Memory Map Technology
Memory map was a technique that maps the contents of a file to the virtual address space of a process. There are the following aspects to the memory map technology of txt-files: * * 1. Concept Understanding ** 1. * * Basic Principles ** - A one-to-one correspondence is established between the location of the txt-file on the disk and an area of the same size in the process logical address space. After the map, an object similar to an array type (such as mmap.mmap () object, etc.) is obtained. The contents of the file can be changed like an array. - In the windows system, the memory-map file provided a memory management method that allowed applications to access the txt-file on the disk through the memory pointer, just like how they accessed the file loaded into memory. This process allowed all or part of the contents of the disk file to be associated with a certain area of the virtual address space of the process, so that the file could be directly accessed without performing file I/O operations and without the need to buffer the file contents. This feature was suitable for managing large-sized txts. 2. * * Compared to traditional reading methods ** - The traditional way of reading txt-files, for example, using the streamreader in C#to read it out at once, then using the memorystream to store it in memory, and then using the streamreader to read it out line by line, although the speed was faster when processing a certain size of the file (such as 16M text, about 8 seconds), it might be insufficient for processing large files. The Memory Map technology could reduce the buffer operation of data in memory when processing large files, improving efficiency. * * 2. Operation Method ** 1. * * Operation example in C#** - You can use methods related to the MemoryMappedfile class, such as the Create From file method to open a txtfile, and then use the Create View Accessory method to extract the corresponding content according to the position of the text. You can extract it according to the number of words (for documents with English or numerical symbols, it can save resources). However, extracting by blocks might destroy the entire line of content in the document. The solution was to determine the position of the line break near the block according to the line break, and divide the large file into blocks reasonably. You can also combine the Task () thread group to assign a task to each block for related processing. During the operation, you can choose the action without return value or the Fuc with parameters with return value to operate. In addition, you can also use the streamreader to operate on the opened txt-file. The operation process involves the management of the file stream, the location of the target line and the current line, the determination of the file size, and the creation of the memory map view stream. At the same time, when reading the content, it also involves operations such as the conversion of strings and byte-arrays. * * 3. Memory-Mapped I/O Characteristics ** 1. * * Strengths ** - When dealing with txts, many I/O-intensive operations could be completed faster because there was no need to copy data between the core space and the user space. And in some cases, such as when the sqlite-library processes txts (if it is treated like a database file), using memory-mapped I/O may require less ram because it shares pages with the operating system's page buffer and doesn't have to always maintain a copy of its own working page. 2. * * Disadvantage ** - There may be a risk of a program crash, such as the inability of sqlit to capture and handle I/O errors on memory-map files. Moreover, the operating system must have a unified buffer to work properly. Not all operating systems met this condition. In some operating systems that claimed to have this function but had a flawed implementation, it could cause file corruption. In addition, memory-mapped I/O does not always improve performance. In some cases, it may reduce performance. For example, in the windows system, the memory map file's interception function is limited. When performing some operations such as reducing the file size, it may silently fail and leave unused space. It may also cause incorrect database corruption reports (under certain versions of sqrite). Read more exciting novels for free
Wu Zhu's injury novel
In Joy of Life, Wu Zhu had been injured many times. After the battle of Dong Mountain, the Qing Emperor's power was supreme. Later, Wu Zhu came out of the Temple and charged into the Royal Palace to fight with the Qing Emperor. In the process, Wu Zhu was heavily injured and was knocked to the ground by the Qing Emperor. Fan Xian and Fan Ruoruo joined forces but were unable to kill the Qing Emperor. In the end, the Qing Emperor was curious about the secret Wu Zhu had set up. After removing the black cloth, he was shot to death by the beam in Wu Zhu's eyes. However, Wu Zhu was also heavily injured and almost crippled. At the end of the story, he recuperated on Dong Mountain. In Joy of Life, it was mentioned that Wu Zhu was injured for the first time in 20 years because the Dharma protector did not respect martial ethics and used firearms. In addition, before the battle with the Qing Emperor, Wu Zhu had also been injured. His body was very special. Every time he was seriously injured, some of his memories would be lost. He even had to risk returning to the Temple to recharge his batteries. He often disappeared for no reason. Sometimes, he found people to fight, and sometimes, he returned to the Temple to heal himself.
