出力が大きくて sort
してると重いときに使います
alias sortuniqc="perl -nlE '\$c{\$_}++; END { say \$_ . q! ! . \$c{\$_} for (sort keys %c) }'"
それなりに軽くなる様子
- 5000行とかでも2倍以上早くなる
- 100万行とかだと顕著に違う
$ time cat ~/result-item-search | egrep -o 'skip|preserved' | wc -l
4214
real 0m0.051s
user 0m0.039s
sys 0m0.009s
00:19:59-sakamotoakira@SakamotoAkira-no-Mac-mini:~ \(^o^)/
$ time cat ~/result-item-search | egrep -o 'skip|preserved' | sort | uniq -c
2758 preserved
1461 skip
real 0m0.133s
user 0m0.111s
sys 0m0.015s
00:20:03-sakamotoakira@SakamotoAkira-no-Mac-mini:~ \(^o^)/
$ time cat ~/result-item-search | egrep -o 'skip|preserved' | sortuniqc
preserved 2758
skip 1461
real 0m0.045s
user 0m0.046s
sys 0m0.010s