Reason analysis and countermeasure of slow opening speed of website

Intermediary transaction SEO diagnosis Taobao guest Cloud host technology Hall

Reason one, you use a lot of JavaScript special effects.

For example, the mouse effect Ah, the column on the page special effects ah, the status bar special effects Ah, and so on. The principle of these effects is to download the server to your local machine, then run it on your local machine and then you can see it. Special effects do more, on your local machine will be running for a long time to complete, and if your machine configuration in general, it is even more slow, even if all the special effects are running complete, your page will be very uncomfortable to use.

JavaScript brings more than just slow speed, there is also a very important point is that most people use it does not know how it is written, just copy from other stations to use, one in the process of circulation, there will be lost part of the code of the situation, the result you copy over may be wrong or incomplete code, This can cause your website to be paralyzed; Secondly, if there is a prank to disguise malicious code as a special effect code to you, and you do not understand, the copy to the site, then not only you open your site will be victimized, others open your site is also likely to become victims.

Therefore, it is recommended to use less JavaScript effects (three special effects), otherwise it will be harmful to your site. If you want to use it to choose a more secure special effects code, to a better site to copy, do not go to assorted station.

Reason two, you use on the page with the large unprocessed picture.

The image can be processed to make the number of bytes smaller, otherwise many of the pictures in the beginning will occupy a lot of space and make the site open slowly. Use Photoshop, fireworks and other drawing software to reduce the size of the picture.

Reason three, your page has flash or video files.

Many netizens like to do on the homepage of their station to do Flash animation, song, or live television, film and so on. In fact, this will make your page open the speed of greatly slow. Although Flash can be downloaded while playing, but often because of network reasons, can not be downloaded smoothly, the result of your page will always be waiting for the download status, and can not be successfully completed. Movie and TV Live is worse, they usually go through a short period of time Buffering and downloading to start playing, if the network is not good to download and play. Therefore, it is recommended that you use less large flash, less video live (preferably not).

Reason four, too much reference to the content of other websites

This also includes your reference to other sites of pictures, audio and video files, etc., but also include all the content of your reference to other sites. If you directly refer to something else on the page, and the site is slow, or the page of that site is no longer there, you will be slow to open it.

Reason five, you will be in other places to apply for some domain name to your own website

In general, if the top-level domain name directly points over, that will not have a great impact on speed. However, there are a number of free applications in other areas of the domain name, it itself is very slow, and after several turns, the speed is even more slow.

Reason six, your station may have the wrong code. Find the error code to correct it!

Reason seven, the system has the virus, especially the worm virus, consumes the system resources seriously, does not open the page, even freezes.

The worm virus which is distributed through e-mail is more and more serious and harmful to the network speed. The virus causes infected users to keep sending emails as soon as they surf the internet, and the virus chooses random documents in the user's personal computer to attach to the random address of the user's phone book. Hundreds of such spam messages are queued to be sent out, and some are returned to heap on the server in batches. Cause individual backbone of the internet appears obvious congestion, network speed significantly slowed down, so that the LAN nearly paralyzed. Therefore, we must upgrade the anti-virus software in time, the computer also need to upgrade in time, install the system patch, while unloading unnecessary services, shut down unnecessary ports, in order to improve the security and reliability of the system.

Reason eight, the server itself is not enough bandwidth, slow speed.

Reason nine, own server bandwidth enough, give you limit too dead, slow.

The reason is ten, the user and the website is in different network segment, telecommunication, Netcom, move, railcom these lines cause slow speed. For example, your server in telecommunications, you use netcom access.

The reason is that your database is so big that you can't bear it.

Reason 12, are some rogue plug-ins make.

Reason 13, network firewall settings do not allow multithreading access, such as the current WinXPSP2 on this default to do the restrictions, the use of multi-threaded download tool has been greatly limited, BT, thunder are so. Therefore, opening too many pages at the same time can result in slow opening of the Web page.

Reason 14, the local network speed is too slow, too many computers share the Internet, or share the Internet users have a large number of downloads will also appear to open the Web page slow problem.

Why, there are bugs in the browser you use, for example, some beta versions of multiple window browsers can also be slow to open pages.

Reason 16, visit the website load is too heavy, the bandwidth is too narrow, the program design unreasonable, also can appear to open the page slow problem.

Reason 17, network intermediary equipment problem, line aging, virtual connection, router fault.

Reason 18, whether and the system flaw is related, also is not good to say, the shock wave and so on virus is spreads through the flaw and causes the system to slow even to paralyze.

