Speed Test Index

First, the importance of the index The index is used to quickly find a column in a particular value of the line. Instead of using an index, MySQL must start with the first record and then read the entire table until it finds the relevant row. The larger the table, the more time it takes. If the table in the query column index, MySQL can quickly reach a location to search the middle of the data file, there is no need to see all the data. Note that if you need to access most of the rows, sequential reads are much faster since we avoid disk searches. If you use Xinhua Dictionary to find "Zhang" the Chinese characters, do not use the directory, then ...

Several guidelines on the establishment of the index: 1, a reasonable indexing can speed up the efficiency of data reading, but unreasonable indexing will slow down the database response speed. 2, the more the index, the slower the update data. 3, try to use the index when using MyIsam as an engine (because MySQL uses BTree to store indexes), not InnoDB. But MyISAM does not support Transcation. 4, when your program and database structure / SQL statement has been optimized to the extent that can not be optimized, and the program bottleneck can not be successfully resolved, then ...

In the current trend of mobile Internet, all walks of life are trying to use mobile applications as a carrier, and then the layout of the mobile Internet market, the entire community has realized that mobile applications are the main entrance for consumers in the future, layout as soon as possible to cover the existing Customers and potential customers. To this end, the world's first mobile App real cloud test platform Testin cloud test, recently released by the "China Android Application Index Report (June report)", mining just over the past June what are the most noteworthy applications, and the underlying potential Business opportunities. Testin cloud since the world's first launch in 2011 ...

In the current trend of mobile Internet, all walks of life are trying to use mobile applications as a carrier, and then the layout of the mobile Internet market, the entire community has realized that mobile applications are the main entrance for consumers in the future, layout as soon as possible to cover the existing Customers and potential customers. To this end, the world's first mobile App real cloud test platform Testin cloud test, recently released by the "China Android Application Index Report (June report)", mining just over the past June what are the most noteworthy applications, and the underlying potential Business opportunities. Testin cloud since the world's first launch in 2011 ...

Guerrilla usability testing is a very effective technique. Designer Martin Belland once said: "It's an art, like a random pick-up in a café or public place, where he can take a few minutes of video while browsing the web." 　　"Now we're just going to skip the conversation, get to the subtlety, get to it, and share the feedback with the team." I recently participated in a Quick Launch project that required my team to complete a responsive web site in a very short time. Give us time to develop is very short, user research ...

Absrtact: 2013, Smart TV has become one of the hottest end products in China. For a time, the market appeared a large number of smart labels on the TV brand, from market research, the majority of TV manufacturers to provide a good intelligent interactive experience 2013, Smart TV has become one of the hottest end products. For a time, the market appeared a large number of smart labels on the TV brands, from market research, the majority of TV manufacturers to provide a good intelligent interactive experience, but there are some manufacturers of fish ...

Recently, the public comment on the release of the 2014 provincial capital city "eat and Drink" index, the data show that Xi ' an living convenience index into the TOP10, ranked Nineth in the country. According to statistics, Xi ' an catering total merchants reached 36,000, of which the mutton bun, cool flesh pinch bun mainly dozen local snacks merchants more than 13,000 home. "Convenience", "leisure" and "shrewd" became the city label of Xian. Xi ' An hot spring occupies the country most, the hot group buys the average monthly consumption amount in the foot bath consumption is nearly 40%. In addition, Xi ' an discount merchants accounted for 7.85%, ranking ...

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Absrtact: ZTE published a report entitled "Rough solutions to the aging test report of Hammer T1 mobile phone", which was interpreted by the Hammer technology founder Luo's "Smartisan T1 accelerated Aging Test Report" September 5. ZTE said in its report that the GB and yd standards required ZTE issued a report called "Hammer T1 Mobile phone aging test Report rough solution," for Hammer Technology founder Luo September 5 issued the "Smartisan T1 accelerated Aging Test Report" was interpreted. ZTE said in the report, GB and yd standard power supply keys and ...