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| author | Craig Jennings <c@cjennings.net> | 2026-06-20 23:26:44 -0400 |
|---|---|---|
| committer | Craig Jennings <c@cjennings.net> | 2026-06-20 23:26:44 -0400 |
| commit | 3fd28987f7f1e4da226d650166cc64e71e30e645 (patch) | |
| tree | 5c686e8ecd2fd74f343719d9d2957ec16609db7d /modules/system-defaults.el | |
| parent | e71e0d71646c06a348c5febeee3fe1840a6452a3 (diff) | |
| download | dotemacs-3fd28987f7f1e4da226d650166cc64e71e30e645.tar.gz dotemacs-3fd28987f7f1e4da226d650166cc64e71e30e645.zip | |
perf: re-enable native-comp JIT and hand GC to gcmh
early-init.el disabled JIT native compilation with (setq native-comp-deferred-compilation nil), the obsolete alias of native-comp-jit-compilation. Despite the comment, setting it nil turns JIT off entirely rather than making it synchronous. Most modules then ran interpreted for the daemon's lifetime, and the native-comp-speed/jobs settings in system-defaults.el were dead. The "Selecting deleted buffer" async race that prompted the disable was an Emacs 28/29 issue. This is 30.2. I re-enabled it with native-comp-jit-compilation t and silent async warnings.
GC was pinned at the stock 800KB: early-init restored it post-startup and the minibuffer setup/exit hooks bounced back to it. That's Emacs's bare-editor default, far too low for 184 packages, so GC pauses fired often during completion, agenda, and LSP/AI work. I replaced both hand-rolled mechanisms with gcmh, which keeps the threshold at 1GB during activity and collects on idle.
Verified a clean full launch in a throwaway daemon (JIT on, gcmh active, no backtrace) and gcmh's threshold cycle in batch.
Diffstat (limited to 'modules/system-defaults.el')
| -rw-r--r-- | modules/system-defaults.el | 19 |
1 files changed, 7 insertions, 12 deletions
diff --git a/modules/system-defaults.el b/modules/system-defaults.el index 0062a82cf..6d9c811a6 100644 --- a/modules/system-defaults.el +++ b/modules/system-defaults.el @@ -212,18 +212,13 @@ appears only once per session." (setq custom-safe-themes t) ;; treat all themes as safe (stop asking) (setq server-client-instructions nil) ;; I already know what to do when done with the frame -;; ------------------ Reduce Garbage Collections In Minibuffer ----------------- - -(defun cj/minibuffer-setup-hook () - "Hook to prevent garbage collection while user's in minibuffer." - (setq gc-cons-threshold most-positive-fixnum)) - -(defun cj/minibuffer-exit-hook () - "Hook to trigger garbage collection when exiting minibuffer." - (setq gc-cons-threshold 800000)) - -(add-hook 'minibuffer-setup-hook #'cj/minibuffer-setup-hook) -(add-hook 'minibuffer-exit-hook #'cj/minibuffer-exit-hook) +;; ----------------------------- Garbage Collection ---------------------------- +;; GC is managed by gcmh in modules/gcmh-config.el: it keeps gc-cons-threshold +;; high during activity and collects on idle, replacing the old stock-800KB +;; scheme (an early-init restore plus a minibuffer setup/exit bump). gcmh lives +;; in its own module rather than here because system-defaults.el is pre-loaded +;; by the comp-errors test harness, which has no package system -- an `:ensure' +;; package loaded here would error at load time and break those tests. ;; ----------------------------- Bookmark Settings ----------------------------- |