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PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorial
PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorial
PHP7 RC7 Release compared to PHP5.6 quick sort 20000 data performance experience and new syntax tryout
Recently, Zend’s PHP7 has been in the final bug fixing stage, and RC7 has been updated. According to Zend’s official statement, the performance of PHP7 is about 2 times higher than that of the PHP5 series version, and some new syntax has been added. Some factors affecting performance of PHP5 have been removed, and the following Features have been mainly added.
- Improved performance: PHP 7 is up to twice as fast as PHP 5.6 Consistent 64-bit support 64-bit consistency support Many fatal errors are now Exceptions Remove of old and unsupported SAPIs and extensions Removed old unsupported SAPIS and some extensions The null coalescing operator (??) Combined comparison operator () Return Type Declarations are displayed the same as C language, etc. Return value type Scalar Type Declarations Scalar type definition Anonymous Classes Anonymous classes! Out of curiosity, I installed PHP5.5 and PHP7 RC7 Release at the same time to experience it, so I experienced the performance improvement and new syntax of PHP7 respectively. As for how to install and configure PHP7 I believe I don’t need to say anything else, no more nonsense.
http:PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorialphp.netPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorial php7 RC7 Release official address
https:PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorialwiki.php.netPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialrfcPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorialscalar_type_hints_v5 PHP7 wiki
1. Performance comparison between PHP7 and PHP5.5
How much has the performance of PHP7 improved compared to PHP5.6? You will know by testing it with a simple and silly code. Here I will use the 5.5 version of PHP to compare. There is only 5.5 on the computer and I am too lazy to install PHP5.6.
As shown below php7 and php5.5:
1.1 Here I use a small piece of silly code to test PHP:
<!--?php
function microtime_float()
{
list($usec, $sec) = explode( , microtime());
return ((float)$usec + (float)$sec);
}
define('ARRAY_SIZE',20000);
function QuickSort($arr,$low,$high)
{
if($low-->$high)
return ;
$begin=$low;
$end=$high ;
$key=$arr[$begin];
while($begin=$key)
--$end ;
$arr[$begin]=$arr[$end];
while($begin<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
<h2><strong>1.2 Test results<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialstrong><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialh2>
After running 20,000 random data under PHP7 and PHP5.5 respectively, the result after the quick sort algorithm is that PHP7 is 12 times that of PHP5.5!!!! It seems that PHP7 is starting to take off! <br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
The following are the speeds of PHP7 RC7 and PHP5 running the above quick sort 20000 data algorithm. <br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<img alt="PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorial" src="http:PHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20TutorialPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20Tutorialwww.bkjia.comPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20TutorialuploadsPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20TutorialallimgPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20Tutorial151129PHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20Tutorial041F35C7-2.jpg" php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial><img alt="PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorial" src="http:PHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20TutorialPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20Tutorialwww.bkjia.comPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20TutorialuploadsPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20TutorialallimgPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20Tutorial151129PHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20Tutorial041F3KM-3.jpg" php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial><br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<h1>2. PHP7 new syntax experience<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialh1>
<h2>2.1, Scalar type and strong type<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialh2>
<code>PHP7新增四个标量类型 int<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialcode>, <code>float<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialcode>, <code>string<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialcode> <code>bool, 首先要使用强类型 必须在文件中加入指令<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialcode><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialli>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<li class="level1"><code>declare(strict_types=1)该指令必须是第一个指令而且只有一种用法 <php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialcode>The so-called concept of strict typing and strong typing is that we have to abandon the concept of type before PHP5.6, because we know that PHP itself is a typed language. Because of this, type conversion and type checking lead to the PHP language The extremely low performance of php7 also proves this point, for example, the following code
<pre class="code">
<!--?php
declare(strict_types=1);
function GetInt():int{
return 1.0;
}
echo GetInt();
?--><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
If you change the above code to return 1;, it can run normally, otherwise an error will be reported. This is the strong type constraint of PHP7. In this mode, the if type is completely abandoned.
<pre class="code">
<!--?php
declare(strict_types=1);
function GetInt():int{
return 1;
}
echo GetInt();
?--><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<h2>2.2 Strong type parameters<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialh2>
<pre class="code">
<!--?php
declare(strict_types=1);
function add(int $a,int $b):int{
return $a+$b;
}
echo add(1,2);
?--><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
<pre class="code">
<!--?php
declare(strict_types=1);
function add(int $a,int $b):int{
return $a+$b;
}
var_dump(add(1,2));
?--><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
The result of var_dump is int(3)<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<h2>2.3 Return type conflict<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialh2>
If the return value type is different from the strong type constraint, an exception will be thrown.
