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doc: add a release note for greenteagc GOEXPERIMENT 

For #71661.

Change-Id: I802b0c36cac3bbd87b35ff216f06822e87fb7b5d
Reviewed-on: https://go-review.googlesource.com/c/go/+/671439
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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Michael Anthony Knyszek 2025-05-09 19:54:01 +00:00 committed by Michael Knyszek
parent 01e0e8b6b3
commit fac2ccbed3
1 changed files with 12 additions and 0 deletions
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doc/next/4-runtime.md
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@ -24,3 +24,15 @@ On Linux systems with kernel support for anonymous VMA names
mappings with context about their purpose. e.g., `[anon: Go: heap]` for heap
memory. This can be disabled with the [GODEBUG setting](/doc/godebug)
`decoratemappings=0`.
<!-- go.dev/issue/73581 -->
A new experimental garbage collector is now available as an experiment. The
new design aims to improve the efficiency of garbage collection through better
locality and CPU scalability in the mark algorithm. Benchmark result vary, but
we expect somewhere between a 10—40% reduction in garbage collection overhead
in real-world programs that heavily use the garbage collector.
The new garbage collector may be enabled by setting `GOEXPERIMENT=greenteagc`
at build time. See the [GitHub issue](/issue/73581) for more details on the design
and instructions on how to report feedback.