\u201d\uff0c\u5305\u62ec\u51fd\u6570\u8c03\u7528\u7684\u5c42\u6b21\u5173\u7cfb\uff0c\u6bcf\u4e2a\u51fd\u6570\u8c03\u7528\u82b1\u8d39\u4e86\u591a\u5c11\u65f6\u95f4\u3002<\/p>\n<h2 id=\"h21\"><a name=\"t5\"><\/a>2. gprof\u4f7f\u7528\u6b65\u9aa4<\/h2>\n<p>1) \u7528gcc\u3001g++\u3001xlC\u7f16\u8bd1\u7a0b\u5e8f\u65f6\uff0c\u4f7f\u7528-pg\u53c2\u6570\uff0c\u5982\uff1ag++ -pg -o test.exe test.cpp\u7f16\u8bd1\u5668\u4f1a\u81ea\u52a8\u5728\u76ee\u6807\u4ee3\u7801\u4e2d\u63d2\u5165\u7528\u4e8e\u6027\u80fd\u6d4b\u8bd5\u7684\u4ee3\u7801\u7247\u65ad\uff0c\u8fd9\u4e9b\u4ee3\u7801\u5728\u7a0b\u5e8f\u8fd0\u884c\u65f6\u91c7\u96c6\u5e76\u8bb0\u5f55\u51fd\u6570\u7684\u8c03\u7528\u5173\u7cfb\u548c\u8c03\u7528\u6b21\u6570\uff0c\u5e76\u8bb0\u5f55\u51fd\u6570\u81ea\u8eab\u6267\u884c\u65f6\u95f4\u548c\u88ab\u8c03\u7528\u51fd\u6570\u7684\u6267\u884c\u65f6\u95f4\u3002<br \/>\n2) \u6267\u884c\u7f16\u8bd1\u540e\u7684\u53ef\u6267\u884c\u7a0b\u5e8f\uff0c\u5982\uff1a.\/test.exe\u3002\u8be5\u6b65\u9aa4\u8fd0\u884c\u7a0b\u5e8f\u7684\u65f6\u95f4\u4f1a\u7a0d\u6162\u4e8e\u6b63\u5e38\u7f16\u8bd1\u7684\u53ef\u6267\u884c\u7a0b\u5e8f\u7684\u8fd0\u884c\u65f6\u95f4\u3002\u7a0b\u5e8f\u8fd0\u884c\u7ed3\u675f\u540e\uff0c\u4f1a\u5728\u7a0b\u5e8f\u6240\u5728\u8def\u5f84\u4e0b\u751f\u6210\u4e00\u4e2a\u7f3a\u7701\u6587\u4ef6\u540d\u4e3agmon.out\u7684\u6587\u4ef6\uff0c\u8fd9\u4e2a\u6587\u4ef6\u5c31\u662f\u8bb0\u5f55\u7a0b\u5e8f\u8fd0\u884c\u7684\u6027\u80fd\u3001\u8c03\u7528\u5173\u7cfb\u3001\u8c03\u7528\u6b21\u6570\u7b49\u4fe1\u606f\u7684\u6570\u636e\u6587\u4ef6\u3002<br \/>\n3) \u4f7f\u7528gprof\u547d\u4ee4\u6765\u5206\u6790\u8bb0\u5f55\u7a0b\u5e8f\u8fd0\u884c\u4fe1\u606f\u7684gmon.out\u6587\u4ef6\uff0c\u5982\uff1agprof test.exe gmon.out\u5219\u53ef\u4ee5\u5728\u663e\u793a\u5668\u4e0a\u770b\u5230\u51fd\u6570\u8c03\u7528\u76f8\u5173\u7684\u7edf\u8ba1\u3001\u5206\u6790\u4fe1\u606f\u3002\u4e0a\u8ff0\u4fe1\u606f\u4e5f\u53ef\u4ee5\u91c7\u7528gprof test.exe gmon.out&gt; gprofresult.txt\u91cd\u5b9a\u5411\u5230\u6587\u672c\u6587\u4ef6\u4ee5\u4fbf\u4e8e\u540e\u7eed\u5206\u6790\u3002<\/p>\n<p>\u4ee5\u4e0a\u53ea\u662fgpro\u7684\u4f7f\u7528\u6b65\u9aa4\u7b80\u4ecb\uff0c\u5173\u4e8egprof\u4f7f\u7528\u5b9e\u4f8b\u8be6\u89c1\u9644\u5f551\uff1b<\/p>\n<h1><a name=\"t6\"><\/a>\u5b9e\u8df5<\/h1>\n<p>\u6211\u4eec\u7684\u7a0b\u5e8f\u9047\u5230\u4e86\u6027\u80fd\u74f6\u9888\uff0c\u5728\u91c7\u7528\u67b6\u6784\u6539\u9020\uff0c\u6539\u7528\u5185\u5b58\u6570\u636e\u5e93\u4e4b\u524d\uff0c\u6211\u4eec\u8003\u8651\u4ece\u4ee3\u7801\u7ea7\u5165\u624b\uff0c\u5148\u5c1d\u8bd5\u4ee3\u7801\u7ea7\u7684\u4f18\u5316\uff1b\u901a\u8fc7\u4f7f\u7528gprof\u5206\u6790\uff0c\u6211\u4eec\u53d1\u73b0\u4ee5\u4e0b2\u4e2a\u6700\u4e3a\u7a81\u51fa\u7684\u95ee\u9898\uff1a<\/p>\n<h2 id=\"h22\"><a name=\"t7\"><\/a>1.