<pre class="code">
<!--?php
declare(strict_types=1);
function foobar(float $abc): int {
return ceil($abc + 1);
}
try{
foobar(1.22);
}catch(Exception $ex){
echo $ex--->getMessage();
}
?><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
OK, I won’t write about Scalar Type one by one <br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
For more introduction, please refer to: https:PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorialwiki.php.netPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialrfcPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorialscalar_type_hints_v5#php_rfcscalar_type_declarations<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<h2><strong>2.4, About PHP’s Anonymous Class<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialstrong><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialh2>
<strong>Simple anonymous class inheritance<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialstrong>
<pre class="code">
<!--?php
declare(strict_types=1);
class Foo {public function M1(){echo 'hello,world!';}}
$child = new class extends Foo { public function M2(){echo 'hello,world!';return $this;}};
$child--->M2()->M1();
?><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<strong>Simple anonymous class instantiation<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialstrong>
<pre class="code">
<!--?php
declare(strict_types=1);
var_dump(new class(5) {
public function __construct($i) {
$this--->i = $i;
}
});
?><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<p> <php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialp>
<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialli>
<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialul> <php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialp>
<p align="left"></p><div style="display:none;"><span id="url" itemprop="url">http:PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorialwww.bkjia.comPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialPHPjcPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorial1075799.html<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialspan><span id="indexUrl" itemprop="indexUrl">www.bkjia.com<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialspan><span id="isOriginal" itemprop="isOriginal">true<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialspan><span id="isBasedOnUrl" itemprop="isBasedOnUrl">http: PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorialwww.bkjia.comPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialPHPjcPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorial1075799.html<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialspan><span id="genre" itemprop="genre">TechArticle<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialspan><span id="description" itemprop="description">PHP7 RC7 Release compared to PHP5.6 quick sort 20000 data performance experience and new syntax early adopters Recently Zend’s PHP7 has been at the bottom In the BUG repair stage, RC7 has been updated. For Zend official...<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialspan><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialdiv><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialp><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialdiv>
<div class="art_confoot"><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialdiv></php7></div></php7></php7></php7></php7></span></php7></span></php7></span></php7></span></php7></span></php7></span></div></php7></php7></php7></php7></p></php7>Copy after login
Recently, Zend’s PHP7 has been in the final bug fixing stage, and RC7 has been updated. According to Zend’s official statement, the performance of PHP7 is about 2 times higher than that of the PHP5 series version, and some new syntax has been added. Some factors affecting performance of PHP5 have been removed, and the following Features have been mainly added.
http:PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorialphp.netPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorial php7 RC7 Release official address
https:PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorialwiki.php.netPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialrfcPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorialscalar_type_hints_v5 PHP7 wiki
1. Performance comparison between PHP7 and PHP5.5
As shown below php7 and php5.5:
1.1 Here I use a small piece of silly code to test PHP:
<!--?php
function microtime_float()
{
list($usec, $sec) = explode( , microtime());
return ((float)$usec + (float)$sec);
}
define('ARRAY_SIZE',20000);
function QuickSort($arr,$low,$high)
{
if($low-->$high)
return ;
$begin=$low;
$end=$high ;
$key=$arr[$begin];
while($begin=$key)
--$end ;
$arr[$begin]=$arr[$end];
while($begin<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
<h2><strong>1.2 Test results<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialstrong><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialh2>
After running 20,000 random data under PHP7 and PHP5.5 respectively, the result after the quick sort algorithm is that PHP7 is 12 times that of PHP5.5!!!! It seems that PHP7 is starting to take off! <br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
The following are the speeds of PHP7 RC7 and PHP5 running the above quick sort 20000 data algorithm. <br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<img alt="PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorial" src="http:PHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20TutorialPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20Tutorialwww.bkjia.comPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20TutorialuploadsPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20TutorialallimgPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20Tutorial151129PHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20Tutorial041F35C7-2.jpg" php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial><img alt="PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorial" src="http:PHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20TutorialPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20Tutorialwww.bkjia.comPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20TutorialuploadsPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20TutorialallimgPHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20Tutorial151129PHP7%20RC7%20Release%20Comparison%20of%20PHP5.6%20Quick%20Sort%2020000%20Data%20Performance%20Experience%20and%20New%20Syntax%20Tryout_PHP%20Tutorial041F3KM-3.jpg" php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial><br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<h1>2. PHP7 new syntax experience<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialh1>
<h2>2.1, Scalar type and strong type<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialh2>
<code>PHP7新增四个标量类型 int<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialcode>, <code>float<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialcode>, <code>string<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialcode> <code>bool, 首先要使用强类型 必须在文件中加入指令<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialcode><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialli>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<li class="level1"><code>declare(strict_types=1)该指令必须是第一个指令而且只有一种用法 <php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialcode>The so-called concept of strict typing and strong typing is that we have to abandon the concept of type before PHP5.6, because we know that PHP itself is a typed language. Because of this, type conversion and type checking lead to the PHP language The extremely low performance of php7 also proves this point, for example, the following code
<pre class="code">
<!--?php
declare(strict_types=1);
function GetInt():int{
return 1.0;
}
echo GetInt();
?--><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
If you change the above code to return 1;, it can run normally, otherwise an error will be reported. This is the strong type constraint of PHP7. In this mode, the if type is completely abandoned.
