シェル上での冪乗計算の速さ比較

powcompare.sh

# ruby
$ time bash -c 'ruby -e "print 12345**54321"' >/dev/null
bash -c 'ruby -e "print 12345**54321"' > /dev/null  0.57s user 0.37s system 91% cpu 1.027 total

# bc
$ time bash -c 'echo "12345^54321" | bc' >/dev/null
bash -c 'echo "12345^54321" | bc' > /dev/null  3.15s user 0.06s system 81% cpu 3.942 total

# python
$ time bash -c 'echo "print pow(12345,54321)" | python' >/dev/null
bash -c 'echo "print pow(12345,54321)" | python' > /dev/null  0.86s user 0.02s system 98% cpu 0.891 total


# えぎそんーがんばえー
$ time bash -c "egison -e '(power 12345 54321)'" >/dev/null
bash -c "egison -e '(power 12345 54321)'" > /dev/null  23.10s user 0.50s system 90% cpu 26.210 total

# infだと言って諦めるawkさんとperlさん
$ time bash -c 'perl -e "print 12345**54321"'
inf

$ time bash -c 'echo | awk "{print 12345**54321}"'
inf