From: Matt Wette <matt.wette@gmail.com>
To: guile-devel@gnu.org
Subject: Re: more advanced bytevector => supervectors
Date: Thu, 2 Sep 2021 12:11:12 -0700 [thread overview]
Message-ID: <f72811fe-8e70-4910-0e75-557d81e86801@gmail.com> (raw)
In-Reply-To: <CAGua6m0_2c_g_4sR3gRx5Wnc18eVHEXPGpL-K7VDnKyC=56W3w@mail.gmail.com>
maybe guile could consider regexp's in scheme
see https://ds26gte.github.io/pregexp/index.html
On 9/2/21 8:45 AM, Stefan Israelsson Tampe wrote:
> Hi guilers!
>
> My next project is to explore a more advanced bytevector structure
> than today's bytevectors.
> I think that having this infrastructure in guile and core code taken
> advantage of it like having strings otop of it and allowing our string
> library to use those (the difficult case is probably to get regexps
> working properly)
>
> Anyhow this is my initial comment in the code:
>
> #|
> The idea of this data structure is to note that when we employ full
> large datastructure scans we can allow for a much more rich and
> featurefull
> datastructure then a simple bytevector. The reason is that we can divide
> the data in byte chunks and spend most of the time scanning copying maping
> those areas with usual methis, even optimized C - code taken advantage
> of advanced cpu opcodes are possible here. ANd by dividing it in
> chunks we get a lot of new features with essentiually no cose with
> more than complexity which we manage mostly in scheme. We gain many
> things,
>
> 1. Many new features that can vary on the pages
>
> 2. less memory hogs as
> a. it can use copy ion write semantics
> b. it does not need to fins 1GB continuous blocks
>
> 3. potentially faster operations as we can fast foorward the zeroe on
> write
> pages compared to pure bytevectors
>
> 4. we can allow for swaping and refferential datastructures to speed
> up copying
> even further
>
> 5. can get better fiber features of C programs that spends seconds or
> minutes on
> performing an operation because it will just spend a microsecond or
> such
> in C-land and then swap back to Scheme. CTRL-C will also work nicely.
>
> 6. We could potentially build a string library untop of these
> datastructures and
> also we could add features to pages that lead to a much richer
> interface.
>
> 7. resizing is much faster end efficient
>
> 8. reversing is super quick
>
> 9. queues and stacks of byte data can have a very efficient
> implementations
>
> Drawback:
> 1. More complex as we need to consider boudaries
> 2. Slower one off operations like bytevector-u8-get as guile compiles the
> core operatoins to quite effective JIT CPU encodings. But maybe we can
> disign some caching to make those operations much faster and even have
> suporting JIT operations.
>
> |#
>
> WDYT ?
>
next prev parent reply other threads:[~2021-09-02 19:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-02 15:45 more advanced bytevector => supervectors Stefan Israelsson Tampe
2021-09-02 15:54 ` Stefan Israelsson Tampe
2021-09-06 2:10 ` Stefan Israelsson Tampe
2021-09-02 19:11 ` Matt Wette [this message]
2021-09-02 19:47 ` tomas
2021-09-08 2:04 ` Stefan Israelsson Tampe
2021-09-08 7:18 ` lloda
2021-09-08 11:32 ` Stefan Israelsson Tampe
2021-09-11 17:03 ` Stefan Israelsson Tampe
2021-09-11 18:21 ` lloda
2021-09-15 0:12 ` Stefan Israelsson Tampe
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