-
-
Save timo/b52c874c07d27d631bb3 to your computer and use it in GitHub Desktop.
nbody benchmark
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
just run this with a parameter like 30000 to get a good few runs in. | |
the native version of this will take longer - on my machine they run in: | |
objects: 9573.21ms - 99.83% jitted frame entries - 110 GC runs | |
native : 11998.7ms - 77.3% jitted frame entries - 340 GC runs | |
without the .Int after $*ARGS[0], we get these numbers: | |
objects: 11996.5ms - 96.43 jitted frame entries - 147 GC runs | |
native : 14573.28ms - 75.57 jitted frame entries - 379 GC runs |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# | |
# The Great Computer Language Shootout | |
# http://shootout.alioth.debian.org/ | |
# | |
# contributed by Christoph Bauer | |
# converted into Perl by Márton Papp | |
# | |
my num $pi = 3.141592653589793e0; | |
my num $solar_mass = (4e0 * $pi * $pi).Num; | |
my num $days_per_year = 365.24e0; | |
class Body is rw { | |
has num ($.x, $.y, $.z); | |
has num ($.vx, $.vy, $.vz); | |
has num $.mass; | |
} | |
sub advance (@bodies is rw, num $dt) | |
{ | |
my int ($i, $j); | |
my $nbodies = @bodies.elems; | |
loop ($i = 0; $i < $nbodies; $i++) { | |
my Body $b = @bodies[$i]; | |
my Body $b2; | |
my num ($dx, $dy,$dz,$distance,$mag); | |
my num ($bmass, $b2massmag); | |
$bmass = $b.mass; | |
loop ($j = $i + 1; $j < $nbodies; $j++) { | |
$b2 = @bodies[$j]; | |
$dx = $b.x - $b2.x; | |
$dy = $b.y - $b2.y; | |
$dz = $b.z - $b2.z; | |
$distance = sqrt($dx * $dx + $dy * $dy + $dz * $dz); | |
$mag = $dt / ($distance * $distance * $distance); | |
$b2massmag = $b2.mass * $mag; | |
$b.vx -= $dx * $b2massmag; | |
$b.vy -= $dy * $b2massmag; | |
$b.vz -= $dz * $b2massmag; | |
$b2.vx += $dx * $bmass * $mag; | |
$b2.vy += $dy * $bmass * $mag; | |
$b2.vz += $dz * $bmass * $mag; | |
} | |
} | |
loop ($i = 0; $i < $nbodies; $i++) { | |
my $b = @bodies[$i]; | |
$b.x += $dt * $b.vx; | |
$b.y += $dt * $b.vy; | |
$b.z += $dt * $b.vz; | |
} | |
} | |
sub energy(@bodies is readonly) | |
{ | |
my num $e; | |
my int ($i, $j); | |
my int $nbodies = @bodies.elems; | |
$e = 0.0e0; | |
loop ($i = 0; $i < $nbodies; $i++) { | |
my $b = @bodies[$i]; | |
$e += 0.5 * $b.mass * ($b.vx * $b.vx + $b.vy * $b.vy + $b.vz * $b.vz); | |
my num ($dx,$dy,$dz,$distance); | |
loop ($j = $i + 1; $j < $nbodies; $j++) { | |
my $b2 = @bodies[$j]; | |
$dx = $b.x - $b2.x; | |
$dy = $b.y - $b2.y; | |
$dz = $b.z - $b2.z; | |
$distance = sqrt($dx * $dx + $dy * $dy + $dz * $dz); | |
$e -= ($b.mass * $b2.mass) / $distance; | |
} | |
} | |
return $e; | |
} | |
sub offset_momentum(@bodies is rw) | |
{ | |
my num $px = 0.0e0; | |
my num $py = 0.0e0; | |
my num $pz = 0.0e0; | |
my int $i; | |
my int $nbodies = @bodies.elems; | |
my num $bmass; | |
loop ($i = 0; $i < $nbodies; $i++) { | |
my $body = @bodies[$i]; | |
$bmass = $body.mass; | |
$px += $body.vx * $bmass; | |
$py += $body.vy * $bmass; | |
$pz += $body.vz * $bmass; | |
} | |
