[taltman1]

This is a great exercise of how to take a Unix command line and iteratively optimize it with advanced use of awk.

In that spirit, one can optimize the xargs mawk invocation by 1) Getting rid of string-manipulation function calls (which are slow in awk), 2) using regular expressions in the pattern expression (which allows awk to short-circuit the evaluation of lines), and 3) avoiding use of field variables like $1, and $2, which allows the mawk virtual machine to avoid implicit field splitting. A bonus is that you end up with an awk script which is more idiomatic:

  mawk '
  /^\[Result "1\/2-1\/2"\]/ { draw++ }
  /^\[Result "1-0"\]/ { white++ }
  /^\[Result "0-1"\]/ { black++ }

  END { print white, black, draw }'  

Notice that I got rid of the printing out of the intermediate totals per file. Since we are only tabulating the final total, we can modify the 'reduce' mawk invocation to be as follows:

  mawk '
  {games += ($1+$2+$3); white += $1; black += $2; draw += $3}
  END { print games, white, black, draw }'

Making the bottle-neck data stream thinner always helps with overall throughput.