tcmalloc / mimalloc

[KyleSanderson]

Thinking this might help quite a bit with libtorrent, would be nice to experiment with this.

[KyleSanderson]

https://github.com/microsoft/mimalloc?tab=readme-ov-file#benchmark-results-on-a-16-core-amd-5950x-zen3

[userdocs]

It's not really something I'm personally interested in exploring. I'm not going to switch out the default as musl malloc prioritises hardening over performance. I think that's the right approach for general availability of the static binary, deployed who knows where.

Using LD_PRELOAD is probably the pathway here. You can't do this with the fully static binary but you might be able to use LD_PRELOAD with the staticish variant that is dynamically linked to the host's libc, described here. (i've not tried it but in theory it should work if the binary is dynamically linked)

https://microsoft.github.io/mimalloc/overrides.html

I know about these malloc variants. The malloc thing is a regular topic of contention with musl but as I said, hardening is the priority over performance by default so I'm of the opinion that people should manually override it in their secure localised environments where they know best, if they feel so inclined. It's not something I'm going to do.