i7 performance comparison

Code:#import#importexternuint64_t Dispatch_benchmark (size_t count,void(^block) (void));//Pthread_mutex_lockvoidDispatch_once_pthread (dispatch_once_t *, dispatch_block_t);//spinlockvoidDispatch_once_spinlock (dispatch_once_t *, dispatch_block_t);intMainintargcConst Char*argv[]) {size_t count=1000000; //Pthread_mutex_lockuint64_t time1 = Dispatch_benchmark (count, ^{ Staticdispatch_once_t Oncetoken; Dispatch_once_pthread (oncetoken, ^{ }); }); NSLog (@"dispatch_once_pthread =%llu NS",

Comparison of Character Processing Performance between Node. js and PHP and Python, node. jspython Test Cases are divided into functions and classes for reading a large string of characters one by one. Test code Node. js Function var fs = require("fs");var content = fs.readFileSync("page.html", { encoding: "utf-8"});function chars(content){ var length = content.length; var pos = 0; while(pos ++ Class var f

Algorithm Ideas Sorting algorithms Complexity of Time Best case Worst case scenario Complexity of space Stability Insert Sort Insert directly O (N2) O (N) O (N2) O (1) Is Hill sort O (n (logn) 2) O (1) Whether Exchange sort Bubble sort O (N2) O (N) O (N2) O (1) Is Quick Sort O (NLOGN) O (NLOGN) O (N2) O (L

Using system;using system.collections.generic;using system.linq;using system.text;using System.Threading.Tasks; Using system.diagnostics;using autodesk.autocad.runtime;using autodesk.autocad.databaseservices;using Autodesk.autocad.applicationservices;using autodesk.autocad.editorinput;///} } }}At present, LINQ is very efficient, and later development can be assured with LINQ two times development.------------------------DWG drawing test results for 4m:Ed count:87796.0967LINQ count:8776

(listTester[] Testers={inserttester,iteratester,gettester,removetester};Test (testers,list);}private static void Test (tester[] testers, listfor (int i=0;iSystem.out.print (testers[i].getoperation () + "Operation:");Long T1=system.currenttimemillis ();Testers[i].test (list);Long T2=system.currenttimemillis ();System.out.print (t2-t1+ "MS");System.out.println ();}}public static void Main (string[] args) {ListTesting the Java arraySYSTEM.OUT.PRINTLN ("----Test Java array----");String[] Ss=new Str

all related functions and settings in iniThe magic_quotes_gpc, magic_quotes_runtime, and magic_quotes_sybase parameters are removed. While get_magic_quotes_gpc and get_magic_quotes_runtime are retained, but false is always returned. The set_magic_quotes_runtime will produce the E_CORE_ERROR error. ========================================================== ======================EXT/SQLITE extension removedDon't be surprised. The extension removed this time is only ext/sqlite, andExt/sqlite3And e

)) { Tools.makedata (table, count); //messagebox.show ("Data Init OK"); } return table; } public void Insert (Inserthandler handler, string msg) { DataTable table = initdatatable (); if (table = = null) { MessageBox.Show ("DataTable is null"); return; } int recordCount = table.Rows.Count; if (recordCount { MessageBox.Show ("No Data"); return; } int batchsize = 0; Int.TryParse (TxtBatchSize.Text.Trim (), out batchsize); if (bat

Comparison of performance tests on doitphp,thinkphp,yii,ci,doophp and other frameworks Test environment: ? Hardware environment: THINKPAD T61 Notebook Cpu:intel CORE (TM2) DUO T770 Memory: 2G HDD: 320G 7200 Graphics: Integrated Graphics ? Software Environment: Operating system: Win 2003 SP2 PHP Environment: apache/2.2.17 (WIN32) php/5.3.6 Database: MySQL 5.5.10 ? ? ? Test tool: Apache Bench (ie: AB) Test

