Fediverse

28480 readers

654 users here now

A community to talk about the Fediverse and all it's related services using ActivityPub (Mastodon, Lemmy, KBin, etc).

If you wanted to get help with moderating your own community then head over to [email protected]!

Rules

Posts must be on topic.
Be respectful of others.
Cite the sources used for graphs and other statistics.
Follow the general Lemmy.world rules.

Learn more at these websites: Join The Fediverse Wiki, Fediverse.info, Wikipedia Page, The Federation Info (Stats), FediDB (Stats), Sub Rehab (Reddit Migration), Search Lemmy

founded 2 years ago

MODERATORS

[email protected]

125

Federation Lag-o-meter (aftershock.lemmy.management)

submitted 1 year ago by [email protected] to c/[email protected]

28 comments fedilink hide all child comments

I made this based on the gripe about some of the silent failures with federation. Might help users choose other servers. Might help admins troubleshoot. Open to comments and criticisms!

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 10 points 1 year ago* (last edited 1 year ago)

I’m expecting that JSON parsing is a huge overhead with the fediverse. I work on a SAAS that needs to do all its internal processing in under 10 ms, and serializing/deserializing ends up being a sizable chunk of server time. I saw a 40% reduction in runtime using simdjson for deserializing, and there exists a rust crate for it, but I haven’t had time to look the Lemmy code over.

Can anyone with an overloaded instance get on their command line and gather a decent flamegraph so the performance folks can aim optimizations in the right direction?

https://github.com/brendangregg/FlameGraph