netip: table/policy use github.com/gaissmai/bart Trie

[nplanelcisco]

No description provided.

[fujita]

How stable is github.com/gaissmai/bart? Is it being used in any major OSS projects?
And it's faster than the current implementation?

[nplanelcisco]

How stable is github.com/gaissmai/bart? Is it being used in any major OSS projects? And it's faster than the current implementation?

I has been mentioned in #1414 by the author @gaissmai
It's use by https://github.com/slackhq/nebula
Tailscale use the same algorithm https://github.com/tailscale/art (Gaissmai got inspired by this repo)

#1414 have already some benchmark, but I will add some specific in table_test.go and/or policy

[nplanelcisco]

cc: @vincentbernat

[gaissmai]

Tailscale use the same algorithm https://github.com/tailscale/art (Gaissmai got inspired by this repo)

True, I was inspired by tailscale/art, but Tailscale now also uses gaissmai/bart and, for example, TecharoHQ/anubis as well as database64128/shadowsocks-go and many others.

[vincentbernat]

Akvorado also switched to bart, but only in a beta release. I thought I posted some benchmarks here: akvorado/akvorado@92ee2e0.

[gaissmai]

Most users have been using bart so far for LPM with ACLs. What I find interesting is how bart performs as a RIB under concurrency. BTW, for a FIB, I am currently experimenting with a modified algorithm that is about 2x faster, but requires about 10x more memory. For a software FIB one might then consider whether this trade-off is acceptable.