threading era

In the multi-core era, x86 rdtsc commands should not be used to test the command cycle and time Chen ShuoBlog.csdn.net/solstice Since Intel Pentium added the rdtsc command, this command is a powerful tool for micro-Benchmarking. It can get high-precision time stamp counter at a very small cost ), many articles about optimization [1] and books use it to compare the speed of two sections of code. Some code even uses the rdtsc command to timing, replac

Discussion: in the new era of flash, RomWhy are the assistants who have been replaced by the "Flash Player" for short, given such a sacred name? The hype of Flash brush is always surging, so we have to listen to the best practices of Flash brush around us. Countless flash brush software make us more dazzled, and strive to be simple, fast, and all-round flash machine artifacts. Therefore, it has become a new goal shared by flash fans. In the view of t

TA has more than two years, there are more times on the market hand tour appears, however, many project groups are still deterred. The most tangled is the problem of efficiency,Today, according to their own understanding, talk about how you can do a high-efficiency sub-era hand-tour.In the second time, the most representative piece is the scene, which occupies a large proportion of the people's vision, and the scene is the most important is the surfac

Cloud Platform in the Internet field has become one of the new fields of infrastructure in cloud era, and the demand and technology innovation of cloud era are also the future directions for many developers to consider and advance. Cloud projects, cloud products, cloud applications, cloud enjoyment, as the cloud services, more enterprises and developers began to stroll the cloud, and a good and compatible w

With the advent of the Internet + ERA, the traditional enterprise is like a bloated and clumsy elephant, in the Internet + Mire walk steadily, eventually submerged. In order to avoid becoming the elephant in the mire, tens of thousands of traditional enterprises in the transformation road need a "elephant's predicament--the Internet + ERA of traditional enterprise transformation problem" in the face of comp

... If you want to buy a car, you have to have money.Accuracy VerificationFinally, let's verify the accuracy of today's clustering algorithm, and what is the difference between the decision tree algorithms in the previous article, we click into the data Mining accuracy chart:We can see that today's cluster analysis algorithm, the score is 0.72, than the previous decision tree algorithm 0.87, or a slight gap, of course, can not only score to evaluate the quality of the two algorithms, different

the rankings, you can see that the MongoDB database stands out from many RDBMS (relational databases), has become the fifth place, and is still rising.　　If the database analogy to the adult class, then MongoDB can be said to be a prodigy, only 5-year-old he alone challenged a group of uncle-level characters, and according to the pace of development in recent years, he is about to surpass Pgsql to become the fourth place, Although the distance from the front three has NB Dad's rich second genera

knowledge site Db-engines last month.　　From the rankings, you can see that the MongoDB database stands out from many RDBMS (relational databases), has become the fifth place, and is still rising.　　If the database analogy to the adult class, then MongoDB can be said to be a prodigy, only 5-year-old he alone challenged a group of uncle-level characters, and according to the pace of development in recent years, he is about to surpass Pgsql to become the fourth place, Although the distance from the

With the advent of the big data age, the importance of data mining becomes apparent, and several simple data mining algorithms, as the lowest tier, are now being used to make a brief summary of the Microsoft Data Case Library.Application Scenario IntroductionIn fact, the scene of data mining applications everywhere, many of the environment will be applied to data mining, before we did not apply because we have not learned to use the data, or have not realized the importance of data, now with the

ECharts-in the big data era, data charts and echarts data charts are redefined. ECharts Canvas-based PureJavascriptThe chart Library provides intuitive, vivid, interactive, And customizable data visualization charts. The innovative drag-and-drop re-computing, data view, value-range roaming and other features greatly enhance the user experience and give users the ability to mine and integrate data. Compatible with most browsers, including IE6/7/8/9 +,

Due to a product vulnerability in Iot era, Getshell needs to carefully check the source code (discover webshells) Found the predecessor shell. Source git information leakage: http://vip.now.net.cn/.git Download the source code found that there is a trojan: http://vip.now.net.cn/api/svn_host.php password: angelThe other two sites: http://webmail.now.net.cn/api/svn_host.phphttp://webmail.now.cn/api/svn_host.php Then scan the burp: http://mx600.now.net

the great danger significantly greater than the opportunity. As the most important content path and future direction of the local website, it is necessary to hold firmly in the hands. We expect me to write a local website mobile direction selection, in fact, I am also a beginner, recently done some ideas to comb, and we share, please we correct: first, the local community mobile, abandoned chatty content positioning, focus on small and specialized crowd positioning in the PC age, a community or

basic computer technology knowledge to be solid, according to various enterprises, Various types of job needs, supplemented with post-related ios technical knowledge, and focus on the update, closely follow the industry development. In addition, pay attention to the accumulation of project experience, this to ios talent training put forward higher requirements. but how to learn iOS This technology, self-study? Money training? In fact, each of these two methods have pros and cons, self-study i

190,000 IPv4 terminal, or 100,000 Ipv4/ipv6 dual-stack terminal to provide unified access and management, can be 1000 terminals per second to provide certification services. So, even if mobile smart terminals and traditional PC-hosted businesses are mixed together, the "minimalist network" will leave you feeling bloated and unruly.In addition, the vigorous development of mobile internet has spawned a brand-new network, which is " mobile network". As a network designed specifically for mobile sm

The night before attending the linuxcon 2011 conference in Yokohama, Japan,Linus torvalsdJust nowGitMarkedWindows 3.0-RC1, AndKlmlSubmitted relevant announcementsThis also marks that the Linux operating system will eventually leave the 2.6 series kernel, opening a new era of 3.0. In fact, just a week ago, Linus was still considering whether to end the Linux 2.6 series kernel. After all, it had already gone through 39 major versions in a row, and its s

Welcome to the new era of mobile Internet applications Jia Dong, president and CEO of Beijing zhongke Hongqi Software Technology Co., Ltd. Many people ask me, what are your most favored technologies and applications in 2009? It is very simple, that is, mobile Internet applications. With the deepening of information technology, people's requirements for information technology development are no longer satisfied with "more powerful performance, lower

Discovery focus I have just read an article about Web, online information storage: completing the web as platform. This paper proposes a very valuable idea, that is, the author observed that with the popularization of online software in the web era, the old storage pattern may change. Coincidentally, I work in the Web + storage area. I found that I am very interested in it. I will not talk much about the original article. Interested readers can refe

is a game of guessing numbers. He is in the circle where goto came to goto, like entering a maze. Fortunately, the size of this maze is not big, and it is easy to find out what he is doing. The reason why this code can be saved to the present is that it is not saved in a floppy disk like other codes, but recorded in the blank space of the book. 10 print "guess a number"20 input30 if a> 5 Then goto 6040 if a 50 if a = 5 Then goto 10060 print "too big"70 goto 2080 print "too small"90 goto

In the big data era, with the rapid development of the telecom industry and the upgrading of the network standard, as the scale of 4G mobile networks continues to expand, the mobile network data traffic will surge again. For operators, traffic has become the main revenue growth point, but how to refine network operations and improve the profit of traffic operations has become an urgent problem for operators. For operators, optimizing the network, impr