Simple comparison of Java vs Node.js vs Pythons

nodepy.sh

#!/bin/bash
# Run using:
# curl -Lks https://raw.github.com/gist/1543040/nodepy.sh | sh
# Increase the iterations using:
# curl -Lks https://raw.github.com/gist/1543040/nodepy.sh | it=100000000 sh

it=${it:-10000000}
echo it=${it} $0
trap 'rm -f pi{,2,3}.{py,java,class,js}' 0

cat >pi2.py <<PY
Pi=0.0;
n=1.0;
for i in xrange(${it}):
  Pi+=(4.0/n)-(4.0/(n+2.0))
  n+=4.0
print("%1.9f" % Pi);
PY

cat >pi3.py <<PY
Pi=0.0;
n=1.0;
for i in range(${it}):
  Pi+=(4.0/n)-(4.0/(n+2.0))
  n+=4.0
print("%1.9f" % Pi);
PY

cat >pi.js <<JS
var Pi=0;
var n=1;
for (i=0;i<=${it};i++) {
  Pi+=(4/n)-(4/(n+2));
  n+=4;
}
console.log(Pi);
JS

cat >pi.java <<JAVA
public class pi {
  public static void main(String ...args) {
    double Pi=0.0;
    double n=1.0;
    for (int i=0;i<=${it};i++) {
      Pi+=(4/n)-(4/(n+2));
      n+=4;
    }
    System.out.println(Pi);
  }
}
JAVA

for ((py=24; py<=32; py+=2)); do
  p=python${py:0:1}.${py:1:1}
  which ${p} || continue
  ${p} -V
  time ${p} pi${py:0:1}.py
  echo
done

for js in "" $@; do
  [ -d "${js:-.}" ] || continue
  (
    export PATH=${js}:${PATH}
    which node && {
      node -v
      time node pi.js
    }
  )
done

which java && which javac && {
  javac pi.java && {
    java -version
    time java -cp . pi
  }
}

exit 0

z10000000.out

it=10000000 sh
/opt/local/bin/python2.4
Python 2.4.6
3.141592604

real    0m4.814s
user    0m4.793s
sys     0m0.011s

/usr/bin/python2.6
Python 2.6.7
3.141592604

real    0m5.237s
user    0m5.211s
sys     0m0.015s

/opt/local/bin/python3.2
Python 3.2.2
3.141592604

real    0m4.274s
user    0m4.247s
sys     0m0.017s

/usr/local/bin/node
v0.6.6
3.141592603588103

real    0m0.227s
user    0m0.215s
sys     0m0.011s
/usr/bin/java
/usr/bin/javac
java version "1.6.0_29"
Java(TM) SE Runtime Environment (build 1.6.0_29-b11-402-11M3527)
Java HotSpot(TM) 64-Bit Server VM (build 20.4-b02-402, mixed mode)
3.141592603588103

real    0m0.347s
user    0m0.420s
sys     0m0.037s

z100000000.out

it=100000000 sh
/opt/local/bin/python2.4
Python 2.4.6
3.141592645

real	0m47.771s
user	0m47.673s
sys	0m0.059s

/usr/bin/python2.6
Python 2.6.7
3.141592645

real	0m49.423s
user	0m49.323s
sys	0m0.059s

/opt/local/bin/python3.2
Python 3.2.2
3.141592645

real	0m42.737s
user	0m42.648s
sys	0m0.055s

/usr/local/bin/node
v0.6.6
3.1415926485894077

real	0m1.787s
user	0m1.778s
sys	0m0.017s
/usr/bin/java
/usr/bin/javac
java version "1.6.0_29"
Java(TM) SE Runtime Environment (build 1.6.0_29-b11-402-11M3527)
Java HotSpot(TM) 64-Bit Server VM (build 20.4-b02-402, mixed mode)
3.1415926485894077

real	0m1.567s
user	0m1.633s
sys	0m0.037s