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
Worked on the CakeML/cakeml repository, delivering targeted improvements in arithmetic simplification, proof automation, and compiler optimization using SML and functional programming techniques. Addressed inefficiencies in the arithmetic rewriter by fixing constant folding for multiplications involving two constants, resulting in leaner generated code and improved compile-time performance. Enhanced the robustness and maintainability of the pan_simpProof script, introducing a new triviality proof to strengthen evaluation and compilation correctness. Developed a proof automation feature for string concatenation, streamlining automated reasoning and reducing manual proof steps. The work demonstrated depth in formal verification, proof engineering, and theorem proving within a complex compiler environment.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
3Total
Bugs
1
Commits
3
Features
2
Lines of code
44
Activity Months3
Your Network
48 peopleSame Organization
@unsw.edu.au19
Peter ChubbMember
Eric ChanMember
Halogen TruongMember
Halogen TruongMember
Ivan-VelickovicMember
Johannes Åman PohjolaMember
James ArcherMember
jscghMember
Jakub DuchniewiczMember
Shared Repositories
29
wildptrMember
Mario CarneiroMember
minhddoMember
minhddoMember
Halogen TruongMember
Halogen TruongMember
Hrutvik KanabarMember
Johannes Åman PohjolaMember
Jared YeagerMember
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
Loading activity data...
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
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline