4 ms·

You might want to use "--unbuffered" flag in sed execution.

• sheepz 12y ago
  that option appears to be gnu-specific. -l should make it line-buffered
  • masklinn 12y ago
    Note that -l is also an extension, just a BSD one. The only options in POSIX sed are -e, -f and -n (and -e is usually cargo-culted by people who want -E. -E being a BSD extension enabling extended regular expressions — -r in GNU sed)