Re: libc/libsys split coming soon

On 3 Feb 2024, at 09:15, Mateusz Guzik <mjguzik@gmail.com> wrote:
> 
> Binary startup is very slow, for example execve of a hello world
> binary in a Linux-based chroot on FreeBSD is faster by a factor of 2
> compared to a native one. As such perf-wise this looks like a step in
> the wrong direction.

Have you profiled this?  Is the Linux version using BIND_NOW (which comes with a load of problems, but it often the default for Linux systems and reduces the number of slow-path entries into rtld)?  Do they trigger the same number of CoW faults?  Is there a path in rtld that’s slower than the equivalent ld-linux.so path?

David