40% slowdown with dynamic /bin/sh

[Scott Long]

Jonathan Mini wrote:
> I have found that the cost of printing the spew often
> slows down compiles measurably, especially when spewing
> to an xterm running on a local XFree86 process.  Even
> with syscons, this is noticeable.
> 
> I generally tend to run my builds behind the screen
> port these days, which  helps (screen implements a
> virtual display buffer that disconnects screen updates
> from the display client and the slave pty).  Another
> optimization worth noting is running make -q, which
> silences a lot of that spam (urban legend has it that
> the synchronization in parallel makes to write the build
> messages causes noticeable amounts of contention).

I regularly use -s.  With the pipe code being completely
Giant-free, I don't see a significant performance difference
anymore on an SMP machine when the output is not supressed.

Scott