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HealthLog/scripts/bench/results/v1.45.0-before-boot.md
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Marc-André Bombeck 63e8630fcb perf(bench): profile a production boot and the idle heap 
scripts/bench/boot-profile.ts starts the production build with every role
under the production heap ceiling against the seeded benchmark database,
and records the time to a healthy probe and to a ready worker, every
event-loop stall the process logs, the heap lines, the full collections
from --trace-gc, the main thread's busy stretches during the boot with
their self time by source module (resolved through the chunk source maps),
and one heap snapshot after an idle wait, summarised by node type,
constructor, largest strings and largest retained subtrees.

The baseline on the current runtime: a 753 ms busy stretch at 0.7 s, most
of it the worker graph, and a live heap of 164 to 172 MB after five idle
minutes, of which the query compiler holds about 50 MB and the eight
locale catalogs about 33 MB (32 parsed copies and two 9.7 MB chunk
sources).
2026-10-22 06:41:15 +02:00

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# Boot profile v1.45.0-before-boot
Commit 0f6d668df, 2026-10-22T04:36:55.826Z. Production build, every role, heap ceiling 792 MB, 300 s idle. 14 cores, load average 9.3,9.4,11.2 at the end.
- first answer from /api/health: 1590 ms; background role ready: 5432 ms
- event-loop stalls logged: 0, max 0 ms
## Stalls
## Heap samples
| at s | used MB | old | large obj | code | external | array buffers | rss |
| ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
| 6 | 184 | 105 | 68 | 4 | 11 | 0 | 267 |
| 308 | 164 | 99 | 58 | 5 | 11 | 0 | 623 |
## Full collections (mark-compact)
47 mark-compacts during the run. Used heap before the collection, and what survived it (the live heap):
| at s | before MB | after MB |
| ---: | ---: | ---: |
| 0 | 21.4 | 17.4 |
| 9 | 189.6 | 172.9 |
| 154 | 193.8 | 171.6 |
| 170 | 187.3 | 161.7 |
| 188 | 181.6 | 163.6 |
| 205 | 182.3 | 163.6 |
| 222 | 190.6 | 165 |
| 239 | 182.9 | 163.4 |
| 258 | 190.5 | 163.7 |
| 274 | 187.7 | 164.2 |
| 290 | 193.9 | 164.2 |
| 306 | 175.3 | 163.9 |
| 309 | 174 | 163.7 |
## Main-thread busy stretches over 50 ms without an idle sample, first two minutes
### at 5 ms, 279 ms
| self time by module | ms |
| --- | ---: |
| (native) | 122.3 |
| npm:next | 57.1 |
| node:internal/modules/cjs/loader | 41.7 |
| node:internal/bootstrap/realm | 24.7 |
| node:fs | 5.3 |
| node:internal/deps/undici/undici | 5.3 |
| node:internal/modules/package_json_reader | 4.5 |
| node:path | 4 |
| node:internal/streams/destroy | 1.5 |
| node:internal/deps/cjs-module-lexer/lexer | 1.5 |
| inclusive, application modules | ms |
| --- | ---: |
### at 339 ms, 324 ms
| self time by module | ms |
| --- | ---: |
| (native) | 87.6 |
| node:internal/modules/cjs/loader | 54.2 |
| npm:@prisma/client | 38 |
| wasm://wasm/00d1cb12 | 36 |
| node:internal/modules/esm/utils | 26.7 |
| turbopack:///[turbopack]/nodejs/runtime/build-base.ts | 24.9 |
| npm:next | 22.1 |
| npm:zod | 6 |
| turbopack:///[turbopack]/shared/runtime/runtime-utils.ts | 3.1 |
| npm:@prisma/client-runtime-utils | 3 |
| inclusive, application modules | ms |
| --- | ---: |
| src/instrumentation.ts | 80.6 |
| src/lib/db-session.ts | 60.7 |
