{"id":26,"date":"2024-09-10T07:24:32","date_gmt":"2024-09-09T23:24:32","guid":{"rendered":"http:\/\/chaixiangyu.cn\/?p=26"},"modified":"2024-09-11T21:40:46","modified_gmt":"2024-09-11T13:40:46","slug":"armadillo%e4%bd%bf%e7%94%a8%e4%bb%8b%e7%bb%8d%ef%bc%88%e4%b8%83%ef%bc%89%ef%bc%9awall_clock","status":"publish","type":"post","link":"https:\/\/chaixiangyu.cn\/?p=26","title":{"rendered":"Armadillo\u4f7f\u7528\u4ecb\u7ecd\uff08\u4e03\uff09\uff1awall_clock"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">wall_clock<\/h1>\n\n\n\n<p>\u7528\u9014\uff1a<em>wall_clock\u51fd\u6570\u7528\u4e8e\u8ba1\u65f6<\/em><br>\u7c7b\u578b\uff1a<em>\u666e\u901a\u51fd\u6570<\/em><br>\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>wall_clock timer;\n\nmat A = randu&lt;mat&gt;(100,100);\nmat B = randu&lt;mat&gt;(100,100);\nmat C;\n\ntimer.tic();\n\nfor(uword i=0; i&lt;10000; ++i)\n  {\n  C = A + B + A + B;\n  }\n\ndouble n = timer.toc();\n\ncout &lt;&lt; \"number of seconds: \" &lt;&lt; n &lt;&lt; endl;<\/code><\/pre>\n\n\n\n<p>\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>number of seconds: 5.776\n\u8bf7\u6309\u4efb\u610f\u952e\u7ee7\u7eed. . .<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>wall_clock \u7528\u9014\uff1awall_clock\u51fd\u6570\u7528\u4e8e\u8ba1\u65f6\u7c7b\u578b\uff1a\u666e\u901a\u51fd\u6570\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a \u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-26","post","type-post","status-publish","format-standard","hentry","category-algorithm"],"_links":{"self":[{"href":"https:\/\/chaixiangyu.cn\/index.php?rest_route=\/wp\/v2\/posts\/26","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chaixiangyu.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chaixiangyu.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chaixiangyu.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chaixiangyu.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=26"}],"version-history":[{"count":1,"href":"https:\/\/chaixiangyu.cn\/index.php?rest_route=\/wp\/v2\/posts\/26\/revisions"}],"predecessor-version":[{"id":27,"href":"https:\/\/chaixiangyu.cn\/index.php?rest_route=\/wp\/v2\/posts\/26\/revisions\/27"}],"wp:attachment":[{"href":"https:\/\/chaixiangyu.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=26"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chaixiangyu.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=26"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chaixiangyu.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=26"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}