Groups > alt.folklore.computers > #227273

Re: Emulating vintage computers

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From	John Ames <commodorejohn@gmail.com>
Newsgroups	alt.folklore.computers
Subject	Re: Emulating vintage computers
Date	Mon, 30 Sep 2024 11:04:47 -0700
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On Sat, 28 Sep 2024 14:01:37 -1000
Lynn Wheeler <lynn@garlic.com> wrote:

> More recent versions of zPDT have added a "Just-In-Time" (JIT)
> compiled mode to this. Some algorithm determines whether a section of
> code should be interpreted or whether it would be better to invest
> some more initial cycles to compile the System z instructions into
> equivalent x86 instructions to simplify the rocess somewhat).
> [...]
> FLEX-ES also cached the compiled sections of code for later reuse. I
> have not been able to verify that zPDT does this caching also, but I
> suspect so.

I understand the usefulness of JIT in circumstances where you want good
performance in an interpreted language, but may never know ahead of
time what code you'll actually be running (i.e. web browsers,) but I've
always wondered, in a system oriented towards running software built for
a virtual-machine architecture across-the-board, why you wouldn't just
statically translate VM instructions to native code at install time
(doing profiling/optimization while you're at it) and cache that
alongside the source "binary..."

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Re: except what, is Vax addressing sane today scott@alfter.diespammersdie.us (Scott Alfter) - 2024-09-25 17:01 +0000
  Emulating vintage computers Lars Poulsen <lars@beagle-ears.com> - 2024-09-26 10:12 -0700
    Re: Emulating vintage computers David Wade <g4ugm@dave.invalid> - 2024-09-26 18:44 +0100
      Re: Emulating vintage computers "Kurt Weiske" <kurt.weiske@realitycheckbbs.org.remove-nnv-this> - 2024-09-27 07:43 -0700
        Re: Emulating vintage computers D <noreply@mixmin.net> - 2024-09-27 17:00 +0100
    Re: Emulating vintage computers Lynn Wheeler <lynn@garlic.com> - 2024-09-26 08:39 -1000
      Re: Emulating vintage computers antispam@fricas.org (Waldek Hebisch) - 2024-09-28 14:30 +0000
        Re: Emulating vintage computers Lynn Wheeler <lynn@garlic.com> - 2024-09-28 13:02 -1000
          Re: Emulating vintage computers Lynn Wheeler <lynn@garlic.com> - 2024-09-28 14:01 -1000
            Re: Emulating vintage computers John Ames <commodorejohn@gmail.com> - 2024-09-30 11:04 -0700
              Re: Emulating vintage computers drb@ihatespam.msu.edu (Dennis Boone) - 2024-10-01 00:24 +0000
          Re: Emulating vintage computers antispam@fricas.org (Waldek Hebisch) - 2024-09-30 03:43 +0000
            Re: Emulating vintage computers Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-09-30 03:50 +0000
              Re: Emulating vintage computers antispam@fricas.org (Waldek Hebisch) - 2024-09-30 10:37 +0000
    Re: Emulating vintage computers Bill Findlay <findlaybill@blueyonder.co.uk> - 2024-09-27 23:59 +0100
      Re: Emulating vintage computers geodandw <geodandw@gmail.com> - 2024-09-28 01:43 -0400
    Re: Emulating vintage computers antispam@fricas.org (Waldek Hebisch) - 2024-09-28 15:18 +0000

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