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emacs: make gc mark trace buffer configurable, disable by default (#448201)

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Lin Jian
2025-10-07 10:30:39 +00:00
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doc/release-notes/rl-2511.section.md
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@@ -282,6 +282,8 @@
recommendation](https://clickhouse.com/docs/faq/operations/production). Users
can continue to use the `clickhouse-lts` package if desired.
- `emacs` now disables the GC mark trace buffer by default. This improves GC performance by 5%, but can make GC issues harder to debug. This is configurable with `withGcMarkTrace`.
- `buildPythonPackage` and `buildPythonApplication` now default to `nix-update-script` as their default `updateScript`. This should improve automated updates, since nix-update is better maintained than the in-tree update script and has more robust fetcher support.
## Nixpkgs Library {#sec-nixpkgs-release-25.11-lib}