profiling java code

Java profiling toolJProfilerIt can be integrated with a variety of IDES and application servers. This article mainly introduces jprofiler andIntelliJ IDEA Integration. 1. Choose Session> IDE integrations from the main menu of JProfiler. It is worth noting that IntelliJ IDEA needs to be disabled when the plug-in is installed. If you run the installation program through the JProfiler Installation wizard, you

C compiler profiling _ 5.2.3 intermediate code generation and optimization _ access array elements and struct members through "offset" Section 5.2.3 accesses array elements and struct members through "offset" In the previous section, we introduced the access to "array elements and struct members". We use the "base address + offset" mode to calculate the address of the memory unit. For the array element arr2

C compiler profiling-managing the register for generating assembly code In a computer, the CPU speed is much faster than the memory speed. The compiler should make full use of register resources to reduce unnecessary access to the memory, this increases the speed of the compilation code generated by the compiler. In the intermediate

string "charger" to save it to the Is_charger variable, is_charger non 0 indicates that the previous android was started in charge mode, otherwise normal mode. The normal startup mode is different from the process that the charging mode needs to start, and the difference between the two modes to start the specific program will be described in init.rc parsing.Next, call the info macro to print a log statement, which is defined in Init/log.h and is implemented as follows#define ERROR (x ...) Kl

Generated codeTestConcoleApp.Program.test ()Push ESIPush EAXmov DWORD ptr [ESP],ECXCMP DWORD ptr ds:[0ab2dd8h],0Je 00d0010b (jump to XOR Esi,esi here)Call mscorwks! CORLAUNCHAPPLICATION+0X108B4 (7a08e179)XOR Esi,esiNopMOV esi,43hMOVZX Ecx,siCall mscorlib_ni+0x2f8b9c (793b8b9c) (System.Console.WriteLine (Char), mdtoken:06000759)NopMOV ecx,43hCall mscorlib_ni+0x2f8b9c (793b8b9c) (System.Console.WriteLine (Char), mdtoken:06000759)NopMOV esi,1Pop ecxPop esiRetHere, movzx ecx,si This instruction cor

]: Module ' Foobar.b ' from ' Foobar/b.pyc '>inch[ One]: sys.modules[' Foobar.b ']out[ One]: Module ' Foobar.b ' from ' Foobar/b.pyc '>inch[ A]: sys.modules[' B ']---------------------------------------------------------------------------Keyerror Trac Eback (most recentPager Last) input- --1Df8d2911c99>inchModule> ()---->1sys.modules[' B ']keyerror:' B 'We know that the imported modules will be added to the sys.modules dictionary. When we import modules, can be easily divided into the followi

of the parameters in parentheses. The parameter interpretation recognizes local and global variable names, constant values, branch targets, and compare oper Ators.As you can see, in the while 1 here (line 3rd), Direct is the jump_absolute instruction;And while true here (line 5th) consists of load_name and pop_jump_if_false directives.Original true in Python2 is not a keyword, just a built-in variable, bool type, the value is 1, that is, true+true output 2.It can also be assigned value. Fo

of all given fields 10 Hmset key field1 value1 [Field2 value2]: Set multiple field-value (domain-value) pairs to the hash table key at the same time. 11 Hset key field value: Sets the values of field fields in the hash table key to value. 12 Hsetnx key field value: Sets the values of the hash table field only if the fields field does not exist. 13 Hvals key: Gets all the values in the hash table 14 HSCAN key cursor

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.com/en-us/magazine/ee309515.aspxSOS Debugging Extension:http://msdn.microsoft.com/en-us/li

STL source code profiling algorithm stl_algo.h -- merge sort ---------------------------------------------------------------------- Description: Merge Sorting. Ideas: 1. Semi-segmentation of intervals 2. Sort the Left and Right segments separately 3. Use inplace_merge to merge left and right segments into a complete ordered sequence Complexity: O (nlog n) Source

STL source code profiling algorithm stl_algo.h -- inplace_merge Inplace_merge (used in ordered intervals) -------------------------------------------------------------------- Description: if the two connected sequences [first, middle) and [middle, last] are sorted, Then inplace_merge can combine them into a single sequence, which is still ordered. Source code:

....... ...... ...... ..... ...... ..... ..... ..... ... .......... ....... ....... ...... ...... ...... ... .......... ....... ....... ...... ...... ...... ... .......... ....... ....... ...... ...... ... ... ... This is very critical data, because when you have problems with GC, such as over GC, memory leaks, and so on, you will be able to use the thread's native ID values associated with the operating system or Java thread, and then find any

key value in the tree, header-> right 1.4. Set \ Multiset Both set and Multiset use RB-tree as the underlying data structure, and both use RB-tree related interface functions to implement their own functions. In addition, the two have the automatic sorting function ..The key value and real value are the same. The only difference between the two is that the operation of the Set element inserts uses the underlying mechanism RB-tree insert_unique (), while the latter uses insert_equal (). 1.5 map

= This.configuration.getTypeHandlerRegistry (); }At this point, the data source creation ends. Let's take a look at how to use it.Third, detailed1. Mybatis DataSource Structure2. MyBatis JNDIMyBatis Jndi has been analyzed before the source code, which is not analyzed here, the original link: Click to open the link3. MyBatis unpooledMyBatis unpooled The idea of creating a data source, first create a data source factory with the default construction m

STL source code profiling algorithm set Set AlgorithmsBytes ------------------------------------------------------------------------------------ Description: Set_union, set_difference, set_intersection, set accepted by set_symmetric_difference algorithm, It must be an ordered interval. It is applicable to set/multiset with RB-tree as the underlying layer and not to hash_set/hash_multiset with hash as the u

STL source code profiling algorithm stl_algo.h -- random_shuffle Random_shuffle Certificate -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Description: sorts the elements of [first, last) at random. Ideas: Must be RandomAccessIterator 1. Traverse intervals 2. Generate a random number

STL source code profiling algorithm stl_heap.h Heap------------------------------------------------------------------------- Binary heap is a Complete binary Tree. Implicit representation: tree is expressed in array. Tip: Keep the #0 element of array, and the left and right subnodes of element I are 2i and 2i + 1, respectively, The parent node is I/2 --> STL does not use this trick. Changing the size of a

MyBatis openSession (), close (), and commit () underlying code profiling, mybatisopensession I. What did openSession do in the MyBatis tool class? Mybatis tool class 1 private static final String RESOURCE = "mybatis-config.xml"; 2 private static SqlSessionFactory sqlSessionFactory = null; 3 private static ThreadLocal First, open openSession to find a method for implementing sqlsessionFactory. 1 package o

STL source code profiling algorithm stl_algo.h -- pre_permutation Pre_permutation---------------------------------------------------------------- Description: gets the first permutation and combination of the sequence marked by [first, last. If no value exists, false is returned. If yes, true is returned. Ideas: From the back to the front 1. Find two adjacent elements, set the left-side element to * I, and

single instance class client Although the single design pattern is the simplest design pattern shown in the figure below, it presents a number of flaws for unwary Java developers. This article discusses the single case patterns and reveals those flaws. Note: You can download the source code for this article from resources. Single case Mode In design pattern, the author describes a singleton patter