performance profiling

. I think that it's pretty useful if you are debugging the other developer's source code and you have no idea why this function is invoked. Let me know if you are not clear what I'm trying to explain about console. trace ();. #6. Timing (Measuring the time of your code) You can use console. time (timeName) function to measure how long a participant code or function take. This feature is very helpful if you are trying to improve the performance of your

In the first section of this chapter we also mentioned the performance bottleneck of using the query Profiler to locate a query, and here we describe in detail the purpose of Profiling and how to use it. To optimize a query, we need to know exactly where this query's performance bottleneck is, is it consuming too much CPU, or does it require too many IO operation

Sometimes we need to perform performance tests on software programs that we develop, and some profilers tools are needed. 5 useful. NET profilers are listed below:1. JetBrains DottraceJetBrains Dottrace is a. NET Apps performance and memory Profile tool. It lets you quickly detect your. NET 1.0 to 4.5 application performance bottlenecks.Learn more about the Dottr

Label:Original: SQL Server Tuning Series advanced (in-depth profiling statistics)ObjectiveAfter the analysis of the previous few, in fact, in general has been the first glimpse of the importance of SQL Server statistics, so this article will be sacrificed this artifact.This content will be very long, sit good bench, melon seeds snacks and so on ...No nonsense, go to the chase.Technical preparationThe database version is SQL SERVER2008R2, which is anal

common data structure, interface display elements, data collection and communication control mechanism in TPTP. It provides a range of extension points so that downstream projects can easily extend and reuse these features. Testing tools As a basic framework for building test tools, this subproject provides a common set of features for a test tool. Examples include reporting and analysis for implementation testing, preparation of execution environments, and test results. In addition, the proj

large problem is divided into multiple thread block processing, each block of the number of threads is not too small, like this article only 1 threads, which is a huge waste of hardware resources. An ideal solution is to divide n thread blocks, each with 512 threads, to decompose the problem, often more efficiently than a single thread parallel processing or a single piece of parallel processing. This is also the essence of CUDA programming. The above analysis of the

View the MySQL show profile (profiling Report) The show profil command is provided by MySQL to analyze the resource consumption of statement execution in the current session. It can be used for SQL optimization measurement. 1. Enabling and disabling Parameters 1.1 view parameters By default, the parameter is disabled and the result of the last 15 running times is saved. Mysql> show variables like 'profiling

Jstack (view threads), Jmap (view memory), and Jstat (profiling) commandsAn article shared by colleagues inside the companySee an example of using Jstack to view a deadlock on the weekend. Last night summed up the Jstack (view thread), Jmap (view memory), and Jstat (performance analysis) commands. For everyone's reference1. Jstack1.1 Jstack can get information on Java stack and native stack running Java pro

Tags: database file cache tables host IMG Base row exampleTo optimize a query, we need to know exactly where this query's performance bottleneck is, is it consuming too much CPU, or does it require too many IO operations? To be able to understand this information clearly, in MySQL 5.0 and the MySQL 5.1 official version can be very easy to do, that is, through the Query Profiler function. MySQL's query Profiler is an easy-to-use Query diagnostic analys

Python source code profiling note 1--python objects Work whole two years, with Python most, however for Python internal mechanism is not necessarily all clear, indulge in the simple logic of adding additions and deletions every day to write, really exhausting. Many things do not forget, such as C language, exactly, Python source code written in C, the analysis of Python source code at the same time can be warm C language Foundation, is really

In the process of developing Java programs, it is unavoidable to encounter problems such as memory usage, performance bottleneck and so on. The Java Profiler Tool helps developers locate these issues quickly and efficiently, making it an important tool in the Java development process. At present, there are a variety of Java Profiler tools in the market, this article will briefly introduce several kinds of tools that are common at present, and compare

Mysql uses profiling to analyze the causes of slow SQL statements. CleverCode colleagues recently recommended a mysql SQL statement analysis tool profiling, and found that this tool is very good, it can accurately analyze the specific time spent on SQL statements during the Query Process. CleverCode will be summarized here and shared with you. [Do not repost the original works of CleverCode in the csdn blo

VisualVM is a free, integrated visualization tool with multiple JDK command-line tools that provides you with powerful analytics and performance analysis and tuning of your Java applications. These features include generating and analyzing massive amounts of data, tracking memory leaks, monitoring the garbage collector, performing memory and CPU analysis, and it also supports browsing and manipulation on MBeans.In memory analysis, the biggest benefit

VisualVM is a free, integrated visualization tool with multiple JDK command-line tools that provides you with powerful analytics and performance analysis and tuning of your Java applications. These features include generating and analyzing massive amounts of data, tracking memory leaks, monitoring the garbage collector, performing memory and CPU analysis, and it also supports browsing and manipulation on MBeans.In memory analysis, the biggest benefit

Tags: mysql clip where SQL tool hid Targe overflow timeMySQL can use the profiling command to see how long it takes to execute query SQL.By default, MySQL is turned off by the profiling command:[SQL]View PlainCopy SELECT @ @profiling; +-------------------+| @ @profiling |+-------------------+| 0 |+-------

ObjectiveAfter the analysis of the previous few, in fact, in general has been the first glimpse of the importance of SQL Server statistics, so this article will be sacrificed this artifact.This content will be very long, sit good bench, melon seeds snacks and so on ...No nonsense, go to the chase.Technical preparationThe database version is SQL SERVER2008R2, which is analyzed using Microsoft's previous case library (Northwind), and part of the content is also applied to another Microsoft Case Li

Transferred from: http://www.cnblogs.com/zhijianliutang/p/4190669.html Conceptual understanding About statistics in SQL Server, as explained in Books Online Query optimization statistics are objects that contain statistics related to the distribution of values in one or more columns of a table or indexed view. The query optimizer uses these statistics to estimate the cardinality or number of rows in the query results. With these cardinality estimates, the query optimizer can create high-quality

Commercial:ANTS Memory Profiler:http://www.red-gate.com/products/dotnet-development/ants-memory-profiler/ANTS Performance Profiler:http://www.red-gate.com/products/dotnet-development/ants-performance-profiler/NET Memory profiler:http://memprofiler.com/JetBrains dottrace:http://www.jetbrains.com/profiler/download/index.htmlSciTech Memory profiler:http://www.scitech.se/Free:CLR profiler:http://msdn.microsoft.

Original: http://yalung929.blog.163.com/blog/static/203898225201212981731971/Introduction: The top command, as one of the most commonly used performance analysis tools under Linux, can monitor and collect CPU,IO , and memory usage of the process. For example, we can Use the top command to get how much virtual memory (VIRT), physical memory (RES), shared memory is used by a process ( SHR). Recently encountered a consulting problem, a product doing

Real time includes CPU times and waiting, switching, and so on, so it is generally larger than the CPU. Comparisons can determine if the time-consuming operation is within the CPU execution segment. C. The% of the above four indicators indicates the percentage of the function in total time. Easy to see the time ratio of a function. D. calls+recurcalls/total represents the number of external calls + recursion count/total number of times. You can see if the number of calls matches your expectat