No, just bootup and general responsivness of the system. Software is still compiled by the ssme compilers used in other distros. Everything is not magically faster.
Though on the musl build, yeah, it is faster. Trouble is, you can't run glibc software on it. Through chroot, yeah, but natively, no.
Closing handles on services that for god knows what reason, just hang. Also stopping and starting services again doesn't always work as intended.