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nystrom
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comnik
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Feb 25, 2026
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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.