Performance Comparison of Oracle Database date filtering methods
Performance Comparison of Oracle Database date filtering methods
When developing SQL statements, filtering date segments is a common problem. How can we efficiently filter out date segments? This article demonstrates through experiments:
Method 1: Use
In the following url: http://www.bkjia.com/kf/201111/112209.html saw the use of ms cl, gcc, Intel icl, PGI pgcc and Codegear bcc several different compilers compiled C/C ++ program performance comparison, the conclusion is that Intel has the highest compiler performance.
Migrate the code in this Intel SDK to C # for comparis
improved.B. MongoV2.6.4 as the lock conflict changes, its read-Write throughput trends:Scenario: This was tested on my own development machine, with 10 concurrent read and write threads tested, and the horizontal axis represented: The ratio of locks (time of lock wait/read/write Transaction completion)Results: The results show that the overall throughput decreases with the increase of lock waiting ratio.C. MongoV2.6.4 test the performance
This article illustrates the comparison and analysis of file_get_contents and curl performance in PHP. Share to everyone for your reference. Specifically as follows:
In PHP if not careful to analyze performance will find that file_get_contents and curl two have a lot in common, they can collect file open file, but if a careful
strncpy () performance difference 4 times times, snprintf () and strncpy () performance difference of about 2.5 times times.
4. Using O3 optimization of different function consumption time comparison:
Copy Code code as follows:
david@u1110-hp:~/wrk/tmp/cstring$ Gcc-std=c99-o3-o test_snprintf TEST_SNPRINTF.C
david@u1110-hp:~/wrk/tmp/cstring$ Gc
This is a creation in
Article, where the information may have evolved or changed.
The serialized library is often used in the environment of network transmission, RPC, database access, and its performance directly affects the performance of the whole product.This article lists several high-performance go language serialization libraries and tests their
To the photographic enthusiasts to share a detailed analysis of Canon SX60 HS and Canon 60D performance comparison.
Compare and share:
Canon SX60 HS uses 1/2.3 inch CMOS sensor, with 65 times times optical zoom lens, the equivalent focal length of 21 to 1365mm, Aperture f/3.4-6.5, with optical stabilization function, with DIGIC 6 image processor. and Canon 60D with a valid pixel of 18 million aps-
The article uses the graphic detailed introduction in PHP about include and include_once and require and require_once Performance Map, the need for friends can be detailed to see, but overall include_once and require_ Once performance is much better, especially when multiple calls are made.
PHP Performance Optimization Eighth phase function, include () and includ
ADO. NET, and nhib.pdf is about two times slower.
Given that the average system read operation frequency is much higher than the write operation frequency, the average performance of NBear should be much better than that of nhib.pdf.
The test is not complete. It is for reference only.Read Performance Comparison
Repeat Times
ADO. NET (MS)
NBear (MS
Performance Comparison of include single files and multi-files: require_once and include are the two most common functions for PHP programmers. through these two functions, we can use the classes and other objects defined in other class libraries. However, many users simply use the following code to reference other files in the same directory.
Include performance
(Timeunit.milliseconds)); SYSTEM.OUT.PRINTLN (result); }}3. Test resultsRun the above test on the 4-core [email protected] machine, after several measurements, basically around the following range of values, the test data is as follows:1. Directget 100000000 times using Notoginseng ms2. Reflectasmget 100000000 times using ms3. Javareflectget 100000000 times using 222 ms4. PropertyGet 100000000 times using 335 ms5. Beanutilsget 100000000 times using 20066 ms4. Results Analysis1.
Introduction
In distributed system, we widely use message middleware to exchange data between systems, and facilitate asynchronous decoupling. Now open source message middleware has a lot of time ago our own product ROCKETMQ (Metaq core) also smooth open source, get everyone's attention.
So, what is the performance of message middleware?
With this in doubt, our middleware test group performs a performance
Label:Performance comparison test for MySQL 5.6 and MariaDB-10.0time 2013-02-14 10:11:34 Open source China Original http://www.oschina.net/question/12_90065 ThemeMariaDBOLTPTesting Technology Oracle has just released the MySQL 5.6.10 GA version, so it's time to update the previous performance test data, which includes the following versions:
MySQL-5.5.29
MySQL-5.6.10
mariadb-5.5.28a
Ma
Connection: http://www.oschina.net/question/29420_138135 See a blog post about Golang and PHP performance comparison, here to reply.The results of this test are clearly misleading. 1,php The Opcache is not turned on, read the disk file every time. and compile php for opcode. Performance naturally will be poor, open opcache try it. 2, Php+redis must be extended
-numeric value to a numerical value. For example, PHP can perform this operation: 100 "zhoutang ", the result is 100. it is precisely because it is a weak type language, coupled with detection and conversion before the operation that leads to low performance of arithmetic operations.
PHP's time for a single operation is relatively stable, and the time spent on every 10000 arithmetic addition operations is about 3.5 ms.
Different calculation methods al
To the photographic enthusiasts to share a detailed comparison of Canon SX60 HS and Nikon D7100 performance comparison.
Analytical sharing:
Canon SX60 HS can shoot the effect of smooth 60 frames/sec Full HD short film, while in the record format using a larger compression than the MP4 format, can effectively reduce the volume of video files, e
Reasons for upgrading PHP5: Performance Comparison between PHP4 and PHP5. PHP4 will not be supported by PHPGroup by the end of this year, so I did this test to make everyone more confident to transfer to the PHP5 platform, let's see if PHP4.x is true. PHP 4 is no longer supported by PHP Group by the end of this year. so to make everyone more confident, I did this test, check if PHP 4.x has a better
How does the Fork/join framework behave under different configurations?Parallel streams in Java 8 are also mixed. The syntactic sugar of the parallel stream (Parallel stream) is exciting. There are many ways to implement concurrent programming in Java, and we want to see what the performance gains and risks are. After more than 260 tests to get the data to see, or add a lot of new ideas, here we would like to share with you.Executorservice vs. Fork/jo
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