imac performance comparison

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

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

-handsome rich use.Interested friends, you can pick up the phone to sweep, to see how your phone test situation, with a sticker.COCOS2D-JS:Createjs:Summary:Overall, because Cocos2d-js can be rendered on WebGL, performance is better than Createjs. Compared to the rendering on canvas 2d, Createjs and Cocos2d-js are not alike, not much difference, especially in mobile phones (Android) is basically a waste, mobile phone's canvas2d game/animation can only

: 41788.55 requests per secondINCR: 41823.50 requests per secondLPUSH: 36179.45 requests per secondLPOP: 41067.76 requests per secondSADD: 41823.50 requests per secondSPOP: 41305.25 requests per secondLPUSH (needed to benchmark LRANGE): 41254.12 requests per secondLRANGE_100 (first 100 elements): 17618.04 requests per secondLRANGE_300 (first 300 elements): 6311.94 requests per secondLRANGE_500 (first 450 elements): 4240.16 requests per secondLRANGE_600 (first 600 elements): 3283.75 requests per

Article title: FirefoxJavaScript performance comparison: Wine is also better than Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. TuxRadar.com is a website for Linux enthusiasts. it is not blindly superstitious, but thinks that Linux also has many shortcomings to

This article mainly introduces the performance comparison of using in_array () foreacharray_search () in php to find whether an array contains data. if you need to know whether a character contains an array, there are many ways to solve this problem. new users who are just learning php tend to use loops to solve the problem. for small websites, this solution will not cause any major problems. However, in te

[Rumor Terminator] PHPforforeachwhile has better performance than my female friend who told me: Oh, well, I 'd like to hear other people say that the best foreach in php should not use for, because the performance will be better. my first reaction was that it was impossible. The second reaction was to think about why others had such a conclusion. I guess some of my children's papers use the following form f

) Edit Test Script file Test1 (test native piece of disk) hd=default,vdbench=/var/www/html/vdbench504,user=root,shell=ssh sd=sd1,lun=/dev/vdc,openflags=o_direct,threads=1 wd=wd1,sd=sd1,xfersize=16k,readpct=0,seekpct=100 rd=rd1,wd=wd1,iorate=max,elapsed=120,maxdata=5500g,interval=1,warmup=30 Test native two disk (and so on) hd=default,vdbench=/var/www/html/vdbench504,user=root,shell=ssh sd=sd1,lun=/dev/vdc,openflags=o_direct,threads=1 sd=sd2,lun=/dev/vdb,openflags=o_d

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,

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