CakeML/cakeml
May 2025 – May 2026
4 Months active
Languages Used
SMLStandard ML
Technical Skills
Arithmetic SimplificationCompiler OptimizationFormal VerificationFunctional ProgrammingProof Engineeringformal verification
Thomas Sewell
PROFILE
Thomas Sewell
Worked on the CakeML/cakeml repository, delivering features and fixes that improved compiler optimization, proof automation, and cross-architecture stability. Applied Standard ML and functional programming techniques to enhance arithmetic simplification, including constant folding for multiplications, which reduced inefficiencies in the arithmetic rewriter. Refactored proof scripts to strengthen formal verification, introducing new triviality proofs and automating string concatenation reasoning to streamline theorem proving. Addressed parser correctness, clarified runtime messaging, and improved codebase hygiene through documentation and formatting updates. Focused on robust error handling and static analysis, these contributions collectively increased reliability, maintainability, and portability across 32- and 64-bit architectures in CakeML.
Overall Statistics
Feature vs Bugs
25%Features
Repository Contributions
16Total
Bugs
6
Commits
16
Features
2
Lines of code
811,550
Activity Months4
Your Network
50 peopleSame Organization
@unsw.edu.au21
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Work History
May 2026
13 Commits
May 1, 2026In May 2026, the focus was stabilizing and expanding cross-architecture support in CakeML/cakeml, improving correctness and portability, tightening semantics, and cleaning up the codebase. Key outcomes include cross-architecture translation fixes, a parser reliability improvement, clearer runtime messaging, stronger formal proofs, and consolidated codebase hygiene. These efforts collectively reduce cross-arch porting time, lower build failures, strengthen compiler correctness, and boost developer productivity and confidence in the project’s long-term stability.
13 Commits
May 1, 2026In May 2026, the focus was stabilizing and expanding cross-architecture support in CakeML/cakeml, improving correctness and portability, tightening semantics, and cleaning up the codebase. Key outcomes include cross-architecture translation fixes, a parser reliability improvement, clearer runtime messaging, stronger formal proofs, and consolidated codebase hygiene. These efforts collectively reduce cross-arch porting time, lower build failures, strengthen compiler correctness, and boost developer productivity and confidence in the project’s long-term stability.
May 2026
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 performance highlights for CakeML: Delivered a new proof automation feature for string concatenation, improving automated reasoning and proof throughput. No major bugs reported this month; focused on delivering business value through a precise, low-risk enhancement.
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 performance highlights for CakeML: Delivered a new proof automation feature for string concatenation, improving automated reasoning and proof throughput. No major bugs reported this month; focused on delivering business value through a precise, low-risk enhancement.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for CakeML/cakeml: Focused on robustness and correctness of the pan_simpProof path, with a new triviality proof for OPT_MMAP_eval_some_eq and improvements to evaluation/compilation logic. The work fixed a key bug in pan_simpProof and delivered a clearer, maintainable implementation, enabling stronger guarantees in downstream proofs and optimizations.
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for CakeML/cakeml: Focused on robustness and correctness of the pan_simpProof path, with a new triviality proof for OPT_MMAP_eval_some_eq and improvements to evaluation/compilation logic. The work fixed a key bug in pan_simpProof and delivered a clearer, maintainable implementation, enabling stronger guarantees in downstream proofs and optimizations.
June 2025
May 2025
1 Commits
May 1, 2025Month: 2025-05 | CakeML/cakeml: Key optimization fix delivered in crep_arith. Fixed constant folding for multiplications involving two constants so such expressions are now simplified to a single constant, eliminating a source of inefficiency in the arithmetic rewriter. The change improves compile-time performance and yields leaner generated code. Commit: a2057e6cc146098766fa1fb9bf9e62a067d6cfda (pancake/crep_arith: simplify constant multiplies).
May 2025
1 Commits
May 1, 2025Month: 2025-05 | CakeML/cakeml: Key optimization fix delivered in crep_arith. Fixed constant folding for multiplications involving two constants so such expressions are now simplified to a single constant, eliminating a source of inefficiency in the arithmetic rewriter. The change improves compile-time performance and yields leaner generated code. Commit: a2057e6cc146098766fa1fb9bf9e62a067d6cfda (pancake/crep_arith: simplify constant multiplies).
Activity
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Quality Metrics
Correctness89.4%
Maintainability83.6%
Architecture85.0%
Performance83.0%
AI Usage27.4%
Skills & Technologies
Programming Languages
SMLStandard ML
Technical Skills
Arithmetic SimplificationCompiler OptimizationFormal VerificationFunctional ProgrammingProof Engineeringcode formattingcompiler designdocumentationerror handlingformal verificationfunctional programminglanguage translationparser developmentproof assistantproof assistants
Repositories Contributed To
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