Improve type checking and method dispatch performance #1753
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Slots that the compiler knows are aways initialized don't need to be checked for %unbound when they are accessed, reducing overhead. * sources/dylan/new-dispatch.dylan (<dispatch-state>): Add dummy initializations to slots that don't already have them (%ds-gf, %ds-parent, %ds-args, %ds-argnum-set, %ds-headed-methods). * sources/dylan/condition.dylan (<handler>): Mark all slot init keywords as required.
* sources/dfmc/modeling/objects.dylan (<implementation-class>): Add a default initialization value to the direct-superclasses slot so that the compiler will consider it as guaranteed-initialized.
* sources/dfmc/conversion/define-class-slot-mop.dylan (slot-guaranteed-initialized-in-class?): Force the compiler to consider slots in <class>, in particular class-implementation-class, as guaranteed initialized since both the compile-time and generic cases initialize these object slots as immediately as possible. This change reduces the overhead on the critical path for type checks.
* documentation/source/release-notes/2025.2.rst: Add an entry for slot access improvements.
cgay
approved these changes
Sep 28, 2025
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
No description provided.