Performance comparison of PHP three accelerators

[End of gossip] PHP For/foreach/while Performance Comparison

//Bubble SortfunctionBubble_sort ($arr){ $count=Count($arr); for($i= 0;$i$count;$i++){ for($j=$count-1;$j>$i;$j--){ if($arr[$j]$arr[$j-1]){ $tmp=$arr[$j]; $arr[$j] =$arr[$j-1]; $arr[$j-1] =$tmp; } } } return $arr;}//Quick SortfunctionQuick_sort ($arr){ $count=Count($arr); if($countreturn $arr; $key=$arr[0]; $l=Array(); $r=Array(); for($i= 1;$i$count;$i++){ if($arr[$i]$key){ $l[] =$arr[$i]; }Else{ $r[] =$arr[$i];

Java collections Performance Comparison Uncategorized,By Zen. Actually, this is the original post address. If you have time, simply translate it. List-thisIs an ordered list of objects, insertion order is maintained and retrieval order is in the list order but items can also be random accessed, duplicate items are allowed, generally allow storage of null values (the ones below do), generally fast to iterate

Sorting method Average Time Worst case scenario Degree of stability Extra Space Note Bubble O (N2) O (N2) Stability O (1) N Hours better Exchange O (N2) O (N2) Not stable O (1) N Hours better Choose O (N2) O (N2) Not stable O (1) N Hours better Insert O (N2) O (N2) Stability O (1) Most are sorted better

Pressure testModify the profile of the httpd stress test to add to http.confSetHandler Server-status#Order Deny,allow#Deny from all#Allow from 124.192.11.16Extendedstatus onSetHandler Server-info#Order Deny,allow#Deny from all#Allow from 124.192.11.16Restart ServiceServeice httpd RestartHttp://192.168.56.20:8080/server-status####################################################TestConvention: 1 user = 1 requestMultiple averages for testsLoaderrunler 总共请求多少 并发多少-rw-r--r--. 1 root root 156K Janua

A code structureTwo code explanation1. Test.cpp/************************************************************************* > File Name:test.cpp > Author:wan Gzhicheng > Mail: [emailprotected] > Created time:thu 09:35:49 PM WST ******************** /#include 2. Makfilecc=g++all:$ (CC)-std=c++0x-g-O test test.cpp-pthread-lpthreadC++11 multi-Threading and POSIX multithreading performance comparison

. Printf ("The by-the-%6.1f time is %d\n", I, float32 (D[i])/float32 (d[k-1]), K-1) }}When n=1000, the test results are as follows Time of the (0) =719386ms time of the (1) =. 428677ms Time of the (2) =930829ms 0is 2.2 21is 1.8 2When n=5000, the test result is as follows (because the error of mode 1, so its time is wrong)Time of the-0)= the. 003521ms1 1021Open file failed. Open BenchmarkFile.txt:too Many open files time of the-1)= +. 388994ms Time (2)= the. 777936ms0Cost time is

];//Current Item7obj[cur]=cur;8 }9 varlist=[];Ten for(Keyinchobj) { One List.push (Obj[key]) A } -Console.log (list);This method performs more efficiently, and many of the contents of the array do not crash in the browser, but the loop uses two timesTake another approach: Method threePrinciple: The loop array, which saves each item in the array as the property name and attribute value of the Obj object,But we found that if the property name already exists in the

of the network on the way to upload is roughly divided into two categories, such as the use of compiled components (DLL file) to upload, to use the Upload method must be installed on the server upload components or register components on the server to use; one is to upload using an precompiled code class, You do not need to register on the server to use it. These two types of components have more than 10 kinds, such as Aspsmartupload,aspupload,sa fileup,lyfupload, Transformation no component up

comparison | stored Procedure | performance | execution Recently wrote a program to import IP and the region of the list of a plain text file into the database, the first use is to execute the INSERT statement directly with SqlCommand, and then know that SQL Server can optimize the stored procedures, eliminating the time to parse the statement, Faster than using INSERT statements directly. I put the INSERT

Some time ago in a migration of data pump and exp, found that the difference in efficiency is quite large. Here is an example of a simple comparison. This article describes ways to improve the efficiency of IMPDP import. The test in the previous article found that IMPDP's import speed is comparable to IMP's import speed. When Oracle introduced the data pump, it was mentioned that IMPDP's import speed was 10 times times higher than that of IMP. But fo