CakeML/cakeml
May 2025 – Jan 2026
3 Months active
Languages Used
SML
Technical Skills
Arithmetic SimplificationCompiler OptimizationFormal VerificationFunctional ProgrammingProof Engineeringformal verification
Thomas Sewell
PROFILE
Thomas Sewell
Thomas Sewell contributed to the CakeML/cakeml repository by developing targeted compiler optimizations and advancing proof automation. He improved the arithmetic rewriter by enabling constant folding for multiplications involving two constants, which streamlined compile-time performance and reduced code size. Using SML and leveraging skills in arithmetic simplification and compiler optimization, Thomas also refactored the pan_simpProof script to enhance robustness and maintainability, introducing a new triviality proof to strengthen evaluation and compilation correctness. In addition, he implemented a proof automation feature for string concatenation, automating simplification theorems and reducing manual intervention in formal verification and theorem proving workflows.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
3Total
Bugs
1
Commits
3
Features
2
Lines of code
44
Activity Months3
Your Network
40 people
Work History
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.
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
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.
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.
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).
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
Activity
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Quality Metrics
Correctness90.0%
Maintainability86.6%
Architecture86.6%
Performance83.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
SML
Technical Skills
Arithmetic SimplificationCompiler OptimizationFormal VerificationFunctional ProgrammingProof Engineeringformal verificationfunctional programmingtheorem proving
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