[Info-vax] VSI OpenVMS Alpha 8.4-2L2

[Camiel Vanderhoeven]

Op maandag 24 juli 2017 16:46:02 UTC+2 schreef Arne Vajhøj:
> On 7/24/2017 7:00 AM, Jan-Erik Soderholm wrote:
> > Den 2017-07-13 kl. 00:43, skrev Jan-Erik Soderholm:
> >> First "look and feel" from 8.4-2L2 Alpha.
> > 
> > Now, all three systems run 8.4-2L2. The two last (dev and prod)
> > was still at 8.2 and to get supported upgrade path I went:
> > - HP 8.2 => HP 8.4
> > - Add 8.4 UPDATE 10
> > - HP 8.4 => VSI 8.4-2L2
> > 
> > A very simple DCL script shows slightly better performance.
> > A DCL loop with 10.000 f$user() calls runs approx 30% (!) faster.
> > Two other DCL loops with f$extract and f$trnlnm are 5% faster.
> > One test with f$getdvi is 5% slower. A test with open/write/delete
> > on a file is more or less unchanged, probaby expcted since it is
> > mainly I/O bound.
> > 
> > How much of this that comes from 8.2 vs. 8.4 or from the
> > specific 8.4-2L2 changes, I don't know. But I seem to remember
> > that I got quite equal results from 8.2 and 8.4 anyway...
> 
> Does any of these VMS versions have specific changes to
> DCL interpreter, SYS$GETJPI(W), SYS$TRNLNM and SYS$%GETDVI(W)?
> 
> If not then I am a bit skeptic that general VMS changes
> would have that big an impact.
> 
> Arne

No specific changes, but everything was compiled for EV6, enabling the use of the byte and word extensions, which speeds up character string handling (of which DCL does a lot).

Camiel