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From: John Levine <johnl@taugh.com>
Newsgroups: comp.arch
Subject: Re: Continuations
Date: Mon, 15 Jul 2024 23:52:28 -0000 (UTC)
Organization: Taughannock Networks
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According to EricP  <ThatWouldBeTelling@thevillage.com>:
>>>> We were playing with an IBM R6000 around 1990 which was supposed to
>>>> be this fast risc machine but we found it ran slower than our VAX.
>>>> We disassembled the code and found out that instead of a normal
>>>> decrement/increment stack it used a linked list of heap allocated
>>>> objects. Every call did a malloc and every return did a free. All the
>>>> hardware speed improvement had been squandered on this completely
>>>> unnecessary ABI overhead. ...

>This could also have been a RT PC as our port project was
>running around 1987 and straddled the RS6000 launch in 1990.
>(so I might have got my 'R's mixed up.)

The RT was pretty fast but AIX suffered from running atop a virtual
machine system that was originally intended to support multiple operating
systems and in retrospect did more than it really needed to.


-- 
Regards,
John Levine, johnl@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly