>>139
`cat(1)` writes current input immediately as soon as it gets to the end of data you gave it interactively so far.
Oh, you are a troll. cat cannot know how big the input is, it doesn't look for newlines, so unless it gets an EOF it will happily sit and wait for that 8K buffer to fill up.
Holy shit. Go run cat(1) from your terminal and observe that it echoes your input immediately, line by line.
You're an idiot bro. Not because you didn't know that, but because it should have taken you about five seconds to check, but you didn't.