\u521d\u59cb\u5316\u5927\u5bf9\u8c61\u8017\u65f6<\/h2>\n<p>\u5206\u6790\u62a5\u544a\uff1a307 6.5% VOBJ1::VOBJ1@240038VOBJ1<br \/>\n\u5728\u6574\u4e2a\u6267\u884c\u6d41\u7a0b\u4e2d\u88ab\u8c03\u7528307\u6b21\uff0c\u5176\u5bf9\u8c61\u521d\u59cb\u5316\u8017\u65f6\u5360\u52306.5%\u3002<br \/>\n\u8fd9\u4e2a\u5bf9\u8c61\u5f88\u5927\uff0c\u5305\u542b\u7684\u5c5e\u6027\u591a\uff0c\u5c5e\u4e8e\u57fa\u7840\u6570\u636e\u7ed3\u6784\uff1b<br \/>\n\u5728\u7a0b\u5e8f\u8fdb\u5165\u6784\u9020\u51fd\u6570\u51fd\u6570\u4f53\u4e4b\u524d\uff0c\u7c7b\u7684\u7236\u7c7b\u5bf9\u8c61\u548c\u6240\u6709\u5b50\u6210\u5458\u53d8\u91cf\u5bf9\u8c61\u5df2\u7ecf\u88ab\u751f\u6210\u548c\u6784\u9020\u3002\u5982\u679c\u5728\u6784\u9020\u51fd\u6570\u4f53\u5185\u4f4d\u5176\u6267\u884c\u8d4b\u503c\u64cd\u4f5c\uff0c\u663e\u793a\u5c5e\u4e8e\u6d6a\u8d39\u3002\u5982\u679c\u5728\u6784\u9020\u51fd\u6570\u65f6\u5df2\u7ecf\u77e5\u9053\u5982\u4f55\u4e3a\u7c7b\u7684\u5b50\u6210\u5458\u53d8\u91cf\u521d\u59cb\u5316\uff0c\u90a3\u4e48\u5e94\u8be5\u5c06\u8fd9\u4e9b\u521d\u59cb\u5316\u4fe1\u606f\u901a\u8fc7\u6784\u9020\u51fd\u6570\u7684\u521d\u59cb\u5316\u5217\u8868\u8d4b\u4e88\u5b50\u6210\u5458\u53d8\u91cf\uff0c\u800c\u4e0d\u662f\u5728\u6784\u9020\u51fd\u6570\u51fd\u6570\u4f53\u4e2d\u8fdb\u884c\u8fd9\u4e9b\u521d\u59cb\u5316\u3002\u56e0\u4e3a\u8fdb\u5165\u6784\u9020\u51fd\u6570\u51fd\u6570\u4f53\u4e4b\u524d\uff0c\u8fd9\u4e9b\u5b50\u6210\u5458\u53d8\u91cf\u5df2\u7ecf\u521d\u59cb\u5316\u8fc7\u4e00\u6b21\u4e86\u3002<br 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\/>\n\u89e3\u51b3\u65b9\u6cd5\uff1a\u6211\u4eec\u5c06\u5927\u90e8\u5206\u7684\u521d\u59cb\u5316\u64cd\u4f5c\u90fd\u79fb\u5230\u521d\u59cb\u5316\u5217\u8868\u4e2d\uff0c\u6027\u80fd\u6d88\u8017\u964d\u52301.8%\u3002<\/p>\n<h2 id=\"h23\"><a name=\"t8\"><\/a>2.Map\u4f7f\u7528\u4e0d\u5f53<\/h2>\n<p>\u5206\u6790\u62a5\u544a\uff1a89 6.8% Recordset::GetField<br \/>\nRecordset\u7684getField\u88ab\u8c03\u7528\u4e8689\u6b21\uff0c\u6027\u80fd\u6d88\u8017\u5360\u52306.8%;<br \/>\nRecordset\u662f\u6211\u4eec\u5728\u5728\u6570\u636e\u5e93\u5c42\u9762\u7684\u5305\u88c5\uff0c\u5bf9\u5e94\u53d6\u51fa\u6570\u636e\u7684\u8bb0\u5f55\u96c6\uff1b\uff08\u7528\u8fc7ADO\u7684\u670b\u53cb\u5f88\u719f\u6089\uff09\uff1b\u7531\u4e8e\u6211\u4eec\u4f7f\u7528\u7684\u662f\u5e95\u5c42c++\u6570\u636e\u5e93\u63a5\u53e3\uff0c\u901a\u8fc7\u5bf9\u6570\u636e\u5e93\u539f\u59cbapi\u8fdb\u884c\u4e00\u5c42\u5305\u88c5\uff0c\u4ece\u800c\u5c4f\u853d\u5f00\u53d1\u4eba\u5458\u5bf9\u5e95\u5c42api\u7684\u76f4\u63a5\u64cd\u4f5c\u3002\u8fd9\u6837\u7684\u5305\u88c5\uff0c\u5e26\u6765\u7684\u597d\u5904\u5c31\u662f\u4e0d\u7528\u76f4\u63a5\u4e0e\u5e95\u5c42\u6570\u636e\u5e93\u4ea4\u4e92\uff0c\u5728\u4ee3\u7801\u7f16\u5199\u65b9\u9762\u65b9\u4fbf\u4e0d\u5c11\uff0c\u4ee3\u7801\u53ef\u8bfb\u6027\u4e5f\u5f88\u597d\uff1b\u5e26\u6765\u7684\u95ee\u9898\u5c31\u662f\u6027\u80fd\u7684\u635f\u5931\uff1b<\/p>\n<p>\u5206\u6790\uff1a\uff082\u70b9\u539f\u56e0\uff09<br \/>\n1\uff09\u5728GetField\u51fd\u6570\u4e2d\uff0c\u4f7f\u7528\u4e86map[\u201ca\u201d]\u6765\u67e5\u8be2\u6570\u636e\uff0c\u5982\u679c\u627e\u4e0d\u5230\u201ca\u201d\uff0c\u5219map\u4f1a\u81ea\u52a8\u63d2\u5165key \u201da\u201d\uff0c\u5e76\u8bbevalue\u4e3a0\uff1b\u800cm.find(\u201ca\u201d)\u4e0d\u4f1a\u81ea\u52a8\u63d2\u5165\u4e0a\u8ff0pair\uff0c\u6267\u884c\u6548\u7387\u66f4\u9ad8\uff1b\u539f\u6709\u903b\u8f91\uff1a<\/p>\n<div>\n<div id=\"highlighter_380159\" class=\"syntaxhighlighter cpp\">\n<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td class=\"gutter\">\n<div class=\"line number1 index0 alt2\">1<\/div>\n<div class=\"line number2 index1 alt1\">2<\/div>\n<div class=\"line number3 index2 alt2\">3<\/div>\n<div class=\"line number4 index3 alt1\">4<\/div>\n<div class=\"line number5 index4 alt2\">5<\/div>\n<div class=\"line number6 index5 alt1\">6<\/div>\n<div class=\"line number7 index6 alt2\">7<\/div>\n<div class=\"line number8 index7 alt1\">8<\/div>\n<div class=\"line number9 index8 alt2\">9<\/div>\n<div class=\"line number10 index9 alt1\">10<\/div>\n<div class=\"line number11 index10 alt2\">11<\/div>\n<div class=\"line number12 index11 alt1\">12<\/div>\n<div class=\"line number13 index12 alt2\">13<\/div>\n<div class=\"line number14 index13 alt1\">14<\/div>\n<div class=\"line number15 index14 alt2\">15<\/div>\n<div class=\"line number16 index15 alt1\">16<\/div>\n<div class=\"line number17 index16 alt2\">17<\/div>\n<\/td>\n<td class=\"code\">\n<div>\n<div class=\"line number1 index0 alt2\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">string Recordset::GetField(<\/code><code class=\"cpp keyword bold\">const<\/code>\u00a0<code class=\"cpp plain\">string &amp;strName)<\/code><\/div>\n<div class=\"line number2 index1 alt1\"><code class=\"cpp plain\">{<\/code><\/div>\n<div class=\"line number3 index2 alt2\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp color1 bold\">int<\/code>\u00a0<code class=\"cpp plain\">nIndex;<\/code><\/div>\n<div class=\"line number4 index3 alt1\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp keyword bold\">if<\/code>\u00a0<code class=\"cpp plain\">(hasIndex==<\/code><code class=\"cpp keyword bold\">false<\/code><code class=\"cpp plain\">)<\/code><\/div>\n<div class=\"line number5 index4 alt2\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">{<\/code><\/div>\n<div class=\"line number6 index5 alt1\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">nIndex = m_nPos;<\/code><\/div>\n<div class=\"line number7 index6 alt2\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">}<\/code><\/div>\n<div class=\"line number8 index7 alt1\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp keyword bold\">else<\/code><\/div>\n<div class=\"line number9 index8 