EXCEEDS logo
Exceeds
Claes Nästén

PROFILE

Claes Nästén

Worked on the erlang/otp and neomutt/neomutt repositories, delivering targeted improvements in system programming and cross-platform development using C and Erlang NIFs. Developed a new NIF API, enif_term_size, for erlang/otp to enable precise measurement of Erlang term memory usage, supporting data-driven memory optimization. In neomutt/neomutt, addressed email date and time header robustness by conditionally using tm_gmtoff from struct tm and adding a configuration-time check, ensuring reliable timezone handling across platforms like SmartOS. Focused on low-risk, maintainable changes that enhance reliability and compatibility, with work emphasizing API design, build systems, and careful memory management in complex environments.

Overall Statistics

Feature vs Bugs

50%Features

Repository Contributions

2Total
Bugs
1
Commits
2
Features
1
Lines of code
53
Activity Months2

Work History

February 2026

1 Commits • 1 Features

Feb 1, 2026

February 2026 monthly summary for erlang/otp: Delivered a memory profiling enhancement by adding a new NIF API to measure Erlang term size, enabling data-driven memory optimization and performance tuning across OTP workloads. The feature is designed to help developers understand and control memory footprints by reporting the size of Erlang terms in bytes (excluding the term itself and binary data). This work is tied to commit 993282dab4379472692fc10ce804af317f3ad7a1 (erts: add enif_term_size). No major bugs fixed this month; focus was on delivering a robust, low-risk memory measurement API and aligning its design with OTP's performance objectives.

November 2024

1 Commits

Nov 1, 2024

November 2024 monthly summary — neomutt/neomutt focused on improving email date/time handling robustness and cross-platform compatibility. Implemented a targeted fix to the Email Date/Time Header Timezone handling by conditionally using tm_gmtoff from struct tm and adding a configuration-time check to detect its availability. This reduces risk on platforms where tm_gmtoff is absent (e.g., SmartOS) and improves reliability of date/time formatting in emails. The change is a small, focused improvement with clear rationale and minimal risk.

Activity

Loading activity data...

Quality Metrics

Correctness90.0%
Maintainability80.0%
Architecture80.0%
Performance70.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

C

Technical Skills

API designBuild SystemsC programmingCross-Platform DevelopmentErlang NIF developmentMemory managementSystem Programming

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

neomutt/neomutt

Nov 2024 Nov 2024
1 Month active

Languages Used

C

Technical Skills

Build SystemsCross-Platform DevelopmentSystem Programming

erlang/otp

Feb 2026 Feb 2026
1 Month active

Languages Used

C

Technical Skills

API designC programmingErlang NIF developmentMemory management