@bodies[0].vx = - $px / $solar_mass; | |
@bodies[0].vy = - $py / $solar_mass; | |
@bodies[0].vz = - $pz / $solar_mass; | |
} | |
my @bodies = | |
Body.new( # sun | |
x => 0e0, y => 0e0,z => 0e0,vx => 0e0, vy => 0e0,vz => 0e0, mass=> $solar_mass | |
), | |
Body.new( # jupiter | |
x => 4.84143144246472090e+00, | |
y => -1.16032004402742839e+00, | |
z => -1.03622044471123109e-01, | |
vx => 1.66007664274403694e-03 * $days_per_year, | |
vy => 7.69901118419740425e-03 * $days_per_year, | |
vz => -6.90460016972063023e-05 * $days_per_year, | |
mass=> 9.54791938424326609e-04 * $solar_mass | |
), | |
Body.new( #saturn | |
x => 8.34336671824457987e+00, | |
y => 4.12479856412430479e+00, | |
z => -4.03523417114321381e-01, | |
vx => -2.76742510726862411e-03 * $days_per_year, | |
vy => 4.99852801234917238e-03 * $days_per_year, | |
vz => 2.30417297573763929e-05 * $days_per_year, | |
mass=> 2.85885980666130812e-04 * $solar_mass | |
), | |
Body.new( #uranus | |
x => 1.28943695621391310e+01, | |
y => -1.51111514016986312e+01, | |
z => -2.23307578892655734e-01, | |
vx => 2.96460137564761618e-03 * $days_per_year, | |
vy => 2.37847173959480950e-03 * $days_per_year, | |
vz => -2.96589568540237556e-05 * $days_per_year, | |
mass=> 4.36624404335156298e-05 * $solar_mass | |
), | |
Body.new( #neptune | |
x => 1.53796971148509165e+01, | |
y => -2.59193146099879641e+01, | |
z => 1.79258772950371181e-01, | |
vx => 2.68067772490389322e-03 * $days_per_year, | |
vy => 1.62824170038242295e-03 * $days_per_year, | |
vz => -9.51592254519715870e-05 * $days_per_year, | |
mass=> 5.15138902046611451e-05 * $solar_mass | |
) | |
; | |
my int $n = @*ARGS[0].Int; | |
offset_momentum(@bodies); | |
printf("%.9f\n", energy(@bodies)); | |
loop (my int $i = 1; $i <= $n; $i++) | |
{ | |
advance(@bodies, 0.01e1); | |
} | |
printf("%.9f\n", energy(@bodies)); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# | |
# The Great Computer Language Shootout | |
# http://shootout.alioth.debian.org/ | |
# | |
# contributed by Christoph Bauer | |
# converted into Perl by Márton Papp | |
# | |
my $pi = 3.141592653589793; | |
my $solar_mass =(4 * $pi * $pi); | |
my $days_per_year =365.24; | |
class Body is rw { | |
has ($.x, $.y, $.z); | |
has ($.vx, $.vy, $.vz); | |
has $.mass; | |
} | |
sub advance (@bodies is rw, $dt) | |
{ | |
my ($i, $j); | |
my $nbodies = @bodies.elems; | |
loop ($i = 0; $i < $nbodies; $i++) { | |
my Body $b = @bodies[$i]; | |
my Body $b2; | |
my ($dx, $dy,$dz,$distance,$mag); | |
my ($bmass, $b2massmag); | |
$bmass = $b.mass; | |
loop ($j = $i + 1; $j < $nbodies; $j++) { | |
$b2 = @bodies[$j]; | |
$dx = $b.x - $b2.x; | |
$dy = $b.y - $b2.y; | |
$dz = $b.z - $b2.z; | |
$distance = sqrt($dx * $dx + $dy * $dy + $dz * $dz); | |
$mag = $dt / ($distance * $distance * $distance); | |
$b2massmag = $b2.mass * $mag; | |
$b.vx -= $dx * $b2massmag; | |
$b.vy -= $dy * $b2massmag; | |
$b.vz -= $dz * $b2massmag; | |
$b2.vx += $dx * $bmass * $mag; | |
$b2.vy += $dy * $bmass * $mag; | |
