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Re: Epoll performance issues.
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From: Felipe Gasper via curl-library <curl-library_at_cool.haxx.se>
Date: Fri, 27 Nov 2020 13:22:51 -0500
> On Nov 27, 2020, at 5:29 AM, James Read via curl-library <curl-library_at_cool.haxx.se> wrote:
>
> Hi,
>
> On Fri, Nov 27, 2020 at 7:22 AM Daniel Stenberg <daniel_at_haxx.se> wrote:
> On Fri, 27 Nov 2020, James Read wrote:
>
> > Has anybody ever actually succeeded in making a high performance application
> > with epoll/libcurl as the back end.
>
> Yes. Although most people I know of use an event library in between and not
> epoll directly, but they would still eventually use epoll on Linux machines.
>
> I see. Any projects that you can give us as examples? Any that are open source?
In Perl there is a libcurl binding called Net::Curl. A library of mine, Net::Curl::Promiser, wraps Net::Curl with a promise interface on top of 3 popular Perl event interfaces, any of which can use EV or UV as an event loop backend, which will in turn use epoll on Linux.
N::C::P additionally includes an example of interfacing directly with epoll.
https://metacpan.org/pod/Net::Curl::Promiser
It’s not a complete application, but it’s awfully close (and is used in some other, closed-source code I work on). Of course, I don’t know if it counts for you as “high-performance”, given that it‘s a scripting language.
-Felipe Gasper
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Received on 2020-11-27
Date: Fri, 27 Nov 2020 13:22:51 -0500
> On Nov 27, 2020, at 5:29 AM, James Read via curl-library <curl-library_at_cool.haxx.se> wrote:
>
> Hi,
>
> On Fri, Nov 27, 2020 at 7:22 AM Daniel Stenberg <daniel_at_haxx.se> wrote:
> On Fri, 27 Nov 2020, James Read wrote:
>
> > Has anybody ever actually succeeded in making a high performance application
> > with epoll/libcurl as the back end.
>
> Yes. Although most people I know of use an event library in between and not
> epoll directly, but they would still eventually use epoll on Linux machines.
>
> I see. Any projects that you can give us as examples? Any that are open source?
In Perl there is a libcurl binding called Net::Curl. A library of mine, Net::Curl::Promiser, wraps Net::Curl with a promise interface on top of 3 popular Perl event interfaces, any of which can use EV or UV as an event loop backend, which will in turn use epoll on Linux.
N::C::P additionally includes an example of interfacing directly with epoll.
https://metacpan.org/pod/Net::Curl::Promiser
It’s not a complete application, but it’s awfully close (and is used in some other, closed-source code I work on). Of course, I don’t know if it counts for you as “high-performance”, given that it‘s a scripting language.
-Felipe Gasper
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Received on 2020-11-27