alt2\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">{<\/code><\/div>\n<div class=\"line number10 index9 alt1\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">nIndex = m_vSort[m_nPos].m_iorder;<\/code><\/div>\n<div class=\"line number11 index10 alt2\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">}<\/code><\/div>\n<div class=\"line number12 index11 alt1\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp keyword bold\">if<\/code>\u00a0<code class=\"cpp plain\">(m_fields[strName]==0)<\/code><\/div>\n<div class=\"line number13 index12 alt2\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">{<\/code><\/div>\n<div class=\"line number14 index13 alt1\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">LOG_ERR(<\/code><code class=\"cpp string\">\"Recordset::GetField:\"<\/code><code class=\"cpp plain\">&lt;&lt;strName&lt;&lt;<\/code><code class=\"cpp string\">\" Not Find!!\"<\/code><code class=\"cpp plain\">);<\/code><\/div>\n<div class=\"line number15 index14 alt2\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">}<\/code><\/div>\n<div class=\"line number16 index15 alt1\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp keyword bold\">return<\/code>\u00a0<code class=\"cpp plain\">m_records[nIndex].GetValue(m_fields[strName] - 1) ;<\/code><\/div>\n<div class=\"line number17 index16 alt2\"><code class=\"cpp plain\">}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p>\u6539\u9020\u540e\u7684\u903b\u8f91\uff1a<\/p>\n<div>\n<div id=\"highlighter_574498\" class=\"syntaxhighlighter cpp\">\n<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td class=\"gutter\">\n<div class=\"line number1 index0 alt2\">1<\/div>\n<div class=\"line number2 index1 alt1\">2<\/div>\n<div class=\"line number3 index2 alt2\">3<\/div>\n<div class=\"line number4 index3 alt1\">4<\/div>\n<div class=\"line number5 index4 alt2\">5<\/div>\n<div class=\"line number6 index5 alt1\">6<\/div>\n<div class=\"line number7 index6 alt2\">7<\/div>\n<\/td>\n<td class=\"code\">\n<div>\n<div class=\"line number1 index0 alt2\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">string Recordset::GetField(<\/code><code class=\"cpp keyword bold\">const<\/code>\u00a0<code class=\"cpp plain\">string &amp;strName)<\/code><\/div>\n<div class=\"line number2 index1 alt1\"><code class=\"cpp plain\">{<\/code><\/div>\n<div class=\"line number3 index2 alt2\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">unordered_map::iterator iter = m_fields.find(strName);<\/code><\/div>\n<div class=\"line number4 index3 alt1\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp keyword bold\">if<\/code>\u00a0<code class=\"cpp plain\">(iter == m_fields.end())<\/code><\/div>\n<div class=\"line number5 index4 alt2\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">{<\/code><\/div>\n<div class=\"line number6 index5 alt1\"><code class=\"cpp