# PHP_IloveU (2) php clothes and food parent: Java and PHP efficiency competition: Fibonacci series

Source: Internet
Author: User
PHP_IloveU (2) php food and clothing parents: Java and PHP efficiency competition: PHP_ I love U (1) php food and clothing parents: Java and PHP efficiency competition:

Fibonacci series

Fibonacci

See: http://zh.wikipedia.org/wiki/%E6%96%90%E6%B3%A2%E9%82%A3%E5%A5%91%E6%95%B0%E5%88%97

• (It should be 1. the Wikipedia formula is incorrect !?!)
• (N? 2)

• Write the Java code first this time:

Class fb {

Static int f1b (int x ){

If (0 = x) | (1 = x) {return 1 ;}
Int;
A = f1b (x-1) + x;
System. out. println ();
Return;
}
Public static void main (String [] args ){

Long startTime = System. nanoTime (); // star
Long startTimeMs = System. currentTimeMillis ();//
// DoSomeThing (); // Coding
F1b (999 );
Long endTime = System. nanoTime (); // end
System. out. println ("Run Timming:" + (endTime-startTime) + "ns ");
Long endTimeMs = System. currentTimeMillis (); // get the end time
System. out. println ("Runing Time:" + (endTimeMs-startTimeMs) + "ms ");

} // Main
} // Class fb

PHP code:

Function Fun1 (\$ x) // \$ x)
{
If (0 === x) {return 1; echo "\ r \ n ";}
If (1 === x) {return 1; echo "\ r \ n ";}

\$ B1 = \$ x + Fun1 (\$ X-1 );
Echo \$ b1;
Echo "\ r \ n ";
Return \$ b1;
}

\$ X0 = 999; // 100;
\$ T1 = microtime (true );

// Code for testing (time) efficiency;

Fun1 (\$ x0 );

\$ T2 = microtime (true );
Echo (\$ t2-\$ t1) * 1000). 'Ms ';

Result:

Java :......

499500

Time: 102.167238ns

Ms time: 104 ms

PHP :...

......

499500

Time (ms): 161.00978851318 ms

Result:

JAVA vs PHP

104 ms vs 161 ms

1574 ms vs 909 ms

Of course, Java won ......

But considering that java code should be compiled with Javac ......

PHP code runs directly with php.exe.

So after the calculation of the 999 (or 9999) Fibonacci series (both approximate) 1: 1.6 Efficiency ratio ...... PHP is acceptable.

In short: php I continues to love U (you )!

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