# Php_i love u (2) php food and clothing parents: Java and PHP efficiency battle one: Fibonacci sequence

Source: Internet
Author: User
Php_i love u (1) php Food and clothing parents: Java and PHP efficiency battle one:

Fibonacci sequence

Fibonacci

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

• (should be 1, Wiki's formula is wrong!?! ）
• (n?2)

• This time write the Java code First:

Class FB {

static int f1b (int x) {

if ((0==x) | | | (1==x)) {return 1;}
int A;
A=F1B (x-1) +x;
System.out.println (a);
return A;
}
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 End time
System.out.println ("runing Time:" + (Endtimems-starttimems) + "MS");

}//main
}//class FB

Code for PHP:

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

\$b 1= \$x + Fun1 (\$x-1);
echo \$b 1;
echo "\ r \ n";
return \$b 1;
}

\$x 0=999;//100;
\$t 1 = microtime (true);

The code to test (time) efficiency;

Fun1 (\$x 0);

\$t 2 = Microtime (true);
Echo ((\$t 2-\$t 1) *1000). ' Ms ';

Results:

Java:......

499500

Time:104177238ns

MS time:104ms

Php:...

......

499500

Time (MS): 161.00978851318ms

Results:

JAVA vs PHP

104ms vs 161ms

1574ms vs 909ms

Java wins, of course ...

But consider the Java code to be compiled with Javac again ...

The PHP code runs directly with Php.exe.

So 999 times (or 9,999 times) The Fibonacci sequence is calculated (both approximate) 1:1.6 efficiency ratio ... PHP is still acceptable.

Anyway: PHP I continue love U!

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