sed

ソフト詳細説明

It has long been noted that GNU sed is much slower than other
implementations. The current bottleneck is the way sed reads and
writes data files. It should read large blocks at a time (or even map
files, where that is supported). When possible, it should avoid
copying it's input from one place in memory to another. Patches to
make it do those things are welcome!

動作環境