b.c

#include <stdio.h>
#include <sys/time.h>

#define BAILOUT 16
#define MAX_ITERATIONS 1000

int mandelbrot(double x, double y)
{
	double cr = y - 0.5;
	double ci = x;
	double zi = 0.0;
	double zr = 0.0;
	int i = 0;

	while(1) {
		i ++;
		double temp = zr * zi;
		double zr2 = zr * zr;
		double zi2 = zi * zi;
		zr = zr2 - zi2 + cr;
		zi = temp + temp + ci;
		if (zi2 + zr2 > BAILOUT)
			return i;
		if (i > MAX_ITERATIONS)
			return 0;
	}
	
}

int main (int argc, const char * argv[]) {
	struct timeval aTv;
	gettimeofday(&aTv, NULL);
	long init_time = aTv.tv_sec;
	long init_usec = aTv.tv_usec;

	int x,y;
	for (y = -39; y < 39; y++) {
		printf("\n");
		for (x = -39; x < 39; x++) {
			int i = mandelbrot(x/40.0, y/40.0);
			if (i==0)
				printf("*");
			else
				printf(" ");
		}	
	}
	printf ("\n");
	
	gettimeofday(&aTv,NULL);
	double query_time = (aTv.tv_sec - init_time) + (double)(aTv.tv_usec - init_usec)/1000000.0;	
	printf ("C Elapsed %0.3f\n", query_time);
    return 0;
}

b.lua

-- By Erik Wrenholt

local BAILOUT = 16
local MAX_ITERATIONS = 1000

function iterate(x,y)

	local cr = y-0.5
	local ci = x
	local zi = 0.0
	local zr = 0.0
	local i = 0
	
	while 1 do
		i = i+1
		local temp = zr * zi
		local zr2 = zr*zr
		local zi2 = zi*zi
		zr = zr2-zi2+cr
		zi = temp+temp+ci
		if (zi2+zr2 > BAILOUT) then
			return i
		end
		
		if (i > MAX_ITERATIONS) then
			return 0
		end
	end

end

function mandelbrot()
	local t = os.time()
	for y = -39, 38 do
		for x = -39, 38 do
			if (iterate(x/40.0, y/40) == 0) then
				io.write("*")
			else
				io.write(" ")
			end
		end
		io.write("\n")
	end
	io.write(string.format("Time Elapsed %d\n", os.time() - t))
end

mandelbrot()

b.php

<?php
define("BAILOUT",16);
define("MAX_ITERATIONS",1000);

class Mandelbrot
{
    function Mandelbrot()
    {
        $d1 = microtime(1);
        for ($y = -39; $y < 39; $y++) {
            for ($x = -39; $x < 39; $x++) {

                if ($this->iterate($x/40.0,$y/40.0) == 0) 
                    echo("*");
                else
                    echo(" ");

            }
            echo("\n");
        }
        $d2 = microtime(1);
        $diff = $d2 - $d1;
        printf("\nPHP Elapsed %0.3f\n", $diff);
    }

    function iterate($x,$y)
    {
        $cr = $y-0.5;
        $ci = $x;
        $zr = 0.0;
        $zi = 0.0;
        $i = 0;
        while (true) {
            $i++;
            $temp = $zr * $zi;
            $zr2 = $zr * $zr;
            $zi2 = $zi * $zi;
            $zr = $zr2 - $zi2 + $cr;
            $zi = $temp + $temp + $ci;
            if ($zi2 + $zr2 > BAILOUT)
                return $i;
            if ($i > MAX_ITERATIONS)
                return 0;
        }
    
    }


}

ob_start();
$m = new Mandelbrot();
ob_end_flush();
?>

b.pl

$BAILOUT=16;
$MAX_ITERATIONS=1000;

