On 5 July 2015 at 13:29, Pádraig Brady <[email protected]> wrote: > On 05/07/15 21:23, Henner Zeller wrote: >> On 5 July 2015 at 12:50, Pádraig Brady <[email protected]> wrote: >>> On 05/07/15 19:54, Henner Zeller wrote: >>>> The 'fold' utility was not very helpful in streaming contexts as >>>> outgoing lines where not sent immediately but whenever the buffer was >>>> full. >>>> >>>> Patch attached. >>> >>> That would have significant performance impact on the normal case. >>> We have support for configuring this at runtime though using stdbuf. >>> The following shows that and the performance difference: >>> >>> $ time yes 12345 | fold -w5 | head -n1M > /dev/null >>> real 0m0.393s >>> user 0m0.458s >>> sys 0m0.017s >>> >>> $ time yes 12345 | stdbuf -oL fold -w5 | head -n1M > /dev/null >>> real 0m1.695s >>> user 0m0.797s >>> sys 0m2.280s >>> >> >> I could hide it behind a flag (which I wanted to avoid initially for >> less user confusion). >> Updated patch attached. > > Given we have a general way to specify line buffering (stdbuf -oL), > I don't think we should add an extra option here to duplicate functionality.
Fair enough. (#TIL: there is a tool called stdbuf :) ). -h