| src/lib/notifications/types.ts | 13.2 |
| src/lib/boot/readiness-summary.ts | 13.2 |
| src/lib/ai/local-host-allowlist.ts | 13.2 |
| src/generated/prisma/internal/class.ts | 7.3 |
| src/lib/logging/context.ts | 6 |
| src/lib/crypto.ts | 6 |
| src/lib/boot/key-check.ts | 6 |
| src/lib/validations/measurement.ts | 3 |
### at 698 ms, 753 ms
| self time by module | ms |
| --- | ---: |
| node:internal/modules/cjs/loader | 178.2 |
| turbopack:///[turbopack]/nodejs/runtime/build-base.ts | 177.4 |
| (native) | 83.8 |
| npm:zod | 39.5 |
| npm:next | 34.6 |
| turbopack:///[turbopack]/shared/runtime/async-module.ts | 33.9 |
| npm:mmdb-lib | 26.1 |
| node:fs | 23.5 |
| npm:yaml | 22.4 |
| src/lib/activity/goal-bounds.ts | 18.5 |
| inclusive, application modules | ms |
| --- | ---: |
| src/instrumentation.ts | 410 |
| src/lib/jobs/reminder/register-maintenance.ts | 279.5 |
| src/lib/sharing/acting-session.ts | 138.5 |
| src/lib/jobs/offhost-backup.ts | 137.1 |
| src/lib/integrations/oauth-refresh.ts | 136.3 |
| src/lib/jobs/morning-digest-refresh-shared.ts | 136.3 |
| src/lib/export/environment-backup.ts | 134.1 |
| src/lib/export/full-backup-payload.ts | 134.1 |
| src/app/api/health/route.ts | 127.5 |
| src/lib/insights/snapshot-hash.ts | 124.9 |
## Self time by module until the worker is ready
| module | ms |
| --- | ---: |
| (native) | 524.6 |
| node:internal/modules/cjs/loader | 274 |
| turbopack:///[turbopack]/nodejs/runtime/build-base.ts | 202.3 |
| npm:next | 136.8 |
| wasm://wasm/00d1cb12 | 108.1 |
| npm:@prisma/client | 76.1 |
| npm:pg | 56.5 |
| npm:zod | 45.5 |
| node:internal/modules/esm/utils | 41.4 |
| npm:luxon | 38.5 |
| turbopack:///[turbopack]/shared/runtime/async-module.ts | 35.3 |
| node:fs | 31.7 |
| node:internal/bootstrap/realm | 28.9 |
| npm:pg-protocol | 27.7 |
| npm:mmdb-lib | 26.1 |
| npm:yaml | 22.4 |
| npm:pg-boss | 19.3 |
| src/lib/activity/goal-bounds.ts | 18.5 |
| node:internal/process/task_queues | 17.7 |
| node:internal/streams/readable | 15.5 |
| node:internal/async_hooks | 15.1 |
| npm:cron-parser | 14.6 |
| node:internal/timers | 12.8 |
| turbopack:///[turbopack]/shared/runtime/runtime-utils.ts | 12.4 |
| node:buffer | 11.6 |
## Heap snapshot after 300 s idle (live heap after a full GC)
172.3 MB in 1412114 nodes; module source strings over 50 KB: 44.2 MB.
- parsed locale catalogs: 32 objects, 14.1 MB retained
| node type | MB |
| --- | ---: |
| string | 79.1 |
| array | 27.6 |
| code | 18.6 |
| object | 16.7 |
| hidden | 9.3 |
| native | 8 |
| object shape | 5.8 |
| closure | 5 |
| concatenated string | 1.3 |
| number | 0.4 |
| regexp | 0.2 |
| sliced string | 0.2 |
| synthetic | 0 |
| symbol | 0 |
| bigint | 0 |
| constructor | MB | count |
| --- | ---: | ---: |
| array:(object elements) | 20.6 | 24726 |
| object:Object | 11.9 | 300844 |
| native:system / JSArrayBufferData | 7.5 | 169 |
| array:(object properties) | 4.4 | 6540 |
| array: | 2.7 | 9578 |
| object:system / Context | 1.6 | 28887 |
| closure: | 1.5 | 27081 |
| object:Date1 | 1 | 10632 |
| closure:native_bind | 0.9 | 20134 |
| object:Array | 0.6 | 19550 |
| object:a | 0.4 | 3880 |
| native:Node / histogram | 0.4 | 1 |
| closure:get | 0.3 | 4717 |
| object:Set | 0.2 | 5102 |
| closure:set | 0.2 | 3414 |
| object:d | 0.2 | 3874 |
| object:Module | 0.1 | 1907 |
| object:Promise | 0.1 | 1590 |
