redis performance tips

term) {return outputterm = Term.replaceall (_regex, _replacement);} After optimization: Private final Pattern _pattern = Pattern.compile (_regex);p rivate string transform (string term) {return outputterm = _patte Rn.matcher (term). ReplaceAll (_replacement);} 5. Cache it as much as possible if you canStoring the results in the cache is also a way to avoid excessive overhead. There are now several implementations of the LRU (Least recently used) cache algorithm.6. The Intern method of s

PHP Optimization for PHP optimization is mainly related to the main parameters of php.ini adjustment and settings, the following we will look at some of the php.ini in the performance of the larger parameters should be set. # Vi/etc/php.ini(1) PHP function disabled find:Disable_functions =This option can set which PHP functions are prohibited, PHP has some functions of the risk is quite large, you can directly execute some system-level script command

-end server processes the user's request and saves the user's session or caches, then when the user sends the request again, there is no guarantee that the request will still be processed by the server that saved its session or cache, if it is handled by another server. The previous session or cache could not be found.Workaround 1:You can modify the task assignment policy for the reverse proxy server, which is more appropriate for the user IP as the identity. The same user IP is handled by the s

selector (such as $ (' #id ')), a jquery object is generated. The jquery object is a huge object with many properties and methods that can take up a lot of resources. Therefore, create as few jquery objects as possible.For example, many jquery methods are available in two versions, one for jquery objects, and the other for jquery functions. The following two examples are the text that takes out an element, and all that is used is the literal () method. You can use both versions of the jquery ob

string ';Bad:$type = "mixed";$output = "This is a $type string";Good:$type = ' mixed ';$output = ' This is a '. $type. ' String ';3. Use the Echo function to output a stringUsing the Echo () function to print out the results is easier to read, and in the next example you can see better performance.Bad:Print ($myVariable);Good:Echo $myVariable;4. Do not use connectors in EchoMany PHP programmers (including me) do not know when to use the stench to output multiple variables, you can actually use

statement instead of the If/else statement will have better performance and the code is easier to read and maintain. Bad: if ($_post[' action ' = = ' Add ') { addUser ()} elseif ($_post[' action '] = = ' Delete ') { deleteuser ()} elseif ($_ post[' action ' = = ' edit ') { edituser ();} else { defaultaction ();} Good: Switch ($_post[' action ']) {case ' add ': addUser (); Break;case ' delete ': deleteuser (); Break;case ' edit ': edituser

request to a variable5. How to make jmeter reduce the resource consumption of presses (simulate more users)6. JMeter How to parameterize (read parameterized data from a CSV file)7. JMeter Distributed Testing (pros and cons)8. Jmeter BSF Processor9. Jmeter Discussion section, more discussion materials yoJmeter Tutorial Summary Listiv. Jmeter Source code and Jmeter build environment (want to do two development for Jmeter see)Eclipse build jmeter compilation environment documentation free download

="#00000000" android:scrollingCache="false" android:animationCache="false" android:smoothScrollbar="true" android:visibility="gone" />5. Reduce the depth of the item's layoutWe should try to reduce the item layout depth, because when we slide the ListView, this leads directly to the measurement and drawing, so it wastes a lot of time, so we should remove some unnecessary layout nesting relationships. Reduce Item Layout Depth6. Using ViewholderThis people should be ver

functionality consumes more resources, so if you can use string processing methods such as the STR_ series instead of regular, try to use the string processing method.4, the reference file using absolute path ... /etc relative directory references will cause the script to find the corresponding resource from the current directory when invoking the related resource, which is not as obvious as pointing directly to the target.5. use single quotes as much as possible for strings . Double-quoted str

Performance Tuning Tips any programming model has a common performance flaw, asp.net is no exception. This section describes some of the ways you can avoid performance bottlenecks in your code. 1. Disable session state when not in use: Not all applications or pages require session state based on each user. If you

In browsing through the web, the search box is usually the last hurdle that leads to user use. If your site contains a lot of features, features, design elements, products and services, and so on, the search box becomes an integral part of the site. The growth of the website often takes time. Of course, from the whole design and development process of the site, the design must be concise, with articles and comments, as well as informal site announcements, features and services, and so on. Howeve

;/*+leading (TABLE) */Takes the specified table as the first table in the join order./*+cache (TABLE) */When a full table scan is performed, the cache hint is able to place the retrieved block of the table in the buffer cache most recently used in the least recent list of LRUFor example:SELECT/*+full (BSEMPMS) Cahe (BSEMPMS) */Emp_nam from Bsempms;/*+nocache (TABLE) */When a full table scan is performed, the cache hint is able to place the retrieved block of the table in the buffer cache most re

-mm-dd hh24:mi:ss ') >= ' 2016-01-01 00:00:00 ' andTo_char (T.createtime, ' yyyy-mm-dd hh24:mi:ss ') Group BY To_char (T.createtime, ' yyyy-mm-dd hh24:mi:ss ')Order by count (1) desc;MySQL Implementation method:date_format+ GROUP by + order by; (Modify the second parameter in the Date_format to modify the precision to min or hour)Example: Select Date_format (start_time, '%y%m%d%h%i%s ') Isecond,count (ID) as icount from Mtable t whereT.start_time between ' 2017-06-01 00:00:00 ' and ' 2017-06-01

Although PHP is powerful, it does not have any disadvantages. Like other languages, it also needs to be updated and modified continuously in actual application compiling.Code, Until satisfied. Next we will share with you some tips on optimizing PHP code performance. PHP code performance optimization 1. Do not copy variables at will Sometimes, to make P

The following articles mainly introduce several tips for optimizing MySQL database performance, including selecting the most suitable field attribute and using JOIN) instead of subqueries (Sub-Queries), UNION is used to replace the content of the temporary table created manually. The following articles mainly introduce several tips for optimizing MySQL database

Tips for improving the performance of Android ListView How does ListView work? ListView is designed to meet requirements for scalability and high performance. In fact, this means that ListView has the following two requirements: Create as few views as possible; Only the child View that is visible on the screen. Understanding the first point is simple: creating a

PHP Performance Optimization Tips-generating highly optimized code PHP is a server-side scripting language that has developed many of the world's most well-known websites, including Yahoo and Facebook. The following are 6 PHP code, performance optimization techniques.1.upgrade PHP to the latest version ??? The simplest way to improve

Reference | reference Manual | skills | performance | Chinese InnoDB Chinese reference Manual---Dog dog (heart sail) Translation 9 Performance tuning tips (performance tuning tips) 1. If Unix top or Windows Task Manager shows the service's CPU occupancy rate less than 70%, (

I usually don't pay much attention to database-related things. I feel good to see this article: Speed Up SQL Server Apps Learn 10 useful tips and tricks that help boost SQL Server application performance-and streamline development and deployment as well The following are 10 tips:1) Replace COUNT (*) With EXISTS When Checking for Existence2) Be Careful When U

the nature of the method, and calling this method does not change the state of the object.28. The use of intrinsic get,set methods should be avoided wherever possible.In Android programming, the invocation of a virtual method has a lot of cost, more than the cost of an instance property query. We should use the Get,set method when we outsource the call, but it should be called directly when it is called internally.29. Avoid enumeration, use of floating-point numbers.30. A two-D array consumes m