java performance tuning tips

}%{request_filename}!-d Rewriterule. *%{document_root}%/index.php #RewriteRule. */index.php The last commented out rewrite configuration is not good because it will be one more time per request SyscallStat64 ("/index.php", 0xbfab4b9c) =-1 enoent (No such file or directory) three, Apache log problemWhen we test a problem, we find that if the custom log has recorded the access time and other information, there will be a lot moreStat64 ("/etc/localtime", {st_mode=s_ifreg|0644, st_size=

by the system. For example, System.arraycopy () can be 9 times times faster than handwritten copy on a JIT-capable machine.1.9 Use the native method with caution. Native is more efficient than Java. The most important use of the native code is on Android, based on existing native code.Some tips in development1.http with gzip compression, set the connection time-out and response timeoutThe HTTP request is d

using a 64-bit Java heap space above 10GB. Multiple GC policies, despite this, still not finding the right acceptable level of performance?appropriate vertical and horizontal scaling, including the creation of JVM processes on each physical host and across multiple hosts to meet the overall throughput and capacity, compared to the current JVM specification. If you break the list of applications in several

web| Program | skills | performance The simplicity of using asp.net to write Web applications is unbelievable. Because of this simplicity, many developers will not spend time designing their application structures for better performance. In this article, I'll describe 10 tips for writing high-performance WEB applicatio

there is no need to optimize unless you feel it can make your code easier to read (and Final,static,static final is more true)Frequently measuredBefore you start optimization, make sure you have some problems to solve. Make sure you can measure your existing performance accurately, otherwise you won't be able to measure the benefits of the alternatives you're trying toEach statement in this article has benchmarks, and the source code for the benchmar

ready to run, waiting for the available CPUs, and if the number of lightweight processes that are ready to run exceeds the limit that the system can handle, the run queue is long and the running queue length indicates that the system load may be saturated.When the system runs at a queue length equal to the number of virtual processors, the user does not noticeably experience performance degradation and the system responds very slowly when the queue l

users emit multiple servers.23. Code checking and optimization via FxCopFxCop is a code analysis tool that uses a rule-based engine to check out the non-canonical parts of your code, and you can customize your own rules to add to this engine. Some of these rules are: Avoid excessive local variables Avoid using private code that is not called Avoid internal classes that are not instantiated Avoid the use of unsealed features Avoid unnecessary casts Initialize a stati

Java performance analysis tools, Part 1: Operating System Tools, java operating systemsIntroduction The premise of performance analysis is that the running status of the application and the running environment of the application are displayed more directly in a visual manner. How can we achieve this visual display? We

Java is a widely used software development platform, and it is of great practical significance to learn the optimization methods for Java programs. Java Program Performance optimization: Make your Java program faster and more stable with

web| Program | skills | performance | skills | Performance This article discusses: Common myths about ASP.net performance Useful asp.net performance tips and tricks Some suggestions for processing databases in asp.net Buffering and using ASP.net for background processing Thi

Like all relational databases, MySQL seems to be an elusive monster. It will stop at any time, limit the application to stagnation, or put your business at risk.In fact, many of the most common errors are hidden behind MySQL performance issues. In order to ensure that your MySQL server is always running at full speed, it is important to provide consistent performance and eliminate these errors. However, the

jsperf to test a method of speed, do not be in the dead, local conditions, to avoid falling into the small optimization and pay too much energy.About rendering you can use some skeleton diagrams to improve the user experience.Some ideas As for the performance experience, you can actually imagine building a house, which would be more time-consuming if it was the entire refurbishment, but would improve per