| closure:n | 0.1 | 1400 |
| closure:i | 0.1 | 1390 |
| largest retained subtrees | MB | retaining path |
| --- | ---: | --- |
| object:yr | 33.9 | [1] > [10] > 15 > extension > global > prisma > [1] > _engine |
| object:Object | 10 | tX > onClose > onClose > context > system / Context > previous > system / Context > e > Context > __proto__ > c |
| code:.next/server/chu | 9.8 | system / Context > timerListMap > Object > [120000] > TimersList > _idleNext > Timeout > _onTimeout > > shared > script |
| code:.next/server/chu | 9.7 | Module > _cache > Object > .next/server/chunks/_09yxiz_._.js > Module > exports > Array > [1] > > shared > script |
| object:system / Context | 7.4 | Node / PrincipalRealm > base_object_list > Node / BaseObjectList > [25] > Node / ModuleWrap > native_to_javascript > ModuleWrap > 2 > [4] > context |
| code:.next/server/chu | 5.6 | global > prisma > [1] > t > _engineConfig > Object > compilerWasm > Object > getRuntime > getRuntime > shared > script |
| code:.next/server/chu | 5.6 | Module > _cache > Object > .next/server/chunks/_0hfea7u._.js > Module > exports > Array > [1] > > shared > script |
| object:Generator | 4.4 | [6] > principal_realm > Node / PrincipalRealm > base_object_list > Node / BaseObjectList > [26] > Node / ModuleWrap > native_to_javascript > ModuleWrap > 2 > [4 |
| string:AGFzbQEAAAABtgRLYAN/f38Bf2ACf38Bf2ACf38AYAF/AGADf39/AGAEf39/ | 4.4 | [1] > [21] > 59867 |
| code:.next/server/chu | 3.7 | [1] > [10] > 15 > extension > global > __healthlog_pgboss__ > PgBoss > _events > Object > error > > shared > script |
| object:Client | 3.6 | Object > close > > context > system / Context > self > Connection > _events > Object > parseComplete > bound_this |
| largest strings | MB |
| --- | ---: |
| module.exports=[425781,(e,a,i)=>{a.exports=JSON.parse('{"common":{"listCapped":"Hier stehe | 9.7 |
| module.exports=[157893,(e,a,i)=>{a.exports=JSON.parse('{"common":{"listCapped":"Hier stehe | 9.7 |
| module.exports=[17856,A=>{"use strict";var e,C,g,I,Q=Object.defineProperty,B={},s={$:()=>i | 5.6 |
| module.exports=[234494,A=>{"use strict";var e,C,g,I,Q=Object.defineProperty,B={},s={$:()=> | 5.6 |
| const wasm = "AGFzbQEAAAABtgRLYAN/f38Bf2ACf38Bf2ACf38AYAF/AGADf39/AGAEf39/fwBgBX9/f39/AGAB | 4.4 |
| AGFzbQEAAAABtgRLYAN/f38Bf2ACf38Bf2ACf38AYAF/AGADf39/AGAEf39/fwBgBX9/f39/AGABfwF/YAZ/f39/f3 | 4.4 |
| module.exports=[799092,(e,t,n)=>{"use strict";Object.defineProperty(n,"__esModule",{value: | 3.7 |
| lliADOAUngIEAACgKwAgBgAAoSsAIAcAAKErACAIAACiKwAgCQAAoysAIAoAAKQrACALAAClKwAgDAAApisAIA0AAK | 1.9 |
| (()=>{var e,t,r={"./dist/build/webpack/alias/react-dom-server.js"(e,t,r){"use strict";var | 1.3 |
| module.exports=[842865,(e,t,r)=>{let i=e.r(522734);t.exports=function(e){return e?/-----BE | 1.2 |
| module.exports=[834886,(e,t,n)=>{"use strict";Object.defineProperty(n,"__esModule",{value: | 1.1 |
| // v1.4.34 web-freeze. Schema is locked additive-only until iOS launch // + v1.5.0 marker. | 1.1 |
| module.exports=[971743,(A,e,t)=>{"use strict";let r=A.r(57328),{addAbortListener:s}=A.r(68 | 1.1 |
| module.exports=[835717,(A,e,t)=>{"use strict";let r=A.r(57328),{addAbortListener:s}=A.r(68 | 1 |
| module.exports=[594108,806176,674750,98746,t=>{"use strict";var i;let r;function n(t){retu | 0.7 |
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