Digital speaking, Shock: TP frame, php,html,php static page execution efficiency analysis and comparison!!
Recently intends to do a high-performance chat server, do not know how Thinkphp3.2 efficiency? So what is the efficiency of the framework? So the test.
Task: Reads 44 data from the database.
1, Tp3.2 Home->controler->indexcontroler->index ()
$m =m (' Login_log ');
$login _log_list= $m->select ();
$thi
, both E8 FC FF FF FF -4. This is the next command address minus 4, and back here. In fact, the 4 here is a marker effect. So we can unlock this topic: static links .Under a static connection we compile the main.c with the command and get a target file as indicated:This is MAIN.O, the target file starts with address 0x00000000, but does not know where it is when it encounters the Add function, it makes a to
Java record-90-in-depth analysis of static proxy ModeThe proxy mode provides a proxy for other objects to control access to this object. In some cases, a customer does not want or cannot directly reference another object, and the agent can play a mediation role between the client and the target object. The proxy mode generally involves three roles: 1. abstract role: Declares the common interfaces of real ob
; } } Catch(e) {//ie8,9 'll throw exceptions on certain host objects #9897 return false; } //OWN Properties is enumerated firstly //if last one was own, then all properties are own. varkey; for(Keyinchobj) {} returnKey = = = Undefined | |hasown.call (obj, key); },Isemptyobject MethodTests whether the object is an empty object (does not contain any properties).Example:// test whether an empty object // true// falseSOURCE Analysis:function (obj) {
YII source code analysis (-) and yii source code analysis
As the first show of source code analysis, I chose yii (reading as an example, not as an example). I won't say much about its praise, but I will go straight into the topic.
One, synchronized synchronous statement block:
Before introducing the synchronization statement block, do an experiment to verify that the order in which multiple threads call the same synchronization method is random.
Example one:
1) Mylist.java
2) Test:
It is visible that the code in the synchronization method is printed synchronously, but thread A and thread B are executed asynchronously, which may cause dirty reads. Look at the following example
What is BEAM?
A statement about the abbreviation BEAM
In the purpose of brevity, this article uses the abbreviation-beam of the tool name, which is simply the acronym for the tool's "Checking Tool for Bugs Errors and mistakes", rather than the name of the tool.
IBM Checking Tool for Bugs Errors and mistakes (with its initials BEAM later in this article) is a static analysis tool developed by IBM that can
0x00 PrefaceThe static disassembly King, without a doubt, IDA Pro, greatly reduces the threshold for disassembly, especially the excellent "F5 plug-in" Hex-rays can restore the assembly code to a C-like pseudo code, greatly improving readability. But personally feel that "F5 plug-in" can only be used as an auxiliary means, after the combination of dynamic debuggi
Volley is simple to learn and use 5-source code analysis 3-volley source code analysis
I. Volley workflow:
Ii. NetworkNetwork requests to be processed in NetworkDispatcher are processed as follows:
NetworkResponse networkResponse = mNetwork.performRequest(request);Let's take a look at mNetwork definition: (define
5. program code area-stores the binary code of the function body.
Ii. Example Program
This is written by a senior. It is very detailed.
// Main. cpp
Int A = 0; global initialization Zone
Char * P1; uninitialized globally
Main ()
{
Int B; stack
Char s [] = "ABC"; stack
Char * P2; stack
Char * P3 = "123456"; 123456 is in the constant zone, and P3 is on the stack.
Static
= list of files that are not checked--disable= Close some kind of check-F Report type, such as HTMLCode Static Analysis Tool
Checkstyle: through code coding format, naming convention, Javadoc, class design and so on, the specification and style of inspection.
FindBugs: by examining a class file or jar file, the bytecode is compared to a set of
./callgrind.out.22737 --root=main | dot -Tsvg -o fib-callgrind-main.svg
It must be noted that, apart fromgprof2dot,kcachegrindIt can also be used to displayValgrind's callgrindData:
$ sudo apt-get install kcachegrind$ kcachegrind ./callgrind.out.22737
PassFile --> Export GraphYou can export call graphs. Only a graphical tool, a command line, andkcachegrindYou cannot display all branches at a time, but you can flexibly view them one by one.Summary
The above shows the actual execution path of th
red/black tree is better than that of the AVL Tree. Of course, the AVL tree may be more efficient in query, but it is actually not much higher.
The insert/delete operation of the red/black tree is simple, that is, the insert/delete operation of the binary sorting tree. The red and black trees are considered abnormal because they are inserted and deleted to adjust the red and black trees (rotation and coloring). There are many situations, due to the limited length and familiarity of bloggers, we
Static Code checking tool FindBugs
why and how to use FindBugsThe static analysis tool promises to find bugs that are already in the code without the hassle of a developer. Of course, if you have many years of experience in writing, you will know that these commitments are n
HMaster startup code analysis for source code analysis of HBase1.0.0 (2), hbase1.0.0hmaster
In the previous blog, my code analysis is the startup function of the startMaster core. This article mainly analyzes the corresponding com
disappear as the method disappears.Member variables are stored in objects in the heap and are collected by the garbage collector.such as the following code:Java codeClass BirthDate {private int day;private int month;private int year;Public BirthDate (int d, int m, int y) {Day = D;month = m;Year = y;}Omit the Get,set method ...}public class test{public static void Main (String args[]) {int date = 9;Test test = new test ();Test.change (date);BirthDate
HMaster startup code analysis for source code analysis of HBase1.0.0 (1), hbase1.0.0hmaster
This article is not really about startup code parsing. This article mainly analyzes the startHMaster part from the startup process. This article will introduce HBase's pseudo-distribu
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.