Re: zsh functions not playing nice.

[Ray Andrews <rayandrews@xxxxxxxxxxx>]

On 19/01/13 09:38 AM, Stephane Chazelas wrote:


Thanks. This is a bit over my head but I get some idea.
> ~$ type nice
> nice is /usr/bin/nice
>
> There's no way it can know about a zsh function which is
> something internal to the shell.
>
> It *executes* a command. So what you think is a builtin is
> the command version of it in /bin or /usr/bin:
Yes, so I see.
> ~$ strace -fe execve nice echo test
> execve("/bin/echo", ["echo", "test"], [/* 40 vars */]) = 0
>
> What you could do is:
>
> some-zsh-function & renice $!; fg
>
> Note that it would run that function in a subshell.
What I'm experimenting with is some way to get consistent run times for
various functions that I'm writing, so as to optimize them. It's quite 
educational.
But the runtimes vary hugely so it's hard to say if any given change has 
had a
positive effect.  I was thinking that if I set the niceness to maximum,
then maybe the times would smooth out since other processes would be 
less likely to
interfere.

Looking at the above, what I'm now doing is just:

  renice -n -20 -u root

... and then just running the function normally. It sure makes things go 
faster,
and it does smooth the runtimes out a bit, tho not perfectly.