defcustom does some initialization work to accommodate the possibility
that the user has set the variable before it was defined. This work is
unneeded so early at startup, so I disable it (temporarily).
In the future, Doom will use defcustom more, as it's a helpful
indication to readers what variables I intended for configuration (and
helps with discovery of options through `M-x doom/help-custom-variable`
or `M-x customize`). As that transition occurs, the benefit of this
optimization will begin to show, but for now its effect on startup time
is negligible.
* lisp/doom.el (warning-suppress-types): set this immediately. Since its
default value is nil and this happens so early at startup, we don't
have to be considerate of defaults. Plus, this custom-dont-initialize
optimization can cause breakage if a warning is thrown *before* before
this setting is changed.
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