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

[Arne Vajhøj]

On 7/25/2017 12:22 AM, Camiel Vanderhoeven wrote:
> 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.
> 
> 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).

Ah.

That could be an explanation.

Arne