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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

8.6 KiB

Raw Blame History

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

8.6 KiB Raw Blame History