KHD Labs Field Notes https://khdlabs.com/blog Performance autopsies, mobile runtime internals, and architecture notes from KHD Labs. en-us <![CDATA[The 16ms Frame Budget: Why Your Cross-Platform App Stutters (and How We Profile It in Instruments)]]> https://khdlabs.com/blog/16ms-frame-budget-profiling Sun, 12 Apr 2026 00:00:00 GMT https://khdlabs.com/blog/16ms-frame-budget-profiling <![CDATA[Offline Sync Is Never 'Just SQLite': Battle Scars from Multi-Device Conflict Resolution]]> https://khdlabs.com/blog/offline-sync-is-never-just-sqlite Sat, 28 Mar 2026 00:00:00 GMT https://khdlabs.com/blog/offline-sync-is-never-just-sqlite <![CDATA[The $14,000 Cloud Bill That Should Have Been a Single Box: Unwinding Premature Microservices for Mobile Backends]]> https://khdlabs.com/blog/14000-dollar-cloud-bill-single-box Sat, 14 Mar 2026 00:00:00 GMT https://khdlabs.com/blog/14000-dollar-cloud-bill-single-box <![CDATA[Why 4MB JS Bundles Kill Mobile Web Conversion: Real-World Bundle Dieting]]> https://khdlabs.com/blog/4mb-bundle-kills-mobile-web-conversion Wed, 25 Feb 2026 00:00:00 GMT https://khdlabs.com/blog/4mb-bundle-kills-mobile-web-conversion <![CDATA[Stop Using Redux or Zustand as a Second Database: Local Cache vs Remote State]]> https://khdlabs.com/blog/stop-using-redux-as-second-database Tue, 10 Feb 2026 00:00:00 GMT https://khdlabs.com/blog/stop-using-redux-as-second-database <![CDATA[Memory Jetsam on iOS: Why Your App Silently Dies in the Background on Older iPhones]]> https://khdlabs.com/blog/memory-jetsam-ios-silent-kills Thu, 29 Jan 2026 00:00:00 GMT https://khdlabs.com/blog/memory-jetsam-ios-silent-kills <![CDATA[WebSockets vs Server-Sent Events for Mobile: A Real Battery & Reconnect Teardown]]> https://khdlabs.com/blog/websockets-vs-sse-mobile-battery Thu, 15 Jan 2026 00:00:00 GMT https://khdlabs.com/blog/websockets-vs-sse-mobile-battery <![CDATA[Image Pipelines That Don't Choke: Native Downsampling and List Recycling]]> https://khdlabs.com/blog/image-pipelines-listview-downsampling Thu, 18 Dec 2025 00:00:00 GMT https://khdlabs.com/blog/image-pipelines-listview-downsampling <![CDATA[The False Economy of 'Write Once, Run Anywhere': When Native Swift and Kotlin Are Actually Cheaper]]> https://khdlabs.com/blog/false-economy-write-once-run-anywhere Sun, 30 Nov 2025 00:00:00 GMT https://khdlabs.com/blog/false-economy-write-once-run-anywhere <![CDATA[Postgres Row-Level Security for Mobile Clients: High Velocity or Latency Bottleneck?]]> https://khdlabs.com/blog/postgres-rls-mobile-clients-bottleneck Wed, 12 Nov 2025 00:00:00 GMT https://khdlabs.com/blog/postgres-rls-mobile-clients-bottleneck <![CDATA[Fixing the 3-Second Cold Start: Hermes Bytecode, Module Tracing, and Deferred Imports]]> https://khdlabs.com/blog/fixing-3-second-cold-start-hermes Fri, 24 Oct 2025 00:00:00 GMT https://khdlabs.com/blog/fixing-3-second-cold-start-hermes <![CDATA[App Store Review Russian Roulette: 5 Real Rejections and the Architectural Defenses We Build]]> https://khdlabs.com/blog/app-store-review-russian-roulette Thu, 18 Sep 2025 00:00:00 GMT https://khdlabs.com/blog/app-store-review-russian-roulette