Js enables delayed loading of webpage images to increase webpage opening speed and js latency
There are many ways to increase the speed of webpage loading, using jquery. lazyload. js achieves asynchronous and delayed loading of images. For websites with a large number of images on the page, it is a good way to increase the speed of webpage opening. On the left side of the bar page of the Code official website, you can see an article thumbnail display
Problem description:
ProgramAfter the master database is updated, the data queried from the slave database does not change. It is suspected that the synchronization delay of the Master/Slave database is caused. Check the master-slave synchronization status from the database and find that seconds_behind_master takes more than one thousand seconds. Under normal circumstances, the latency of the Master/Slave database can be tolerated for more than 10 s
Latency
SetTimeout (Code, millisec): Used to call the function after the specified number of milliseconds [set latency]
VaR timeoutid = setTimeout (function () {alert ('pop up after five seconds ');}, 5000 );
ClearTimeout (timeoutid): Used to cancel the delay set by the setTimeout Function
Periodic call (timer)
SetInterval (Code, millisec): Used to call a function at a specified period (in milliseconds )
In the MySQL world, Haproxy is often used as a software load balancer. Peter Boros explains how to use the Percona xtradb cluster (PXC) to set it up in a previous message. So it only sends the query to the applicable node. The same method can be used for general master-slave settings to read the load and spread across multiple nodes. However, with MySQL replication, another factor starts to work: replication latency. In this case, the mentioned Percon
threads of 99 delay data, where the main output of the information is concentrated in RPS and average latency, where the average latency is multiple threads concurrent request sever processing data after the average time of each thread. In addition there is a place to pay attention to, for scan words, a scan100, all our final statistics RPS is in the statistical number of good to 100 as the approximate RPS
external paging program FSBUF (used by the JFS2 file system). In addition, there are psbuf, which are fixed memory buffers used for I/O requests to paging space.
In Figure 2, the vmstat-v command displays a value that is the average since bootstrap. Because the server may not reboot for a long time, be sure to take two snapshots in a few hours to check for changes in these values. Here, they grow fast and need to be tuned.
I/O Latency
In the vmsta
Label:Original: SQL Server 2012 alwayson--Specifies a data synchronization link to eliminate commit latency issues caused by network jitterEvent Cause: Recent research and development reaction, a database from 08 to 12 environment, the occurrence of write operation delay problem;Event Analysis: After troubleshooting problems such as system resource contention, preliminary analysis may be caused by network jitter that causes the synchronization mode Al
Label:To perform the show slave status from the server, you can view many of the synchronized parameters, and we need to pay special attention to the following parameters:The name of the primary server binary log file that is currently being read by the I/O thread in Master_log_file:slaveRead_master_log_pos: In the current primary server binary log, the I/O thread in slave has already read the locationRelay_log_file:sql the name of the trunk log file that the thread is currently reading and exec
This article mainly introduces jQuery's implementation of sliding menus with delayed effects, which involves the skills of jquery mouse event operation page attribute regular conversion and has some reference value, for more information about how jQuery implements sliding menu code with latency, see the examples in this article. Share it with you for your reference. The details are as follows:
This is a jQuery-based sliding menu. Move the mouse over
Learning EF from laziness and delayed loading (2), ef latency
By studying EF greedy loading and delayed loading yesterday, it is not difficult to find that delayed loading is still very useful, but the problem also arises. Sometimes we only need to load one entity, there is no need for external entities related to it. In this case, let's take a look at how EF works during Delayed loading.
Open profiler
Write a query at the entrance of the Main functio
click event processing function will not be executed.
Code attached:1var timerClick = null;2 // Click Event proxy3 function _ onNodeClick (id ){4 // onNodeClick is the real Click Event Processing Function5 timerClick = window. setTimeout ("onNodeClick ('" + id + "')", 220 );6}7 // double-click the event processing function8 function _ onNodeDbClick (id ){9 if (timerClick ){10 window. clearTimeout (timerClick );11}12}
The above content does not trigger the onClick event when onDbClick is tri
This article mainly introduces the implementation method of JS delayed prompt box, and analyzes in detail the principle and specific implementation steps of JavaScript to implement the delayed prompt function in the form of examples, which has some reference value, for more information about how to implement the JS latency prompt box, see the example in this article. We will share this with you for your reference. The details are as follows:
Prompt b
Latency injection exists on important sites of the pull Network
Punch card
GET /wangpiao/checkCinema.php?robId=46filmid=59674 HTTP/1.1Host: m.lashou.comUser-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3Accept-Encoding: gzip, deflateCookie: td_cookie=924922937; ThinkID=ske83b5kkskrq1t3c0gro9m001; c
Paip. Solution to sound latency
Author attilax, email: 1466519819@qq.com
A Selection box for opening a file has a button sound... but the button sound delay is very high. It will only sound when the box comes out, more than a second ..
The method of releasing the code to throw the thread does not solve the problem.
Sleep between playing and opening openfiledialog. thread. Sleep (200); basically OK, but it will slow down the speed of opening the fi
/* Paste the code of the cool. The code you write is ugly. Don't mention how disgusting it is... type: Line Segment tree + latency tag + interval merge... */# include
Tuning Parameter
How?
MTU size to maximum supported by Network
Leave at default
interrupt moderation
disable: ethtool-C
RX-usecs-IRQ 0
TCP/IP checksum offload
Leave at default
TCP segmentation offload
Leave at default
TCP large receive offload
disable using sysfs: Echo 0>/sys/class/NET/ethx/device/LRO
TCP protocol tuning
Leave at def
the loaded code:
Linqdbdatacontext DB = new linqdbdatacontext (); DB. deferredloadingenabled = false; // false indicates loading string Path = server. mappath (@"~ /Log/log.txt "); streamwriter Sw = file. appendtext (PATH); dB. log = Sw; // loading mode immediately (the following three codes must be added; otherwise, the student information cannot be found) dataloadoptions DL = new dataloadoptions (); dl. loadwith
The output result is the same as the preceding one, but let's look at the log
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.