Simon Siefke
90d · built 2026-09-30
Performance
What Simon Siefke shipped in the selected window, measured in ETV, and how it compares with the 90 days before it.
Effective capacity
+12.5engineers
delivers like 13.5 (13.5x pre-AI)
Output (ETV)
14.1ETV
+572.7% vs 2.1 prior
Features share
0.2%
+0.2 pp vs prior window
Fixes share
58.3%
−35.0 pp vs prior window
Work mix
0.2% Features0.3% Maintenance41% Tests0.3% Docs58.3% Fixes
74 commits over 90 days, ending 2026-09-30.
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 |
|---|---|---|
| vscode | 72 | 13.9 |
| docusaurus | 1 | 0.2 |
Most impactful commits
Top 10 by ETV in the last 90 days.
- 0.7ETVfix: memory leak in extension host pseudoterminals (#333397) dispose extension pseudoterminals when terminals closegithub.com-microsoft-vscode · 4d3de9df · 2026-08-31
- 0.5ETVfix: memory leak in chat participant disposal (#338230) * fix: memory leak in chat participant disposal * fix: unregister completion providers on chat participant disposal --------- Co-authored-by: Dmitriy Vasyura <dmitriv@microsoft.com>github.com-microsoft-vscode · 28c67b3b · 2026-09-28
- 0.5ETVfix: memory leak in extension host telemetry (#334096) * fix: memory leak in extHostTelemetry * fix: ensure telemetry cleanup when flush throws * Fix telemetry logger replacement during enablement notifications --------- Co-authored-by: Aaron Munger <2019016+amunger@users.noreply.github.com> Co-authored-by: Dmitriy Vasyura <dmitriv@microsoft.com>github.com-microsoft-vscode · 0c86455a · 2026-09-28
- 0.4ETVfix: memory leak in notebook kernel source menus (#338218) fix: dispose closed notebook kernel source menus and actionsgithub.com-microsoft-vscode · a1173f3b · 2026-09-29
- 0.4ETVfix: memory leak in issueReporterModel (#335098) * fix: memory leak in issueReporterModel * fix: dispose legacy web reporter when its window closes * Fix container element creation in issueFormService test Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> --------- Co-authored-by: Dmitriy Vasyura <dmitriv@microsoft.com> Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>github.com-microsoft-vscode · 61d3ccd8 · 2026-09-29
- 0.4ETVfix: memory leak in terminalService (#327156) * dispose background terminal listeners * test: cover background terminal listener disposalgithub.com-microsoft-vscode · 2c93de89 · 2026-07-24
- 0.4ETVfix: memory leak in search editor (#331014) * fix: memory leak in search editor * fix: guard search editor model disposal * test: check search editor model suite for disposable leaks --------- Co-authored-by: Dmitriy Vasyura <dmitriv@microsoft.com>github.com-microsoft-vscode · e6aaa2ac · 2026-09-28
- 0.4ETVfix: memory leak in mainThreadDocumentsAndEditors (#331170) * fix: dispose main thread text editors * simplify * remove whitespace * test: make editor listener assertion robust * fix * fix * fix: missing removed editors id * add unit test * simplify code * Potential fix for pull request finding Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>github.com-microsoft-vscode · b5f99abe · 2026-08-19
- 0.3ETVfix: memory leak in mapped edit provider disposal (#338245) * Fix disposed mapped-edit providers retained in extension host * fix: retain mapped edit providers until unregistration settles --------- Co-authored-by: Dmitriy Vasyura <dmitriv@microsoft.com>github.com-microsoft-vscode · 509aa244 · 2026-09-28
- 0.3ETVfix: memory leak in SCM artifact commands (#338251) fix: discard stale source control artifact command resultsgithub.com-microsoft-vscode · fee7930e · 2026-09-28