<pre class="code">
<!--?php
declare(strict_types=1);
function GetInt():int{
return 1;
}
echo GetInt();
?--><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<h2>2.2 Strong type parameters<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialh2>
<pre class="code">
<!--?php
declare(strict_types=1);
function add(int $a,int $b):int{
return $a+$b;
}
echo add(1,2);
?--><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
<pre class="code">
<!--?php
declare(strict_types=1);
function add(int $a,int $b):int{
return $a+$b;
}
var_dump(add(1,2));
?--><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
The result of var_dump is int(3)<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<h2>2.3 Return type conflict<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialh2>
If the return value type is different from the strong type constraint, an exception will be thrown.
<pre class="code">
<!--?php
declare(strict_types=1);
function foobar(float $abc): int {
return ceil($abc + 1);
}
try{
foobar(1.22);
}catch(Exception $ex){
echo $ex--->getMessage();
}
?><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
OK, I won’t write about Scalar Type one by one <br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
For more introduction, please refer to: https:PHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorialwiki.php.netPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP TutorialrfcPHP7 RC7 Release Comparison of PHP5.6 Quick Sort 20000 Data Performance Experience and New Syntax Tryout_PHP Tutorialscalar_type_hints_v5#php_rfcscalar_type_declarations<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<h2><strong>2.4, About PHP’s Anonymous Class<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialstrong><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialh2>
<strong>Simple anonymous class inheritance<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialstrong>
<pre class="code">
<!--?php
declare(strict_types=1);
class Foo {public function M1(){echo 'hello,world!';}}
$child = new class extends Foo { public function M2(){echo 'hello,world!';return $this;}};
$child--->M2()->M1();
?><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<strong>Simple anonymous class instantiation<php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialstrong>
<pre class="code">
<!--?php
declare(strict_types=1);
var_dump(new class(5) {
public function __construct($i) {
$this--->i = $i;
}
});
?><php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialpre>
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<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<br php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorial>
<p> <php7 rc7 release comparison of php5.6 quick sort data performance experience and new syntax tryout_php tutorialp>
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Slow Cellular Data Internet Speeds on iPhone: Fixes
May 03, 2024 pm 09:01 PM
Facing lag, slow mobile data connection on iPhone? Typically, the strength of cellular internet on your phone depends on several factors such as region, cellular network type, roaming type, etc. There are some things you can do to get a faster, more reliable cellular Internet connection. Fix 1 – Force Restart iPhone Sometimes, force restarting your device just resets a lot of things, including the cellular connection. Step 1 – Just press the volume up key once and release. Next, press the Volume Down key and release it again. Step 2 – The next part of the process is to hold the button on the right side. Let the iPhone finish restarting. Enable cellular data and check network speed. Check again Fix 2 – Change data mode While 5G offers better network speeds, it works better when the signal is weaker
The vitality of super intelligence awakens! But with the arrival of self-updating AI, mothers no longer have to worry about data bottlenecks
Apr 29, 2024 pm 06:55 PM
I cry to death. The world is madly building big models. The data on the Internet is not enough. It is not enough at all. The training model looks like "The Hunger Games", and AI researchers around the world are worrying about how to feed these data voracious eaters. This problem is particularly prominent in multi-modal tasks. At a time when nothing could be done, a start-up team from the Department of Renmin University of China used its own new model to become the first in China to make "model-generated data feed itself" a reality. Moreover, it is a two-pronged approach on the understanding side and the generation side. Both sides can generate high-quality, multi-modal new data and provide data feedback to the model itself. What is a model? Awaker 1.0, a large multi-modal model that just appeared on the Zhongguancun Forum. Who is the team? Sophon engine. Founded by Gao Yizhao, a doctoral student at Renmin University’s Hillhouse School of Artificial Intelligence.
