how to make dsl faster

This article mainly introduces a way to make file downloads faster in PHP, that is, using the X-SendFile header, which is supported by servers with active traffic, in general, we can direct the URL to a file under the Document Root to guide users to download the file. However, in this way, we can't do some statistics, permission checks, and so on. so, in many cases, we use PHP for forwarding to provide use

future use of HTTP/2, this is its era!SummarizeCreating a responsive, mobile-friendly site is more popular with Google crawlers than modifying the details of a style or label. These are the details that need to be considered by the mobile side, and if they are ignored, it can obviously seriously slow down your site response and even lose the user experience you deserve. Fortunately, we have a number of free tools available to evaluate the responsiveness of mobile sites.Now, get started and go d

'); This is much faster because it does not have to traverse the entire DOM. Just find #class-container. Create a cache Don't make mistakes that keep picking the same thing over and over again. You should cache the elements you are dealing with as a variable. Not to repeat the same element in one cycle! This affects speed very much! Copy Code code as follows: $ (' #item '). CSS (' c

search without using the index on the column; If these results are obtained during query compilation, they can be optimized by the SQL optimizer and indexed to avoid table search. Therefore, rewrite the SQL statement as follows: Select * from record where card_no like '000000' (Select * from record where amount Select * from record where date = '2014/1/01' ( You will find that SQL is getting faster! 2. For example, the stuff table has 200000 rows and

CPU bus mode is the Fast bus mode, the CPU would operate by the hclk*/. EquHDIVN,0. EquDIVN_UPLL,0. EquPDIVN,0LdrR0, =clkdivn LDRR1, = (divn_upll3) + (hdivn1) + pdivn StrR1, [R0] LdrR0, =upllcon LDRR1, = (u_mdiv A) + (u_pdiv4) + U_sdiv StrR1, [R0]NOP NOP NOP NOP NOP NOP NOPLdrR0, =mpllcon LDRR1, = (m_mdiv A) + (m_pdiv4) + M_sdiv StrR1, [R0]2 Test InstructionsWe still use the same as the previous post of the same LED water lamp C program, but because the CPU operating frequency

Ubuntu16.04 update the kernel-using more than 4.6 of the kernel will make the Dell computer with a card faster-and uninstall excess kernel, ubuntu16.044.6 Tips: I am a Dell a-card computer. I feel less fluent than fedora when using 16.04 desktop. Later I manually upgraded to the 4.6.2 kernel and found that I can perform smooth operations with fedora and windows desktops. I have tried the development version

' (13 seconds)Select * from record whereAmount/30 Select * from record whereConvert (char (10), date, 112) = '000000' (10 seconds)---- Analysis:---- Any column operation results in the WHERE clause are calculated by column during SQL Execution, so it hasThe index on the column is not used for table search. If these results are obtained during query compilationIt can be optimized by the SQL optimizer and indexed to avoid table search. Therefore, rewrite the SQL statement as follows:Select * from

, the columns in the following SQL condition statements have an appropriate index, but the execution speed is very slow: Select * from record where Substring (card_no, 5378) = '000000' (13 seconds) Select * from record where Amount/30 Select * from record where Convert (char (10), date, 112) = '000000' (10 seconds) ---- Analysis: ---- Any column operation results in the WHERE clause are calculated by column during SQL Execution, so it has The index on the column is not used for table search. If

This article briefly introduces some techniques used to make Java code more efficient during code writing. 1. place some system resources in the pool, such as database connections and threads. in standalone applications, database connection pools can be implemented using some open source connection pools, such as c3p0, proxool, and DBCP. Applications Running in containers can use datasource provided by the server. the thread pool can use Java provided

, the columns in the following SQL condition statements have an appropriate index, but the execution speed is very slow: Select * from record where Substring (card_no, 5378) = '000000' (13 seconds) Select * from record where Amount/30 Select * from record where Convert (char (10), date, 112) = '000000' (10 seconds) ---- Analysis: ---- Any column operation results in the where clause are calculated by column during SQL Execution, so it has The index on the column is not used for table search. If

to do the task of planning inside. And it's free! Supports NTFS and FAT32, supports Windows xp/vista/win7 systems, and new versions support 64-bit systems. Defraggler's command-line version is too simple to use for system resources, without adding system services.I used to think I had to defragment it. The disk's free space should be much more, but I once found that there was a lot less space available after defragmenting the pieces. Later found that the software before the disk defragmentation

-040602.201606100516_amd64.deb Place the downloaded three Deb packages for your PC in one folder and execute the sudo dpkg-i *.deb to complete the installation later.Remove unnecessary kernels from your computer: (restart first)1. Review the list of kernel versions that are present in the system:sudo dpkg--get-selections |grep Linux2. View the current version of the kernel used by Ubuntu systemUname-a3. Remove the excess kernel:sudo apt purge linux-headers-4.4.0-27 linux-image-4.4.0-27-gene

with the plugin from eclipse, you do not need to install the plugin separately, in the following steps: 1.Open itEclipse→Windows→preferences →java → Editor→ content assistauto Activation triggers for Javazjava Click apply button; 2. continue to open JavaScript→Editor→Content Assist, modify Auto Activation triggers for the value of JavaScript is:zjs click the apply button; 3.Continue to openWeb→html Files→Editor→Content Assist, modifying Prompt When these characters is in

The examples in this article tell you how to make your PHP7 faster hugepage usage. Share to everyone for your reference, specific as follows: PHP7 just released RC4, including bug fixes and one of our latest performance gains (news), which is "hugepagefy PHP text segment", by enabling this feature, PHP7 will "move" its own text segment (actuator) To Huagepage, before the test, we can stable in WordPress se

YesThe use of Windows 7 has become a great joy for many computer users. Compared with the previous Vista system, WindowsThe 7 system is really nice, fast, and easy to use, but do you worry about your own Windows 7 system, just like installing other Windows systems, just as it just started to run fast, as time increases, the efficiency will decrease? It is not difficult to keep your Windows 7 system running directly. The following describes ten effective small methods to help you maintain the hig

Java is a widely used software development platform, and it is of great practical significance to learn the optimization methods for Java programs. Java Program Performance optimization: Make your Java program faster and more stable with Java performance Tuning as the main line, the knowledge and skills associated with Java performance optimization are systematically elaborated.　　Java Program Performance op