$begin = time();

sub mandelbrot {
       local $x = $_[0];
       local $y = $_[1];

       local $cr = $y - 0.5;
       local $ci = $x;
       local $zi = 0.0;
       local $zr = 0.0;
       local $i = 0;

       while (1)
       {
               $i = $i + 1;
               local $temp = $zr * $zi;
               local $zr2 = $zr * $zr;
               local $zi2 = $zi * $zi;
               $zr = $zr2 - $zi2 + $cr;
               $zi = $temp + $temp + $ci;
               if ($zi2 + $zr2 > $BAILOUT)
               {
                       return $i;
               }
               if ($i > $MAX_ITERATIONS)
               {
                       return 0;
               }
       }
}

for ($y = -39; $y < 39; $y++)
{
       print("\n");
       for ($x = -39; $x < 39; $x++)
       {
               $i = mandelbrot($x/40.0, $y/40.0);
               if ($i == 0)
               {
                       print("*");
               }
               else
               {
                       print(" ");
               }
       }
}
print("\n");

$end = time() - $begin;

print "Perl Elapsed $end\n";

b.py

import sys, time
stdout = sys.stdout

BAILOUT = 16
MAX_ITERATIONS = 1000

class Iterator:
  def __init__(self):
    print 'Rendering...'
    for y in range(-39, 39):
      stdout.write('\n')
      for x in range(-39, 39):
        i = self.mandelbrot(x/40.0, y/40.0)
        
        if i == 0:
          stdout.write('*')
        else:
          stdout.write(' ')
    
  def mandelbrot(self, x, y):
    cr = y - 0.5
    ci = x
    zi = 0.0
    zr = 0.0
    i = 0

    while True:
      i += 1
      temp = zr * zi
      zr2 = zr * zr
      zi2 = zi * zi
      zr = zr2 - zi2 + cr
      zi = temp + temp + ci
          
      if zi2 + zr2 > BAILOUT:
        return i
      if i > MAX_ITERATIONS:
        return 0

t = time.time()
Iterator()
print '\nPython Elapsed %.02f' % (time.time() - t)

b.ru

BAILOUT = 16
MAX_ITERATIONS = 1000

class Mandelbrot
	
	def initialize
		puts "Rendering"
		for y in -39...39 do
			puts
			for x in -39...39 do
				i = iterate(x/40.0,y/40.0)
				if (i == 0)
					print "*"
				else
					print " "
				end
			end
		end
	end

	def iterate(x,y)
		cr = y-0.5
		ci = x
		zi = 0.0
		zr = 0.0
		i = 0
		
		while(1)
			i += 1
			temp = zr * zi
			zr2 = zr * zr
			zi2 = zi * zi
			zr = zr2 - zi2 + cr
			zi = temp + temp + ci
			return i if (zi2 + zr2 > BAILOUT)
			return 0 if (i > MAX_ITERATIONS)
		end
	
	end

end

time = Time.now
Mandelbrot.new
puts
puts "Ruby Elapsed %f" % (Time.now - time)

b.sq

function mandelbrot(x, y) {
    local cr = y - 0.5;
    local ci = x;
    local zi = 0.0;
    local zr = 0.0;
    local i = 0;
    local BAILOUT = 16;
    local MAX_ITERATIONS = 1000;

    while(1) {
        i++;
        local temp = zr * zi;
        local zr2 = zr * zr;
        local zi2 = zi * zi;
        zr = zr2 - zi2 + cr;
        zi = temp + temp + ci;
        if (zi2 + zr2 > BAILOUT) {
            return i;
        }
        if (i > MAX_ITERATIONS) {
            return 0;
        }
    }
}

function mandelbrot_run() {
    local x;
    local y;
    
//    local date = Date();
    for (y = -39; y < 39; y++) {
        for (x = -39; x < 39; x++) {
            if (mandelbrot(x/40.0, y/40.0) == 0) {
				print("*");
            } else {
				print(" ");
            }
        }   
		print("\n");
    }
//    local date2 = Date();
//    output += "\nJavaScript Elapsed " + (date2.getTime() - date.getTime()) / 1000;
}

mandelbrot_run();

b.txt

LapTop (12 Feb 2015)
====================
PHP7-JIT (JIT=on)			0.011
gcc -O2 (4.9.2)				0.013
LuaJIT-2.0.3 (JIT=on) 			0.014
gcc -O0 (4.9.2)				0.022
HHVM-3.5.0 (JIT=on) 			0.030
Java-1.8.0 (JIT=on)			0.059
LuaJIT-2.0.3 (JIT=off)			0.073
Java-1.8.0 (JIT=off)			0.251
PHP-7					0.281
squirrel-3.0.4				0.335
Lua-5.2.2				0.339
PHP-5.6					0.379
PHP-5.5					0.383
PHP-5.4					0.406
ruby-2.1.5				0.684
PHP-5.3					0.855
HHVM-3.5.0 (JIT=off)			0.978
PHP-5.2					1.096
python-2.7.8				1.128
PHP-5.1					1.217
perl-5.18.4				2.083
PHP-4.4					4.209
PHP-5.0					4.434

Mabdelbrot.java

// by Erik Wrenholt
import java.util.*;

class Mandelbrot
{  
    static int BAILOUT = 16;
    static int MAX_ITERATIONS = 1000;
    
    private static int iterate(float x, float y)
    {
        float cr = y-0.5f;
        float ci = x;
        float zi = 0.0f;
        float zr = 0.0f;
        int i = 0;
        while (true) {
            i++;
            float temp = zr * zi;
            float zr2 = zr * zr;
            float zi2 = zi * zi;
            zr = zr2 - zi2 + cr;
            zi = temp + temp + ci;
            if (zi2 + zr2 > BAILOUT)
                return i;
            if (i > MAX_ITERATIONS)
                return 0;
        }
    }

    public static void main(String args[])
    {
        Date d1 = new Date();
        int x,y;
        for (y = -39; y < 39; y++) {
            System.out.print("\n");
            for (x = -39; x < 39; x++) {
                if (iterate(x/40.0f,y/40.0f) == 0) 
                    System.out.print("*");
                else
                    System.out.print(" ");

            }
        }
        Date d2 = new Date();
        long diff = d2.getTime() - d1.getTime();
        System.out.println("\nJava Elapsed " + diff/1000.0f);
        
    }
}

Hi, for Java you should use the "final" keyword for BAILOUT and MAX_ITERATIONS.
Also its useless to instanciate new Date() for what you are doing, use System.currentTimeMillis() instead.

I haven't noticed you had "echo" / "println" in your code, put only 1 of those functions at the end for showing the duration and the result, otherwise you're benchmark is not reliable. Also, is it an average ? How many time have you launched those codes ?

Improved Perl code, local here is not appropriate.

Also using Time::HiRes for accurate measurements. But that's optional.

$BAILOUT=16;
$MAX_ITERATIONS=1000;

use Time::HiRes qw(gettimeofday tv_interval);
$begin = [gettimeofday];

sub mandelbrot {
       my $x = $_[0];
       my $y = $_[1];

       my $cr = $y - 0.5;
       my $ci = $x;
       my $zi = 0.0;
       my $zr = 0.0;
       my $i = 0;

       while (1)
       {
               $i = $i + 1;
               my $temp = $zr * $zi;
               my $zr2 = $zr * $zr;
               my $zi2 = $zi * $zi;
               $zr = $zr2 - $zi2 + $cr;
               $zi = $temp + $temp + $ci;
               if ($zi2 + $zr2 > $BAILOUT)
               {
                       return $i;
               }
               if ($i > $MAX_ITERATIONS)
               {
                       return 0;
               }
       }
}

for ($y = -39; $y < 39; $y++)
{
       print("\n");
       for ($x = -39; $x < 39; $x++)
       {
               $i = mandelbrot($x/40.0, $y/40.0);
               if ($i == 0)
               {
                       print("*");
               }
               else
               {
                       print(" ");
               }
       }
}
print("\n");

