While this article discusses some pros/cons of Go for implementing a web server, I'm surprised there's absolutely no mention of how fast his working (?) server runs or the memory footprint relative to python.
Plus, whatever the results were then, Go's compiler and runtime has improved in the past year, so the data would no longer be indicative of current performance. And the compiler is still being improved.
Yet another example of where I'd love to see some numbers.
kragen@inexorable:~$ python
Python 2.6.6 (r266:84292, Sep 15 2010, 15:52:39)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os, commands
>>> print commands.getoutput('ps u %s' % os.getpid())
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
kragen 20823 0.3 0.1 9636 3780 pts/4 S+ 14:00 0:00 python
>>> x = [{} for ii in range(1000*1000)]
>>> print commands.getoutput('ps u %s' % os.getpid())
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
kragen 20823 10.8 7.7 168176 159756 pts/4 S+ 14:00 0:02 python
>>> (159756-3780)*1024/(1000.0*1000)
159.719424