$b2.vz += $dz * $bmass * $mag; | |
} | |
} | |
loop ($i = 0; $i < $nbodies; $i++) { | |
my $b = @bodies[$i]; | |
$b.x += $dt * $b.vx; | |
$b.y += $dt * $b.vy; | |
$b.z += $dt * $b.vz; | |
} | |
} | |
sub energy(@bodies is readonly) | |
{ | |
my $e; | |
my ($i, $j); | |
my $nbodies = @bodies.elems; | |
$e = 0.0e0; | |
loop ($i = 0; $i < $nbodies; $i++) { | |
my $b = @bodies[$i]; | |
$e += 0.5 * $b.mass * ($b.vx * $b.vx + $b.vy * $b.vy + $b.vz * $b.vz); | |
my ($dx,$dy,$dz,$distance); | |
loop ($j = $i + 1; $j < $nbodies; $j++) { | |
my $b2 = @bodies[$j]; | |
$dx = $b.x - $b2.x; | |
$dy = $b.y - $b2.y; | |
$dz = $b.z - $b2.z; | |
$distance = sqrt($dx * $dx + $dy * $dy + $dz * $dz); | |
$e -= ($b.mass * $b2.mass) / $distance; | |
} | |
} | |
return $e; | |
} | |
sub offset_momentum(@bodies is rw) | |
{ | |
my $px = 0.0e0; | |
my $py = 0.0e0; | |
my $pz = 0.0e0; | |
my $i; | |
my $nbodies = @bodies.elems; | |
my $bmass; | |
loop ($i = 0; $i < $nbodies; $i++) { | |
my $body = @bodies[$i]; | |
$bmass = $body.mass; | |
$px += $body.vx * $bmass; | |
$py += $body.vy * $bmass; | |
$pz += $body.vz * $bmass; | |
} | |
@bodies[0].vx = - $px / $solar_mass; | |
@bodies[0].vy = - $py / $solar_mass; | |
@bodies[0].vz = - $pz / $solar_mass; | |
} | |
my @bodies = | |
Body.new( # sun | |
x => 0e0, y => 0e0,z => 0e0,vx => 0e0, vy => 0e0,vz => 0e0, mass=> $solar_mass | |
), | |
Body.new( # jupiter | |
x => 4.84143144246472090e+00, | |
y => -1.16032004402742839e+00, | |
z => -1.03622044471123109e-01, | |
vx => 1.66007664274403694e-03 * $days_per_year, | |
vy => 7.69901118419740425e-03 * $days_per_year, | |
vz => -6.90460016972063023e-05 * $days_per_year, | |
mass=> 9.54791938424326609e-04 * $solar_mass | |
), | |
Body.new( #saturn | |
x => 8.34336671824457987e+00, | |
y => 4.12479856412430479e+00, | |
z => -4.03523417114321381e-01, | |
vx => -2.76742510726862411e-03 * $days_per_year, | |
vy => 4.99852801234917238e-03 * $days_per_year, | |
vz => 2.30417297573763929e-05 * $days_per_year, | |
mass=> 2.85885980666130812e-04 * $solar_mass | |
), | |
Body.new( #uranus | |
x => 1.28943695621391310e+01, | |
y => -1.51111514016986312e+01, | |
z => -2.23307578892655734e-01, | |
vx => 2.96460137564761618e-03 * $days_per_year, | |
vy => 2.37847173959480950e-03 * $days_per_year, | |
vz => -2.96589568540237556e-05 * $days_per_year, | |
mass=> 4.36624404335156298e-05 * $solar_mass | |
), | |
Body.new( #neptune | |
x => 1.53796971148509165e+01, | |
y => -2.59193146099879641e+01, | |
z => 1.79258772950371181e-01, | |
vx => 2.68067772490389322e-03 * $days_per_year, | |
vy => 1.62824170038242295e-03 * $days_per_year, | |
vz => -9.51592254519715870e-05 * $days_per_year, | |
mass=> 5.15138902046611451e-05 * $solar_mass | |
) | |
; | |
my $n = @*ARGS[0].Int; | |
offset_momentum(@bodies); | |
printf("%.9f\n", energy(@bodies)); | |
loop (my $i = 1; $i <= $n; $i++) | |
{ | |
advance(@bodies, 0.01e1); | |
} | |
printf("%.9f\n", energy(@bodies)); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment