the default is 8m, but the file size is less than 8m. It is not clear how much size should be set for buffering. Should it be less than or equal to the file size? Because downloading files is a batch operation and batch files, you should also take into account the memory consumption of frequently creating buffers.
BufferedInputStream maintains an array in user space to reduce the number of times an application is trapped in the kernel, such as a 15m file. If your buffer size is 3m, it will be trapped into the kernel 5 times, if the buffer size is 8m, then it will be trapped into the kernel twice, if the buffer size is 16m, then you only need to trap once, although reducing the number of times the kernel will be trapped (both will serve as a buffer) But increased memory consumption, and there will be a possibility of waste (for example, the above 16m, actually only read 15m, then wasted 1m), so it is up to you to weigh the buffer size. For example, it doesn't matter if the memory is enough. Of course, the bigger the buffer, the better. For example, if 80% of your files are about 6m on average, you can set 6m, considering batch operations. The frequent application and recovery of the buffer will lose part of the performance, so the buffer pool technology can be used to avoid the reuse of the buffer. The horizontal coordinates of echarts are not specifically marked, and the X coordinates do not have a grid to indicate. Here is a figure that specifies . js * * createChartSix() { this.$http .get(this.$api.dataChart) .then(rsp => { ...
sincerely ask for advice: < hr > I want to use node as the background to build a video streaming server. The front end is similar to Youku VOD. It can record the playback node function, and load the progress bar at any point (starting from the c...
I need to implement in a chained promise function, any function error in the middle terminates the program, and can catch the error function, and then perform different operations according to different error functions. How can the following code be imp...
I would like to ask what is wrong with this code. Thank you for your answers. ...
is doing a question on Niuke.com. I encounter a problem: to achieve the function callIt, after the call meets the following conditions 1, the returned result is the result after calling fn 2, and the call parameter of fn is all the parameters after th...
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description: a regular match is given to the content of an input box, and the matching content is the product activation code. looks like this: "0C31-0B81-BB32-3094-0C31-0B81-BB32-3094 " Code: $( -sharplicenseCode ).keyup(function () { le...
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I got a set of data, which is to choose the type of question. How can I tell if I have chosen the right one answera: "Olympic Games " answerb: "Asian Games " answerc: "Paralympic Games " answerd: "University Games " id: "1772 " question: "f...
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what does the code circled in the following picture mean? ...