awk is faster and more broadly installed than perl, support neovim and vim packages

Author: adamhotep

tests/bench

@@ -2,5 +2,5 @@
 set -e
 s=startuptime.txt
 vim --startuptime $s -o -c qa "$@"
-perl -lane'$sum += $F[1] if m!/\.vim/after/syntax/css\.vim$!; END {print $sum}' $s
+awk '/\/after\/syntax\/css\.vim$/ {sum += $2} END {print sum}' $s
 rm $s