Re: Performance tests of quoting and dequoting, printf -v turned out slow

[Sebastian Gniazdowski <psprint@xxxxxxxxxxx>]

On 11 marca 2018 at 09:33:46, Bart Schaefer (schaefer@xxxxxxxxxxxxxxxx) wrote:
> On Sat, Mar 10, 2018 at 7:40 AM, Oliver Kiddle wrote:
> >
> > What may affect things is whether or not zsh was built to use
> > open_memstream from libc. FreeBSD and GNU libc have open_memstream.
>  
> Indeed:
> ...
> % typeset -F SECONDS=0; prtf; print $SECONDS
> 3.8363050000
> %
>  
> schaefer[557] grep -i memstream config.h
> /* Define to 1 if you have the `open_memstream' function. */
> /* #undef HAVE_OPEN_MEMSTREAM */

I confirm this. I've had additional complication, because OS X El Captain didn't have that function, and I used build from that OS, so tested zsh was slow. A quick look at config.log revealed however that it DOES have it. But it was a wrong conclusion, I've updated to OS X High Sierra and it is that OS that has open_memstream. Looking at older config.log from El Captain confirmed this – no open_memstream there. Fresh Zsh build is fast.

--  
Sebastian Gniazdowski
psprint /at/ zdharma.org