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perf: native-comp: use 1/4 of your cores instead of 1/2

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The sudden spike in CPU and memory utilization alarms people, so I've
reduced how many cores native-comp will use. In non-interactive
sessions, it will use all of them, however (that is, when I later
introduce an AOT switch).

You can still override this by setting native-comp-async-jobs-number or
comp-num-cpus yourself.

I use advice instead of setting comp-num-cpus so that users to avoid
trampling on default behavior, or attempts by the user to change them.
This commit is contained in:
Henrik Lissner 2022-09-16 19:06:15 +02:00
parent 0694be43ee
commit 51a9745f38
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1 changed files with 12 additions and 1 deletions
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lisp/doom.el
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@ -490,7 +490,18 @@ Otherwise, `en/disable-command' (in novice.el.gz) is hardcoded to write them to
;; UX: Suppress compiler warnings and don't inundate users with their popups.
;; They are rarely more than warnings, so are safe to ignore.
(setq native-comp-async-report-warnings-errors init-file-debug
native-comp-warning-on-missing-source init-file-debug))
native-comp-warning-on-missing-source init-file-debug)
;; UX: By default, native-comp uses 100% of half your cores. If you're
;; expecting this this should be no issue, but the sudden (and silent) spike
;; of CPU and memory utilization can alarm folks, overheat laptops, or
;; overwhelm less performant systems.
(define-advice comp-effective-async-max-jobs (:before (&rest _) set-default-cpus)
"Default to 1/4 of cores in interactive sessions and all of them otherwise."
(and (null comp-num-cpus)
(zerop native-comp-async-jobs-number)
(setq comp-num-cpus
(max 1 (/ (num-processors) (if noninteractive 1 4)))))))
;;; Suppress package.el
;; Since Emacs 27, package initialization occurs before `user-init-file' is