Xiao Ding's complete audio novel
Xiao Ding's audio novels included many versions of Celestial Bane. For example, Liang Shuang's New Storytelling, Celestial Bane, had 11.059 million views; there was a free trial version of Celestial Bane, which had 3.604 million views; Mu Jiu's premium multi-person audio drama, Celestial Bane, had 48.52 million views; there was also the 3D radio drama, Celestial Bane (Season 1), and so on. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What's the name of the movie, fighting with Pikachu?
In the Hollywood live-action movie Detective Pikachu, Tim Goodman (Justy Smith) and Detective Pikachu teamed up to embark on an adventure and fight side by side during the investigation. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The hottest novel recommendations to make up for regrets
A few novels to recommend: "My wife, don't look back, I'm really your husband today!" Gu Feixue wrote a Xianxia Cultivation novel. The male protagonist Xia Xuan's family and friends were of extraordinary status. He did not pretend to show his cards and had many other identities. This book was also known as 'Immortal Cultivation by Fate: Borrowing a Mother from a Hot Shot at the Beginning' and had many characters. Mending the Heavens was an oriental fantasy novel written by Han Wu Ji. The female protagonist, Rong Huiqing, had to face all kinds of situations on her bumpy path of cultivation. Her background was complicated and tragic. Her childhood playmates were very cheap, but she became stronger step by step. This was the eldest daughter's main story. Although there were some flaws, the plot was not bad. Rong Huiqing's background was about to be revealed. She seemed to be related to Nuwa, and there were also wonderful contents such as Nuwa's new version of mending the sky. " I've returned from God's Space." It was a novel about the infinite universe. Reincarnator wanted to live a simple life but failed. His writing style and idea were good. He could fatten up his words before reading. Doomsday Restorer, a sci-fi doomsday crisis novel. The cosmic storm changed the world in three minutes. The electrical civilization was destroyed, and humans turned into zombies. I read it when I was in university. Although it's a bit outdated, I still want to recommend it. " Perfect Rebirth " was Ye Shisan's urban novel. Demigods did ordinary things in the world. The ending was short but overall good. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The lyrics of the three most popular songs of longing
The following are the lyrics of the three popular songs in "Everlasting Love": ** 1."Everlasting Lovesickness"(Xiaoyao's theme song)** Break the riddle of fate, see the world's vagrant, love's fate is difficult to escape. I put myself out of the matter, lowered my eyes and eyes, only looking at my heart, not listening, not guarding, loving you. Every night, under the lonely moonlight, the past is like smoke rising, and memories are full of you. It gathered the unruliness and unruliness between heaven and earth. In every moment of loneliness, it filled the air with longing. There is only you in the world, exchange for pride and hold hands for a lifetime. Sending a heart to leave, asking for a return date, those endless days were thrown to time. Sending a person to travel, wanting a chance encounter, waiting for the rain to fall in those endless places of longing. ** 2."Prefer Worldly Firework"(ending song)** (Unable to provide exact lyrics due to lack of information.) ** 3."The Waiting That Can't Be Seen"(Xiangliu's theme song)** The moon shines on the sea, the moon shines on the sky, and the clothes are better than the snow Mountains and rivers smile, eyes like stars Lovesickness dyed with love, Gu bones engraved with heart inscriptions Waiting for the snow to fall, waiting for fate to fall in love, waiting for your life to come I can't wait for my longing, I can't wait for the flowers to bloom The waiting that I can't wait for The nine songs of the world of mortals are filled with love and suffering Tenderly deep, I promise you that every sound is a seal, a confinement The heart is like a floating map, each scene is the way back and forth Life is like dancing in the snow, step by step, it's lonely The moon shines on the sea, the moon shines on the sky, and the clothes are better than the snow Mountains and rivers smile, eyes like stars Lovesickness dyed with love, Gu bones engraved with heart inscriptions Waiting for the snow to fall, waiting for fate to fall in love, waiting for your life to come I can't wait for my longing, I can't wait for the flowers to bloom The waiting that I can't wait for The nine songs of the world of mortals are filled with love and suffering Tenderly deep, I promise you that every sound is a seal, a confinement The heart is like a floating map, each scene is the way back and forth Life is like a snow dance, step by step it ends Had he not watched enough of Long Lovesickness 2? Hurry up and read the original work of "Everlasting Lovesickness 2: A Vow of Love"!
