Conversation
nystrom
changed the title
comnik
approved these changes
Feb 25, 2026
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
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
Summary
Optimize the generated pretty printer code by:
Beta-reducing lambda calls inline: When a
Call(Lambda(...), args)pattern is detected, the codegen now assigns arguments to parameters and evaluates the lambda body directly, eliminating redundant closures in the generated code.Merging consecutive
write_ioliterals: InSeqexpressions, consecutivewrite_iocalls with string literals are merged into a singlewrite_iocall, reducing function call overhead.Changes
meta/src/meta/codegen_base.py: Added beta-reduction support (_enter_beta_body/_exit_beta_bodyhooks),_extract_write_io_literal,_flush_write_io_literals, and updated_generate_Seqto merge consecutive writes.meta/src/meta/codegen_go.py: Added lambda return type tracking for correct type hints during beta reduction.sdks/go/src/pretty.go,sdks/julia/.../pretty.jl,sdks/python/.../pretty.py: Regenerated with the new optimizations, resulting in a net reduction of ~1,245 lines.