webroot performance issues

that if we add the ondragfinish event of uiscrollview, the event will be executed twice. In addition, the call in lateupdate has a significant delay. The interval between the two ondragfinish events is longer. I personally do not need to "drag" The effect, I will put the ondrag in lateupdate Remove. No bugs have been found. 2. Bug of ondragscrollview: In the same way, we can implement a page flip screen. However, the general design is that the uidragscrollview component is one page. But what i

Notes on performance issues 1. Too many object declarations. Description: Declare the dataaccess layer object in the rule-layer function. Declare a rule-layer object in the system-layer function. Example: Class pricesystem { Private Static pricesystem m_pricesystem = NULL; Public static pricesystem getinstance () { Lock (typeof (pricesystem )) { If (m_pricesystem = NULL) { M_pricesystem = new p

installed, you should change the parameters to make it more beneficial to your project's use Modify data Buffer parameters: The data cache is to load the disk information into memory, read the memory faster than the disk speed, should be appropriate to improve the data buffer. Modify the personal sort area parameter: When the data needs to be sorted, more than the provided memory space, part of the data in the sorting area, and part of the disk area, after multiple memory and disk exchange, to

parameters: When a database is installed, you should change the parameters to make them more useful for your project Modify data Buffer parameters: The data cache is to load the disk information into memory, read the memory faster than the disk speed, should be appropriate to improve the data buffer. Modify the personal sort area parameter: When the data needs to be sorted, more than the provided memory space, part of the data in the sorting area, and part of the disk area, after multiple memor

Sometimes, when we update the data, we find that the update time is very long, we usually think that the performance of the query is very slow, is caused by the index. But sometimes, triggers can also cause performance problems.We need to disable the trigger and then restore it when we update the data1 -- Disabling triggers 2 TRIGGER on Table 3 -- enabling triggers 4 TRIGGER on tableView CodePerformance

, which avoids longer locking of the system tables.25. Avoid using cursors as much as possible, because cursors are inefficient and should be considered for overwriting if the cursor is manipulating more than 10,000 rows of data.26. Before using a cursor-based method or temporal table method, you should first look for a set-based solution to solve the problem, and the set-based approach is generally more efficient.27. As with temporary tables, cursors are not unusable. Using Fast_forward cursors

analysis. The following script will help us list a session that has opened a transaction but is not active, that is, open a transaction, but no statements have been executed for the last 30 seconds.1 /*****************************************************************************************2 STEP 4:list The Open session with transaction which are not active3 ****************************************************************************************/4 SELECTes.session_id,5 Es.login_name,6Es.host_nam

iOS Development UI Chapter-uitableviewcell performance issuesFirst, some introduction of UITableViewCellEach line of the UITableView is a UITableViewCell, initialized by DataSource's Tableview:cellforrowatindexpath: method to initialize each rowThere is a default child view inside the UITableViewCell: Contentview,contentview is the parent view of the content displayed by the UITableViewCell, which displays some auxiliary indication viewsThe work of th

Recent game discovery, in order to save the HTTP request, put many groups of animation on a picture, that is, the legendary sprite, but the drawimage from the image to draw a portion of the canvas will be very slow.My picture size is 5000*7000Ctx.drawimage (img,0,0,100,100,0,0,100,100)It's going to take 125 milliseconds . [Environment: Win10 chorme Version 44.0.2403.125 cpu:amd A8 gpu:hd8750] Solution:Take the required frames first and save them.var imgbuffer={};for (var i in This.texturemap) {T

with Heap Space. Solution: Adjust the-xmx, if large enough to debug-refer to the following debug HEAP The vicious circle of garbage collection- Note: This is almost the most common phenomenon Phenomenon:JVM does not correspond, memory basic consumption, analysis GC log, will see spent a long time to do FULLGC, released a bit of memory, and quickly need to FULLGC, such as 10 seconds to do fullgc,1 seconds and then need to FULLGC and then 10 seconds to complete FULLGC, repeated

Handling performance issues like CSDN downloads "Welcome to the discussion."

PHP Performance (memory) issues

displayed - /** the * Returns yes for hidden status bar, no opposite the */ the-(BOOL) Prefersstatusbarhidden the { - returnYES; the } the @endThe idea of cache optimization :(1) First go to the cache pool to find if there is a cell that satisfies the condition, if there is, take it directly.(2) If not, create a cell yourself(3) Create a cell, and set a unique tag (the one that belongs to "" to cover a chapter)(4) Set data to cellNote the point :Defining a variable to hold the value of the

Example: Use Curl to view all time-consuming information:$ Curl-o/dev/null-s-W%{time_namelookup}::%{time_connect}::%{time_starttransfer}::%{time_total}::%{speed_ Download} "\ n" "http://www.baidu.com"0.004::0.008::0.015::0.015::162425.000The Curl parameter is detailed:-O: Writes Curl output All label information to the garbage collection station/dev/null-S: Remove all attributes-W: Outputs the result according to the expression style provided in the following paragraphTime_namelookup:dns Resolvi

during the comparison. After all comparisons, two variables record the minimum and minimum values of the corner mark. Finally, the data of the 0-point data in the array and the 4-point data are exchanged directly. This idea compared to the previous problem-solving, carried out a pre-bedding. In fact, I think that the process of thinking, the operation is also quite a lot. The number of comparison records has been increased, and the number of exchanges has been reduced. The two variables are sto

, Mkdir/var/redis3.0/log6, Mkdir/var/redis3.0/log7, mkdir/var/redis3.0/63798. CP redis.conf/etc/redis3.0/6379.confmodifying configuration ItemsDaemonize YesPidfile/var/redis3.0/run/redis_6379.pidLogfile/var/redis3.0/log/redis_6379.logdir/var/redis3.0/6379Runredis-server /etc/redis/6379.conf至于具体的配置细节，我还没有进行具体的配置、在接下来会配置两台先试试我的想法，具体测试效果也待验证。第一次写,算是篇日志吧，原来一直看大家写，今天也把写一下，发现写篇真的很不容易，以上的安装过程我还是参考园友（基本上是照抄）的。账号已经5年多点了，时间啊真正的快啊。安装步骤参考：http://www.cnblogs.com/haoxinyue/p/3620648.htmlCentOS installation re

tested before the conclusion.In addition, see SqlServer2014 (SQL 2014 new feature Introduction series-In-memory OLTP (In-memory OLTP)) also made a large adjustment, basically support memory storage, can be asynchronously quickly stored in memory, the scheme for the current device, I'm afraid it won't work.Other, later in the search process learned how to achieve a copy, copy the scene of the application Mode (actual combat).To replace SQL Server with Oracle:This program I also want to go to do

-efPS auxPS aux output formatUSER PID%cpu%MEM VSZ RSS TTY statstart time COMMANDUser: Process OwnerPid:pid%CPU: CPU Usage consumedVSZ: Memory usage consumedRSS: The amount of virtual memory consumedTTY: Whether the program executed for the login, if Tty1-tty6, is the native login, if the pts/??, is a remote login.STAT: Status of the program, R: In progress, S: Sleep, T: detecting or stopping, Z: Death programStart: Program start timeTime: When the program runsCommand: the command executed.======