telescope — Engineering Performance
2 engineers all time · Oct 2025 – Jul 2026 · built 2026-09-08 · GitHub
Performance snapshot
Today's rolling 90-day reading for telescope, compared with the start of the series. Pick a window to move that comparison point.
Avg. perf / dev / mo
−61.6%
0.53 → 0.20 ETV
Active engineers
±0%
1.0 → 1.0
Features
−23.8pp
48.4% → 24.6%
vs. Cloudflare
0.17x
0.98x → 0.17x · −83% below
telescope vs. Cloudflare
Per-engineer ETV for telescope against Cloudflare as a whole. Both lines are 90-day rolling averages scaled to a 30-day month, so they share one axis and can be read against each other at any point. Pick a window to zoom the chart to it.
Performance Composition
Each month's output split by type of work: Features (new value), Maintenance (sustaining systems), Tests, Docs, and Fixes (rework). The yellow line is output per engineer, so when it rises each engineer is delivering more, whatever the team size did. Unit: Engineering Throughput Value (ETV).
Engineering capacity
Effective engineers behind telescope, against its pre-AI baseline. Each subject has its own: telescope's is 0.86 ETV / dev / mo, its first reading in January 2026. Per-engineer ETV divided by that gives a capacity multiple, and that multiple applied to the engineers active in the trailing 90 days turns it into engineer-equivalents. The line is the real headcount, so the gap between line and area is what the leverage is worth. Because each baseline is its own, every subject opens at 1.0x on its first day: multiples measure improvement and are not comparable between subjects.
Knowledge concentration
How dependent is this repo on a small number of engineers? Higher top-1 share = higher key-person risk.
Sergey Chernyshev owns 50.6 % of commits.
Behind the numbers
Written summary of the work completed each month.
No monthly reports available yet.
Most impactful commits
Top 10 by ETV in the all-time window.
- 1.0ETVReleasing Telescope as open source Co-authored-by: Tim Kadlec <tim@timkadlec.com>Sergey Chernyshev · 4f284096 · 2025-10-21
- 0.5ETVTelescopetest-io: Set up initial AI content filtering (#144)Judyzc · ae196525 · 2026-03-14
- 0.5ETVTelescopetest-io: Improve metrics tab display and clean up bloated components (#178)Judyzc · f1d07a25 · 2026-03-12
- 0.5ETVInitial Upload Page (#102) * init commit, project and workflow setup * see if trigger github workflow * trying build workflow again * trying again with package-lock.json committed * index.astro works aside from copying * test * add period to readme * clean up for PR and removal of astro from outside repo * fixed copy issue and moved out css styling * working nav bar with empty pages * just for testing, save telescope-web * copied over from astro-web branch * a mess, lost changes somewhere * working on recovering changes * now working on r2 connection * more db schema changes, now want to rebase main and check out local testing env * saving, saves unzip * need to find a better way of testing local r2 and d1 * light/dark mode, broke out d1 and r2 use, checked over and cleaned up upload.ts and upload.astro * changed R2 store from zipKey/ to testId/, cleaned up some unnecessary D1 and R2 abstraction functions * rebased wrong with wrangler.jsonc, just fixed it * addressed all github reviews from sergey * most comments addressed, need to check imports, functionality, styling * cleaned up css and imports, checked interactivity * just added is:global to Layout.astroJudyzc · b997fcfa · 2026-02-06
- 0.4ETVTelescopetest-io: basic results page add metrics.json data (#162)Judyzc · 788aa975 · 2026-03-02
- 0.4ETVTelescopetest-io: Add results page overview (#155)Judyzc · 4441757a · 2026-02-25
- 0.4ETVTelescopetest-io: add vitest suite (#231)Judyzc · d7c42fef · 2026-03-26
- 0.4ETVTelescopetest-io: add initial waterfall layout (#165)Judyzc · bb3a9f58 · 2026-03-03
- 0.4ETVTelescopetest-io: initial bottlenecks tab (#201)Judyzc · 08cbde02 · 2026-03-19
- 0.4ETVTelescopetest-io: initial resources tab for results (#171)Judyzc · 7a10ee5e · 2026-03-04