postgresql performance comparison

Detailed description of inlcude () performance comparison in php. The two most common functions for PHP programmers are require_once and include. through these two functions, we can use the classes and other objects defined in other class libraries. However, many users use the require_once and include functions most commonly used by PHP programmers. through these two functions, we can use the classes and ot

comparison test, found that several parameters of the setting of EXP export time-consuming impact, after optimization, EXP export performance has been greatly improved, But compared to EXPDP, the latter is still much faster, and the following is an introduction to the experiment and related knowledge so that we can refer to it when we help the user to develop a backup strategy.2. Test Situation2.1 test Env

I talked with others about the performance of linq yesterday. I feel that the performance of linq is not good, but in fact it is still outstanding in terms of performance, except for the ability to write data to SQL, the following is a simple performance test comparison code

I talked with others about the performance of LINQ yesterday. I feel that the performance of LINQ is not good, but in fact it is still outstanding in terms of performance, except for the ability to write data to SQL, the following is a simple performance test comparison code

This is a creation in Article, where the information may have evolved or changed. Company to restructure a statistical project, statistics section to provide a web interface, because the statistical system of log volume is very large, so the performance requirements of the Web service is very strict, in the context of technology selection to do the Golang and Java performance

Smarty is the most classic template engine in the PHP language, and if you've ever developed a PHP program, you've used it more or less. Smarty released its third edition in 2010, Smarty 3 was reconstructed with the latest PHP5. It retains the original syntax and adds some more modern features. Twig is a developer from Symfony, twig the author to position it as a fast and powerful modern template engine. Twig has many features similar to Smarty 3, but slightly different to improve

To the photographic enthusiasts for detailed analysis to share the Canon A4000 is and Canon 7D camera performance comparison. Analytical sharing: Canon A4000 IS's lens uses the three-stage telescopic design, the equivalent 35mm focal length is 28-224 millimeters, 8 times times Optical Zoom, can take the maximum resolution 4608x3456 photograph, the 720P shuangse Qiu net High definition short film,

Five paging stored procedures based on SQL Server and Performance Comparison In SQL Server database operations, we often use stored procedures to implement paging processing of the queried data to facilitate browsing by viewers. Create a database data_Test: Create database data_Test GO use data_Test GO create table tb_TestTable -- create a table (id int identity (1, 1) primary key, userName nvarchar (20) no

Recently, compare the query performance of xpath and JCR-SQL2 in jackrabbit, although JCR no longer recommends the use of xpath from version 2.0, but in terms of the query performance, XPath seems much higher than the JCR-SQL2 The following are the comparison results. Test environment: Jackrabbit 2.2.7 Windows 2003 4 GB memory AMD athlon (TM) II X4 640 3.01 GHz p

Comparison of paging Performance Using Stored Procedures 1. Generate table Create Table [t_user] ( [ID] [bigint] identity (1, 1) not null, [Name] [nvarchar] (50) Collate chinese_prc_ci_as not null, [Birthday] [datetime] not null constraint [df_user_birthday] default (getdate ()), Constraint [pk_user] primary key clustered ( [ID] ) On [primary] ) On [primary] Go 2. Generate 1000000 Database volu

After I published the article "Performance Comparison of Self-increment fields and guid field primary keys used in the Database", I got a lot of comments from my friends in the blog Park, we have also proposed some improvement methods for my testing methods. What surprised me was that a garden friend proposed that the test sequence of guid and ID should be reversed and the results should be viewed. Let's te

Performance Comparison between PHP5.2.16 and PHP5.4.9 hardware environment: Server: DL180G6 nbsp; (16 nbsp; Intel (R) Xeon (R) CPU nbsp; nbsp; E5620 nbsp; @ 2.40 GHz) nbsp; performance Comparison between nb PHP 5.2.16 and PHP 5.4.9 Hardware environment: Server: DL180G6 (16 Intel (R) Xeon (R) CPU E5620 @ 2.40 GHz

compare their time efficiency. View sourceprint? Function getmicrotime () { List ($ usec, $ sec) = explode ("", microtime ()); Return (float) $ usec + (float) $ sec ); } // Record start time $ Time_start = getmicrotime (); // Put the PHP code to be executed here, for example: // Echo create_password (6 ); // Record end time $ Time_end = getmicrotime (); $ Time = $ time_end-$ time_start; // Output the total running time Echo "execution ti

Serialization Framework performance Comparison (Kryo, Hessian, Java, Protostuff)Brief introduction: Advantages Disadvantages Kryo Fast, small volume after serialization More complex cross-language support Hessian The default supports cross-language More slowly Protostuff Fast, based on PROTOBUF Static compil

Performance comparison (transfer from http://www.linuxidc.com/Linux/2012-07/66404.htm)I knew it was more efficient to use set in Python, but I didn't think there was such a big gap:~$ python-m Timeit-n "[x for X in range (+) if x in range (500, 1500)]"Loops, Best of 3:28.2 msec per loop~$ python-m Timeit-n "set (range). Intersection (range (500, 1500))"Loops, Best of 3:120 usec per loopThe List is about 225

Here in order not to modify my previous article, re-paste the previous codeSelectsort quickSort comparison#include Run./out 100000Output Result:s:11630.885 msq:42.877 ms100,000 data sorting, both performance has been quite obvious. The selection sort uses 11.6s, and the quick sort only uses 42.9msSelect sort and quick sort performance

times, physical read 0 times, read 0 times, LOB logic read 0 times, lob physical read 0 times, lob read 0 times.Table ' Verifyprocess '. Scan Count 9, logical read 3,136 times, physical read 0 times, read 0 times, LOB logic read 0 times, lob physical read 0 times, lob read 0 times. The performance of this example looks like the total time overhead difference is not obvious, because the number of connected tables is small, and if the number of tables

Conclusion: Comparison of MyISAM and InnoDB test results (average) 1.517853328 Space: InnoDB is 1.5 times times the size of MyISAM 1 Based on index query: the difference between the two is very fast 3.78712652

Mainstream Java Web containers are tomcat, JBoss, Jetty, and resin. We used jboss4.0.5 in the past, but the servlet container used by jbosse is Tomcat 5.5. Therefore, we only compare Tomcat and jetty, you only know. Resin is not mentioned. It seems that it has become history.I. Tomcat Now the tomcat version is 8.0, and many new features are added in Tomcat 6 and 7. Version features Tomcat7 Series Tomcat6 SeriesIi. Jetty Due to jetty's poor birth, unlike tomcat, which grew up under the powerful

In, Microsoft's Rico Mariani made a comparison between the performance of C # And C ++ in actual application. The things originated from Microsoft's Famous Veteran Raymond Chen (the super cool-man who is admired below) who wrote an English-Chinese dictionary program in C ++ to describe the process of optimizing the C ++ program. He started from a simple and intuitive version of the code and continuously tes