Reason 19, network cable problem leads to slow speed

We know that twisted-pair wires are tightly twisted and together by four pairs of lines to reduce crosstalk and background noise. At the same time, only 1, 2 and 3, 64 lines of twisted pair are used in the T568A standard and the T568B standard, where 1, 2 are used for sending, 3, 6 is used for reception, and 1, 2 must come from a winding pair, 3, 6 must come from a revolve pair. Only in this way can the maximum avoid crosstalk and ensure data transmission. In practice, I found that not according to the correct standard (T586A, t586b) The production of network cable, there are a lot of hidden dangers. The performance is: one kind of situation is when starts to use the network speed is very slow, the other kind of situation is starts the net speed to be normal, but after some time, the net speed slows down. The latter situation is evident on desktop computers, but the speed at which the computer is checked with a laptop is normal. For this problem I have been found for many years, due to not according to the correct standard made by the network cable caused by slow speed and the quality of the network card. General desktop computer network card performance is not as good as notebook computer, therefore, in the use of the Exchange method to troubleshoot, the use of notebook computers to detect the normal speed of the network does not rule out the existence of the problem. We are now required to press T586A, t586b Standard to suppress the network cable, in the detection of faults can not be used in lieu of desktop computers.

Reason 20, the network exists the loop to cause the net speed to become slow

This phenomenon rarely occurs when the number of nodes involved in the network is not many and the structure is not very complex. However, in some more complex networks, there are often redundant lines, such as inadvertently connected to form a circuit. For example, cable from the network Center to a computer room, and then from the computer room to the second room computer. At the same time from the network Center and a standby line directly connected to the computer room two, if the several lines connected at the same time, the formation of the circuit, the packet will continue to send and verify data, thus affecting the overall speed. This is a difficult situation to find. In order to avoid this situation, we must be in the laying of the network of good habits: network cable marked on the label, there is a standby line of the place to do a record. When this type of failure is suspected, the method of partition segmentation is generally adopted.

Reason 21, network equipment hardware failure caused by the broadcast storm caused by slow speed

As the main means of discovering unknown devices, broadcasting plays a very important role in the network. However, as the number of computers in the network increases, the number of broadcast packets will increase dramatically. When the number of broadcast packets reaches 30%, the transmission efficiency of the network will decrease obviously. When the NIC or network device is damaged, the broadcast packet will be sent continuously, causing the broadcast storm and paralyzing the network communication. Therefore, when the network equipment hardware failure will also cause slow speed. When you suspect such a failure, you can first replace a hub or switch with a replacement to troubleshoot a hub device. If these devices do not malfunction, turn off the hub or switch power, DOS under the "Ping" command to the computer involved in one test, to find a faulty network card computer, replace the new network card can restore normal speed. Network adapters, hubs, and switches are the most likely devices to cause slow internet speed.

Reason 22, a port in the network has formed a bottleneck resulting in slow speed

In fact, routers WAN and LAN ports, switch ports, hub ports, and server network cards can become network bottlenecks. When the speed is slow, we can use the network management software to view the data traffic of routers, switches and server ports during the peak period, and can also use the netstat command to count the data traffic of each port. This confirms the location of network data flow bottleneck and tries to increase its bandwidth. Many specific methods, such as replacing the server network card for 100M or 1000M, installing multiple network cards, dividing multiple VLANs, changing the router configuration to increase bandwidth, etc., can effectively alleviate the network bottleneck, can maximize the speed of data transmission.

Reason 23, excessive use of firewalls

Excessive use of the firewall can also lead to slow speed, processing methods Needless to say, uninstall the unnecessary firewall to retain only a powerful enough.

Reason 24, insufficient system resources

You may have loaded too many applications running in the background, please load the software reasonably or remove the useless programs and files, empty the resources to achieve the goal of increasing the speed.

Reason 25, network equipment hardware failure caused by slow speed

Regular cleaning of dust inside the chassis

Reason 26, unreasonable page Layout cause Web page open speed

For example, this is a problem: My site is on its own server, is in the opening of the first page, the head soon opened, but the middle part to pause, about 3-5 seconds of time, is in the test is also such a problem, is not I call JS too much, or I call the label too much, I am using the popular version of the template modified page, can you tell me the reason? This is caused by too much content in the same table. The solution is to use a multilevel table in a Web page (from top to bottom in a Web page, not nested in the same large table) to store content.

The solutions are:

1, to Sina Assistant, with IE strong repair, immediately you can see the effect. Or your own speed is slow.

2, press Start-run, input gpedit.msc, pop-up Group Policy window, first select Computer Configuration on the left-management module-Network-qos Packet Scheduler, and then select the right limit to retain the bandwidth on the right button, select the properties, in the pop-up window setting "Enabled" to change "bandwidth limit" to 0% , this can speed up the download speed, the Web page open slow and machine configuration also has a certain relationship, cleverly set up some organs, can also improve the speed of machine operation, improve Web access speed. Here are some possible ways to do this: first, clean up the disk and defragment the disk.

1. In My Computer window, right-click the letter you want to clean-"properties"-"Clean disk"-Check the file you want to delete-ok-yes.

2. Clear temporary files, start-run-input%temp%-OK. 3, with the optimization master or Super Rabbit clean up the registry and garbage files.

4, close some Start program, start-run-msconfig---start, in addition to anti-virus software, input method outside the general procedures can be turned off.

5, remove the program software.

6, defragment the disk--start--All Programs--attachment--System Tools--Disk Defragmenter--Selected C analysis--defragmentation.

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