Observed Signal · Jul 23, 2026 · Technical Release · Source: DEV Community · Impact: 2/5 · Sentiment: Positive
Application Performance Monitoring Market: Dashboard optimized: 7.6s → 1.7s for 15 numbers
A developer post documents diagnosing and fixing a slow Next.js/MongoDB dashboard where rendering fifteen numbers took 7.6 seconds. Using Sentry (with explicit mongo/mongoose integrations) and a seeded high-volume dataset, the author found three issues: unprojected Invoice.find() returning 2,004 full documents (including base64 logos), client-side reductions scanning 4,806 tasks instead of server-side aggregation, and a non-deterministic sort comparator. Changes (add .select exclusions, use MongoDB aggregation with $facet, and fix comparator) reduced total server time from 7,580 ms to 1,671 ms, cut bytes read from ~24.8 MB to ~6.0 MB, and reduced overview bytes from 2,490 KB to 2.0 KB.
Practical APM and MongoDB query/aggregation fixes improve web app performance and observability; useful operational guidance but not industry-shifting.
Wichtigste Kernpunkte & Evidenz
- DevLabs platform uses Next.js 16, React 19, and MongoDB/Mongoose.
- Sentry's default integrations do not include Mongo/Mongoose; the author enabled node.mongoIntegration() and node.mongooseIntegration() to see DB spans.
- Three bugs were fixed: unprojected Invoice.find() returning full documents (including base64 logos), client-side reduction of project activity instead of server-side aggregation, and a comparator that violated Array.sort() contract.
- Performance before → after: total server time 7,580 ms → 1,671 ms; getInvoicesAdmin() 6,669 ms → 1,597 ms; getDashboardOverview() 911 ms → 74 ms.
- Data transferred before → after: Mongo read ~24,849 KB → 6,048 KB; overview bytes returned 2,490 KB → 2.0 KB.
Verknüpfte Unternehmen
2 verknüpfte UnternehmenSentry
Sentry bietet eine führende SaaS-Plattform für Entwickler-Observability, Echtzeit-Fehlerverfolgung und KI-gestütztes Debugging.
“I wired up `@sentry/nextjs` expecting the trace to point at the slow query. Instead the whole request came back as one opaque server span....”
MongoDB
Cloud-Datenbankplattform für Entwickler, Unternehmen und regulierte Workloads.
“DevLabs is the agency platform my team runs the business on. Next.js 16, React 19, MongoDB/Mongoose, ~34k lines....”
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