golang profiling

Implementation of tabhost through ViewPager + Fragment for android project profiling In the project, you need to use the navigation bar on the end bar. sliding or clicking it will switch to the view above, This effect is implemented using Viewpager + Fragmen, which is a mainstream solution. If you do not know much about fragment before joining us, you can first read Fragment of android (Official Website documentation translation) The entire file is

handle the Click Event of a log. This is done by reloading the onlistitemclick method,@ Override Protected void onlistitemclick (listview L, view V, int position, long ID ){ Uri uri = contenturis. withappendedid (getintent (). getdata (), ID ); String action = getintent (). getaction (); If (intent. action_pick.equals (Action) | intent. action_get_content.equals (Action )){ // The caller is waiting for us to return a note selected // The user. The have clicked on one, so return it now. Setresu

not improve efficiency, but will reduce efficiency, because there is a lock upgrade process, this time will need to-xx:-usebiasedlocking to disable the biased lock. Here are the comparison of these types of locks: Lock Advantages Disadvantages Applicable scenarios Biased lock Locking and unlocking does not require additional consumption, and the execution of a non-synchronous method is less than the nanosecond-level gap. If there

for a few daysBooting the kernel moduleThe kernel modules are loaded in detail according to the files under the/etc/modules.conf file or the/ETC/MODULES.D folder.Executing scripts at different execution levelsDepending on the level of execution, the system executes the corresponding script in RC0.D to RC6.D, completing the corresponding initialization and initiating the corresponding service.Executive/etc/rc.d/rc.localYou assume that you have opened this file with a word in it, and after readin

problem is very easy. Which is the 32-bit assembly on the 64-bit machine running to solve the problemAt the beginning of the corresponding assembly code, add a. code32OkSame. Will encounterHead.s:105:warning:using '%ebx ' instead of '%bx ' due to ' l ' suffixThis will change the corresponding BX register to ebx OKHead.s:248:error: '%al ' not allowed with ' MOVL 'Head.s:257:error: '%al ' not allowed with ' MOVL 'This changes the MOVL to MOVB. This should be a mistake. Rather than a platform diff

order in which the columns are displayed. A-Z in the lower case moves the corresponding column to the right, while the uppercase A-Z moves the corresponding column to the left. Finally, press ENTER to confirm.Press the uppercase F or O key, and then press A-Z to sort the process by the appropriate column. The uppercase R Key can reverse the current sort.command to useTop Use FormatTop [-] [d] [P] [Q] [C] [C] [s] [s] [n]Parameter descriptionOther useful commandsThe following are some of the inte

and Helloword will print several times? 8 times int Main () { Fork ()// produces two process branches Fork ()///Two processes generated in front of each will produce two processes, four processes fork (),//4 processes generated in the preceding process will produce two processes, a total of eight processes print (" Helloworld! "); /Eight processes so print eight times return 0;}To have the parent process generate 10 processes, enter how many processes to generate, and how many laps eac

structure, and the following function uses FD to find the corresponding file structurefile = Fget_light (fd, fput_needed); Find the corresponding file structure--------------------------------------------------------------loff_t pos = file_pos_read (file); Read FoPs, file pointer position-------------------------------------------------------------- ret = vfs_read (file, buf, Count, pos); Call Vfs_read The most useful are:if (file->f_op->read)ret = file->f_op->read (file, buf, Count, POS); Find

the use of virtual functions, I specially prepared ctest for ADDREF2,DOIT2,RELEASE2, three identical but non-virtual functions, To follow a major principle of performance testing: compare Apple to Apple.I set the loop to 100,000, and the test results showed that the LOOP2 was about 20% lower than the LOOP1 speed. The only difference from the generated code is that the CTest constructor calls the constructor of the compiled auto-generated ITest1. This constructor has no effect, but White takes u

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

In the previous article, I resolved the exception handling in the service invocation process and the shutdown of the service proxy by using delegate method. Readers of WCF Technical Profiling (Volume 1) should know that in chapter 7th I solved similar problems through an AOP approach, and now we're going to discuss the solution. What will happen if the service agent cannot be closed in time? , we know the importance of closing the service agent in ti

Spring MVC source in-depth profiling execution process Spring MVC is now the most popular MVC framework, and many people say it is an excellent framework. In essence, because spring MVC joins annotations, annotations make spring MVC qualitative, which makes development efficiency soar. And it is a small part of spring itself, so let's not like Struts2, need plug-in support. In other words, they are seamlessly connected. But no matter how good the fra

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

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

in-depth study of your child's shoes with SQL Server. Learn together and progress together.At the end of the article gives the previous several connections, the following content basically covers our daily write query operation decomposition, it seems necessary to sort out a directory ....SQL Server Tuning Series BasicsSQL Server Tuning Series Basics (Summary of common operators)SQL Server Tuning Series Basics (Union operator summary)SQL Server Tuning Series basics (Parallel operations Summary)

Introduction to MySQL performance optimizationWhat is performance optimization? In fact, we tend to define from a broad sense that the non-functional optimizations of a MySQL system will be considered performance optimizations, such as the stability of the database server, the number of SQL queries executed per second, the scalability of the system, CPU utilization, and so on, as the performance optimizations of MySQL.I personally agree with this book that MySQL performance optimization should r

{color:blue}The text in this form will also turn blue.In CSS, inheritance is a very natural behavior, and we don't even have to consider whether we can do it, but inheritance has its limitations.First, some properties are not inherited. There is no reason for this, just because it is set up, as is the standard. For example: Border attribute, we all understand that the function of the border property is to set the border of the element, it has no inheritance. If you inherit the border property, t

]: 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

Profiling SSTI in Flask/Jinja2 AnalysisPart 1 If you have never heard of a server template injection (SSTI) attack, or do not know much about it, you are advised to read this article written by James Kettle before continuing to read this article. As a security practitioner, we are helping enterprises make risk-based decisions. Because risks are the product of influences and attributes, we cannot calculate the corresponding risk values correctly withou

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