spaces\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code><code class=\"cpp plain\">LOG_ERR(<\/code><code class=\"cpp string\">\"[Recordset::GetField] \"<\/code><code class=\"cpp plain\">&lt;&lt; strName &lt;second - 1) ;<\/code><\/div>\n<div class=\"line number7 index6 alt2\"><code class=\"cpp plain\">}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p>\u8c03\u6574\u540e\u7684Recordset::GetField\u7684\u6267\u884c\u65f6\u95f4\u7ea6\u662f\u4e4b\u524d\u76841\/2\uff1b\u4e14\u6613\u8bfb\u6027\u66f4\u9ad8\uff1b<\/p>\n<p>2\uff09\u5728Recordset\u4e2d\uff0c\u5bf9\u4e8e\u6bcf\u4e2a\u5b57\u6bb5\u7684\u5b58\u50a8\uff0c\u4f7f\u7528\u7684\u662fmap m_fields; g++\u4e2d\u7684stl\u6807\u51c6\u5e93\u4e2d\u9ed8\u8ba4\u4f7f\u7528\u7684\u7ea2\u9ed1\u6811\u4f5c\u4e3amap\u7684\u5e95\u5c42\u6570\u636e\u7ed3\u6784\uff1b<br \/>\n\u901a\u8fc7\u9644\u5f55\u4e2d\u7684\u6587\u68632\uff0c\u6211\u4eec\u53d1\u73b0\u5176\u5b9e\u6709\u66f4\u5feb\u7684\u7ed3\u6784\uff0c\u00a0\u5728\u6548\u7387\u4e0a\uff0cunorder map\u4f18\u4e8ehash map, hash map \u4f18\u4e8e \u7ea2\u9ed1\u6811\uff1b\u5982\u679c\u4e0d\u8981\u6c42map\u6709\u5e8f\uff0cunordered_map \u662f\u66f4\u597d\u7684\u9009\u62e9\uff1b<br \/>\n\u89e3\u51b3\u65b9\u6cd5\uff1a\u5c06map\u7ed3\u6784\u6362\u6210unordered_map\uff0c\u6027\u80fd\u6d88\u8017\u964d\u52301.4%\uff1b<\/p>\n<h1><a name=\"t9\"><\/a>\u603b\u7ed3<\/h1>\n<p>\u6211\u4eec\u4fee\u6539\u4e0d\u523030\u884c\u4ee3\u7801\uff0c\u6574\u4f53\u6027\u80fd\u63d0\u534710%\u5de6\u53f3\uff0c\u6548\u679c\u660e\u663e\uff1b\u6253\u86c7\u6253\u4e03\u5bf8\uff0c\u6027\u80fd\u4f18\u5316\u7684\u5173\u952e\u5728\u4e8e\u627e\u51c6\u5f85\u4f18\u5316\u7684\u70b9\uff0c\u4e4b\u540e\u7684\u4e8b\uff0c\u4e5f\u5c31\u6c34\u5230\u6e20\u6210\uff1b<\/p>\n<h1><a name=\"t10\"><\/a>\u9644\u5f55\uff1a<\/h1>\n<p>\u96441\uff1a<a href=\"http:\/\/blog.chinaunix.net\/uid-25194149-id-3215487.html\" target=\"_blank\" rel=\"nofollow noopener\">prof\u5de5\u5177\u4ecb\u7ecd\u53ca\u5b9e\u8df5<\/a><br \/>\n\u96442\uff1a\u00a0<a href=\"http:\/\/blog.chinaunix.net\/uid-20384806-id-3055333.html\" target=\"_blank\" rel=\"nofollow noopener\">map hash_map unordered_map \u6027\u80fd\u6d4b\u8bd5<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>c++\u4f18\u5316\u5de5\u5177Gprof 2017\u5e7402<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[118],"class_list":["post-1671","post","type-post","status-publish","format-standard","hentry","tag-02-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/1671","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=1671"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/1671\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=1671"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=1671"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=1671"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}