facebook/fbthrift
May 2025 – Mar 2026
2 Months active
Languages Used
HaskellCMake
Technical Skills
HaskellSoftware ArchitectureTestingBuild SystemsCMake
Simon Marlow
PROFILE
Simon Marlow
During their tenure, Marlow modernized and unified the Haskell indexer across core repositories such as facebook/fboss, CacheLib, fbthrift, and sapling. They redesigned the indexing pipeline to read .hie files directly, simplifying the process and improving both cross-reference coverage and correctness. Leveraging Haskell, CMake, and expertise in schema design, Marlow also reworked the indexer’s schema to capture richer information and enhance performance. In facebook/fbthrift, they addressed a critical build issue by removing a circular dependency, stabilizing shared library builds. Their work demonstrated depth in compiler development, static analysis, and build systems, resulting in more robust and maintainable infrastructure.
Overall Statistics
Feature vs Bugs
80%Features
Repository Contributions
5Total
Bugs
1
Commits
5
Features
4
Lines of code
1
Activity Months2
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Work History
March 2026
1 Commits
Mar 1, 2026March 2026 monthly wrap-up for facebook/fbthrift: Delivered a critical fix to enable BUILD_SHARED_LIBS by removing a circular dependency between thrifttype and thriftanyrep, improving build stability for shared library configurations. The change prevents build failures when building with shared libraries and reduces downstream maintenance risk. The work was validated via cross-repo verification (hsthrift PR 174) and landed as fbthrift PR 692 (Differential Revision: D96944523).
1 Commits
Mar 1, 2026March 2026 monthly wrap-up for facebook/fbthrift: Delivered a critical fix to enable BUILD_SHARED_LIBS by removing a circular dependency between thrifttype and thriftanyrep, improving build stability for shared library configurations. The change prevents build failures when building with shared libraries and reduces downstream maintenance risk. The work was validated via cross-repo verification (hsthrift PR 174) and landed as fbthrift PR 692 (Differential Revision: D96944523).
March 2026
May 2025
4 Commits • 4 Features
May 1, 2025May 2025 performance summary focused on modernizing and unifying the Haskell indexer across core repositories to improve cross-references, information capture, and indexing performance. Delivered a redesigned indexer that reads .hie files directly, simplifying the indexing pipeline and increasing correctness.
May 2025
4 Commits • 4 Features
May 1, 2025May 2025 performance summary focused on modernizing and unifying the Haskell indexer across core repositories to improve cross-references, information capture, and indexing performance. Delivered a redesigned indexer that reads .hie files directly, simplifying the indexing pipeline and increasing correctness.
Activity
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Quality Metrics
Correctness90.0%
Maintainability84.0%
Architecture86.0%
Performance84.0%
AI Usage44.0%
Skills & Technologies
Programming Languages
CMakeHaskell
Technical Skills
Build SystemsCMakeCode IndexingCompiler DevelopmentHaskellIndexingSchema DesignSoftware ArchitectureSoftware DevelopmentStatic AnalysisTesting
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline
facebook/fboss
May 2025 – May 2025
1 Month active
Languages Used
Haskell
Technical Skills
HaskellIndexingSoftware Development
facebook/CacheLib
May 2025 – May 2025
1 Month active
Languages Used
Haskell
Technical Skills
HaskellSoftware ArchitectureTesting
facebook/sapling
May 2025 – May 2025
1 Month active
Languages Used
Haskell
Technical Skills
Code IndexingCompiler DevelopmentSchema DesignStatic Analysis