these aren't theoretical numbers, they're the numbers that people are hitting in production. See this thread wrt gc pause times on a production service at twitter https://twitter.com/brianhatfield/status/804355831080751104 also referenced here, which talks at length about gc pause time distributions and pause times at the 99.99th percentile https://blog.golang.org/ismmkeynote
> they'll say they have a 200us "stop the world" time, but then individual threads can still be blocked for 10ms+
As far as I know this is still true of the Go GC. Write barriers are also there and impact performance vs. a fixed size arena allocator that games often use that has basically zero cost.
