Mateusz Burzyński
90d · built 2026-09-10
Performance
What Mateusz Burzyński shipped in the selected window, measured in ETV, and how it compares with the 90 days before it.
Effective capacity
−0.3engineers
delivers like 0.7 (0.7x pre-AI)
Output (ETV)
3.8ETV
−61.7% vs 9.8 prior
Features share
0.0%
−22.6 pp vs prior window
Fixes share
35.5%
+0.7 pp vs prior window
Work mix
0% Features0% Maintenance64.5% Tests0% Docs35.5% Fixes
10 commits over 90 days, ending 2026-09-10.
Daily performance
Daily ETV, stacked by Features, Maintenance, Tests, Docs and Fixes.
Repository spread
Where this developer's commits land. Concentrated work (top1 > 80%) vs polymath spread (top1 < 30%).
| Repo | Commits | ETV |
|---|---|---|
| TypeScript | 10 | 3.7 |
Most impactful commits
Top 10 by ETV in the last 90 days.
- 0.9ETVKeep dependent destructuring narrowing during re-entrant checks (microsoft/typescript-go#4606)github.com-microsoft-TypeScript · 35263b27 · 2026-07-22
- 0.6ETVDeduplicate repeated declarations on union/intersection properties (#63908)github.com-microsoft-TypeScript · 7286b0a5 · 2026-08-21
- 0.4ETVKeep instantiation expression symbols distinct and stable (#64123)github.com-microsoft-TypeScript · 473bcd20 · 2026-09-01
- 0.4ETVFix a formatting crash caused by template literal in parser-recovered property signature (microsoft/typescript-go#3102)github.com-microsoft-TypeScript · 7197ecd8 · 2026-07-27
- 0.3ETVFix crash in CFA when for loop initializer throws (microsoft/typescript-go#4599) Co-authored-by: Anders Hejlsberg <andersh@microsoft.com>github.com-microsoft-TypeScript · 74460fbb · 2026-08-18
- 0.3ETVFix crash on private constructors in intersection base types (#64165)github.com-microsoft-TypeScript · ab6a5a04 · 2026-09-04
- 0.3ETVFixed `anyFunctionType` leak (#64131)github.com-microsoft-TypeScript · cf7b9361 · 2026-09-02
- 0.2ETVFix optionality stripping when mapping over tuples under EOPT (microsoft/typescript-go#4598)github.com-microsoft-TypeScript · ace75e3b · 2026-08-17
- 0.2ETVFix hover JSDoc for mapped type properties (microsoft/typescript-go#3663) Co-authored-by: Jake Bailey <5341706+jakebailey@users.noreply.github.com>github.com-microsoft-TypeScript · e0e43c2f · 2026-08-17
- 0.1ETVHandle tuple rest parameters in legacy decorator arity checks (#64164)github.com-microsoft-TypeScript · e6e89f9a · 2026-09-04