The author of the novel, the prodigal son of the border town
I recommend a few great novels! " The Heavens of Money " was a novel created by the confused Yu Zai. The innate spiritual light and the greedy people accompanied each other to form the Heavens of Money, and the protagonist who walked the path of commerce was very novel. The reviews were not bad. The Legend of the Marvel World, written by Yu Shangui. When the superhero was defeated by Thanos, Hao Wan appeared. He brought the League of Legends system to Marvel and could give himself and others heroic abilities. The Avengers style changed suddenly and the character setting was very interesting. 'I'm from Miaoxing' was a new sci-fi novel by the prodigal son of the border town. The universe's origin energy and technology coexisted, and the poor youth on the remote exiled planet faced a life and death crisis. The author had nine excellent works, and his writing style was good. This book was about the struggles of small characters. Although there were small flaws, it was worth reading. Invincible Black Gun was a novel written by the prodigal son of the border town. Ye Ershuang's movements were so cool that he became the Black Gun King. The plot was funny, and the characters were vividly portrayed. Although it was a routine, it was novel. It was a classic in online games. " I Want to Be a Store Manager, But I Become a Sword Hero " was a light novel written by a cat, not a dog. Hirata Sansei's soul traveled to Tokyo to save the martial arts store, but he eventually became a sword saint. The story was very interesting. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
A novel clip of his wife being a teacher in another city
I can't answer your question. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Thirteen lines: Rise of the novel Ah Pu
The 13th Line, Rise, was created by Ah Pu. The story of " The Rise of the Thirteen Lines ", written by Ah Pu, was based on the real history of the Thirteen Lines. It was about the story of the hedonistic son Wu Chengjian, who led the Wu family to the Thirteen Lines and became the richest man in the Qing Dynasty with the help of the wise advisor Zhou Yijin. This novel was quite readable. The plot was full of ups and downs, the characters were vividly described, and the grasp of human feelings and the state of the world was very good. It took a popular path that emphasized the importance of reading, combining the elements of palace conspiracies, secret room schemes, merchant tactics, scholars, and so on. It made the story both full of ups and downs of the family and full of interest. Ah Pu had published 17 books and had a wealth of creative experience. When he wrote " The Rise of the Thirteen Elements," he displayed his own creative characteristics, ingeniously combining various elements to show the complicated relationship between the thirteen families. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Which medicines contain Chinese herbal medicine, Fangfeng
The Fangfeng Tongsheng Pill contained Fangfeng. It was a Chinese patent medicine made from a variety of traditional Chinese medicines. Its main effects were to relieve the exterior and clear the interior, clear heat and detoxify. It could be used to treat a variety of diseases caused by external cold and internal heat. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Which novel is the protagonist of Chen Yang and Gu Yunfan?
He recommended a few novels. Warhammer 40K: Tara's collector, a novel written by the golden man. This world was dark and crazy. The Chaos Gods manipulated the fate of humans. Monsters devoured human flesh and souls. The flames of war were endless. However, the arrival of Gawain, the soul from another world, wanted to change everything. He told the evil freak that he wanted to collect its head. It was super cool. The Young Master of the American Pawnshop, a novel about urban life written by Lu Zhouzhou. The Chinese worker had transmigrated into a member of the American pawnshop family in 2016. He relied on his cheat to sell at a low price and at a high price. His character image was distinct and had various height, weight, age, and other settings. " Campus Rebirth: 1998 " was a modern romance novel written by the rabbit Su Qi. In 1998, Anyang was reborn. She had a space to make a fortune in business, had a puppy love, and finally got together with Mr. Mu. There were many supporting roles involved in her pretentious and exciting life. " I'm the common villain in novels ", a fantasy novel written by Big Fire and Little Chong. The main character had transmigrated into the villain of many novels. He had the intelligence to use the Fate-Defying Point System to take advantage of the main character. The counter-plot was super cool and worth watching. 'The Bands' Summer 'was a novel written by Gu Qu for an urban entertainment star. Ye Weiyang, a 30-year-old social animal, was reborn to play a band. He plagiarized, but the main band's angle was fresh. Although there were flaws, they could not hide the merits. He liked the theme of the band. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>