The U.S. Air Force showcases its first AI fighter jet with high profile! The minister personally conducted the test drive without interfering during the whole process, and 100,000 lines of code were tested for 21 times.
May 07, 2024 pm 05:00 PM
Recently, the military circle has been overwhelmed by the news: US military fighter jets can now complete fully automatic air combat using AI. Yes, just recently, the US military’s AI fighter jet was made public for the first time and the mystery was unveiled. The full name of this fighter is the Variable Stability Simulator Test Aircraft (VISTA). It was personally flown by the Secretary of the US Air Force to simulate a one-on-one air battle. On May 2, U.S. Air Force Secretary Frank Kendall took off in an X-62AVISTA at Edwards Air Force Base. Note that during the one-hour flight, all flight actions were completed autonomously by AI! Kendall said - "For the past few decades, we have been thinking about the unlimited potential of autonomous air-to-air combat, but it has always seemed out of reach." However now,
Tesla robots work in factories, Musk: The degree of freedom of hands will reach 22 this year!
May 06, 2024 pm 04:13 PM
The latest video of Tesla's robot Optimus is released, and it can already work in the factory. At normal speed, it sorts batteries (Tesla's 4680 batteries) like this: The official also released what it looks like at 20x speed - on a small "workstation", picking and picking and picking: This time it is released One of the highlights of the video is that Optimus completes this work in the factory, completely autonomously, without human intervention throughout the process. And from the perspective of Optimus, it can also pick up and place the crooked battery, focusing on automatic error correction: Regarding Optimus's hand, NVIDIA scientist Jim Fan gave a high evaluation: Optimus's hand is the world's five-fingered robot. One of the most dexterous. Its hands are not only tactile
Single card running Llama 70B is faster than dual card, Microsoft forced FP6 into A100 | Open source
Apr 29, 2024 pm 04:55 PM
FP8 and lower floating point quantification precision are no longer the "patent" of H100! Lao Huang wanted everyone to use INT8/INT4, and the Microsoft DeepSpeed team started running FP6 on A100 without official support from NVIDIA. Test results show that the new method TC-FPx's FP6 quantization on A100 is close to or occasionally faster than INT4, and has higher accuracy than the latter. On top of this, there is also end-to-end large model support, which has been open sourced and integrated into deep learning inference frameworks such as DeepSpeed. This result also has an immediate effect on accelerating large models - under this framework, using a single card to run Llama, the throughput is 2.65 times higher than that of dual cards. one
Open-Sora comprehensive open source upgrade: supports 16s video generation and 720p resolution
Apr 25, 2024 pm 02:55 PM
Open-Sora has been quietly updated in the open source community. It now supports video generation up to 16 seconds, with resolutions up to 720p, and can handle text-to-image, text-to-video, image-to-video, and video-to-video of any aspect ratio. and the generation needs of infinitely long videos. Let's try it out. Generate a horizontal screen Christmas snow scene, post to B site and then generate a vertical screen, and use Douyin to generate a 16-second long video. Now everyone can have a screenwriting addiction. How to play? Guidance GitHub: https://github.com/hpcaitech/Open-Sora What’s even cooler is that Open-Sora is still all open source, including the latest model architecture, the latest model weights, multi-time/resolution/long-term
Within hours of release, Microsoft deleted a large open source model comparable to GPT-4 in seconds! Forgot to take the poison test
Apr 23, 2024 pm 05:22 PM
Last week, Microsoft airdropped WizardLM-2, an open source model called GPT-4 level. But I didn’t expect that it would be deleted immediately a few hours after it was posted. Some netizens suddenly discovered that WizardLM’s model weights and announcement posts had all been deleted and were no longer in the Microsoft collection. Apart from the mention of the site, no evidence could be found to prove that this was an official Microsoft project. The GitHub project homepage has become a 404. Project address: https://wizardlm.github.io/ Including the weight of the model on HF, all have disappeared... The whole network is full of confusion, why is WizardLM gone? However, the reason Microsoft did this was because the team forgot to "test" the model. Later, micro
Performance comparison of different Java frameworks
Jun 05, 2024 pm 07:14 PM
Performance comparison of different Java frameworks: REST API request processing: Vert.x is the best, with a request rate of 2 times SpringBoot and 3 times Dropwizard. Database query: SpringBoot's HibernateORM is better than Vert.x and Dropwizard's ORM. Caching operations: Vert.x's Hazelcast client is superior to SpringBoot and Dropwizard's caching mechanisms. Suitable framework: Choose according to application requirements. Vert.x is suitable for high-performance web services, SpringBoot is suitable for data-intensive applications, and Dropwizard is suitable for microservice architecture.
