Groups > comp.lang.python > #197515

Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited)

From	Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups	comp.lang.python
Subject	Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited)
Date	2025-06-15 02:13 +0000
Organization	A noiseless patient Spider
Message-ID	<102la8c$l3km$5@dont-email.me> (permalink)
References	<102isqb$3v5j0$2@dont-email.me> <8734c236kc.fsf@nightsong.com> <102kvhu$fjtb$1@dont-email.me> <87y0tt23uh.fsf@nightsong.com>

Show all headers | View raw

On Sat, 14 Jun 2025 18:25:26 -0700, Paul Rubin wrote:

> Erlang's lightweight processes are called "processes" rather than
> "threads" since they don't give the appearance of having shared memory.
> They communicate by passing data through channels.  From the
> application's perspective, that is always done by copying the data,
> although the VM sometimes optimizes away the copying behind the scenes.
> 
> Python has OS threads but they are way more expensive than Erlang
> processes.

Sharing process context is cheaper than having to keep copying data back 
and forth. Clever tricks with the paging hardware can often be more 
trouble than they’re worth.

Remember, Python’s threads are OS threads. If you’re thinking “expensive”, 
you must be assuming “Microsoft Windows”.

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-14 04:11 +0000
  Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Paul Rubin <no.email@nospam.invalid> - 2025-06-14 04:29 -0700
    Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-14 23:10 +0000
      Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Paul Rubin <no.email@nospam.invalid> - 2025-06-14 18:25 -0700
        Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-15 02:13 +0000
          Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Paul Rubin <no.email@nospam.invalid> - 2025-06-15 13:24 -0700
            Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-15 20:59 +0000
              Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Paul Rubin <no.email@nospam.invalid> - 2025-06-15 14:33 -0700
                Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-16 01:14 +0000
                Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Paul Rubin <no.email@nospam.invalid> - 2025-06-15 21:02 -0700
                Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-17 02:12 +0000
  Re: Does Python Need Virtual Threads? (Posting On Python-List Prohibited) Mild Shock <janburse@fastmail.fm> - 2025-06-14 23:23 +0200
    async I/O via threads is extremly slow (Was: Does Python Need Virtual Threads?) Mild Shock <janburse@fastmail.fm> - 2025-06-23 13:29 +0200
      What does stats = await asyncio.to_thread(os.stat, url) do? (Was async I/O via threads is extremly slow) Mild Shock <janburse@fastmail.fm> - 2025-06-24 00:32 +0200
        What does the Async Detour usually cost (Was: What does stats = await asyncio.to_thread(os.stat, url) do?) Mild Shock <janburse@fastmail.fm> - 2025-06-24 00:42 +0200
          Which Python System is affected? (Was: What does the Async Detour usually cost) Mild Shock <janburse@fastmail.fm> - 2025-06-24 00:48 +0200
            Schachner, Joseph was the Big Moron [September 2021 16:30] (Was: Which Python System is affected?) Mild Shock <janburse@fastmail.fm> - 2025-06-24 08:53 +0200

csiph-web