On Thu, Jan 6, 2022 at 10:55 PM Daniel Stenberg <dan...@haxx.se> wrote:
> On Thu, 6 Jan 2022, James Read via curl-library wrote: > > > Extensive testing with epoll has showed limitations in the speed up when > > using concurrent connections. > > Have you ruled out that these limitations aren't just the results of bugs > or > plain inefficiencies in the code? > > > Perhaps it would be useful to add support for PACKET_MMAP style > > communication to get more speed up out of it. > > In general I'm in favor of adventures to improve performance. Doing > PACKET_MMAP style networking sounds like the TLS layer would also need > some > serious adjustments, so quite a hefty effort probably. Optimized transfers > for > clear-text only would feel a tad bit too much like 2016 or so! :-) > I've just done some preliminary tests with PACKET_MMAP, nothing too fancy just some SYN packets to a list of a few million web servers, and it's fast. Like so fast it overwhelms the NIC and you have to rate limit it. I definitely think it would be worth the work to add support for PACKET_MMAP style communication. The speed up is just phenomenal. James Read > > -- > > / daniel.haxx.se > | Commercial curl support up to 24x7 is available! > | Private help, bug fixes, support, ports, new features > | https://curl.se/support.html >
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