$end = tv_interval ( $begin );

print "Perl Elapsed $end\n";

Go 1.5 on a MacBook Pro; time: 0.010

package main

import (
    "bytes"
    "fmt"
    "time"
)

const (
    BAILOUT        = 16
    MAX_ITERATIONS = 1000
)

func main() {
    var buf bytes.Buffer
    startTime := time.Now()
    for y := -39.0; y < 39.0; y++ {
        for x := -39.0; x < 39.0; x++ {
            if iterate(x/40.0, y/40.0) == 0.0 {
                buf.WriteRune('*')
            } else {
                buf.WriteRune(' ')
            }
        }
        buf.WriteRune('\n')
    }
    fmt.Print(buf.String())
    fmt.Printf("\nGo Elapsed %.3f\n", time.Now().Sub(startTime).Seconds())
}

func iterate(x, y float64) float64 {
    cr := y - 0.5
    ci := x
    zr := 0.0
    zi := 0.0
    i := 0.0
    for {
        i++
        temp := zr * zi
        zr2 := zr * zr
        zi2 := zi * zi
        zr = zr2 - zi2 + cr
        zi = temp + temp + ci
        if zi2+zr2 > BAILOUT {
            return i
        }
        if i > MAX_ITERATIONS {
            return 0.0
        }
    }
}

Go 1.5 using concurrency / parallelism. Time: 0.002 !!

package main

import (
    "bytes"
    "fmt"
    "strings"
    "time"
)

const (
    BAILOUT        = 16
    MAX_ITERATIONS = 1000
)

type line struct {
    number int
    text   string
}

func main() {
    out := make(chan *line, 80)
    startTime := time.Now()
    for y := -39.0; y < 39.0; y++ {
        // Fan out
        go lines(y, out)
    }
    // Fan in
    ls := make([]string, 80)
    for y := -39.0; y < 39.0; y++ {
        l := <-out
        ls[l.number+39] = l.text
    }
    fmt.Print(strings.Join(ls, ""))
    fmt.Printf("\nGo Elapsed %.3f\n", time.Now().Sub(startTime).Seconds())
}

func lines(y float64, out chan<- *line) {
    var buf bytes.Buffer
    for x := -39.0; x < 39.0; x++ {
        if iterate(x/40.0, y/40.0) == 0.0 {
            buf.WriteRune('*')
        } else {
            buf.WriteRune(' ')
        }
    }
    buf.WriteRune('\n')
    out <- &line{
        number: int(y),
        text:   buf.String(),
    }
}

func iterate(x, y float64) float64 {
    cr := y - 0.5
    ci := x
    zr := 0.0
    zi := 0.0
    i := 0.0
    for {
        i++
        temp := zr * zi
        zr2 := zr * zr
        zi2 := zi * zi
        zr = zr2 - zi2 + cr
        zi = temp + temp + ci
        if zi2+zr2 > BAILOUT {
            return i
        }
        if i > MAX_ITERATIONS {
            return 0.0
        }
    }
}

Java benchmark is wrong. Where is warmup?
I will try rewrite your benchmark for c too.

@dstogov

I fixed java benchmark, please run on your test machine and update results
https://github.com/gurinderu/benchmarks

Hey, is this a purpose or a mistake that the file is called Mabdelbrot.java and not Mandelbrot.java?

Where did you get PHP7-JIT? There is no code for JIT in PHP7 at all !!!

@nimdam https://github.com/zendtech/php-src/tree/zend-jit/ext/opcache/jit rly?

ob_start();
$m = new Mandelbrot();
ob_end_flush();

It's not fair test when PHP uses buffer and others not.

The PHP code uses the old PHP 4 style constructor, which is removed in 8.0 onward.
You will want to change Mandlebrot() to __construct() for PHP 8.0+

https://www.php.net/manual/en/language.oop5.decon.php