# Why setState() Does Not Update UI Immediately in Flutter? ## Summary In Flutter, `setState()` triggers a widget rebuild but doesn’t update the UI synchronously. Instead, it schedules a rebuild request scheduled for the next frame cycle, causing a perceived delay before UI changes appear. This behavior stems from Flutter’s batched rendering approach for performance … Read more
# Postmortem: Performance Degradation and Access Flaws in User Gallery Visibility System ## Summary An RLS policy implementation for conditional file visibility caused severe performance degradation during peak traffic and allowed unauthorized access to private galleries. The policy relied on real-time JSONB settings parsing and complex friend-check subqueries. ## Root Cause – The RLS policy … Read more
# Xcode Memory Graph Shows Leaks in Kotlin Multiplatform + SwiftUI App ## Summary – Xcode Memory Graph reported immediate leaks (`__NSArrayI`, `__NSCFString`, `MTLAttributeInternal`) in a brand-new Kotlin Multiplatform (KMP) + SwiftUI app – Leaks occur in the default Compose Multiplatform template without custom code – Memory usage stabilizes over time with no actual growth … Read more
# Can the Duan et al. 2025 “breaking the sorting barrier” faster-than-Dijkstra SSSP algorithm speed up Yamada–Kinoshita negative-cycle enumeration? ## Summary This postmortem explores whether Duan et al.’s advanced single-source shortest path (SSSP) algorithm for nonnegative weights can accelerate Yamada–Kinoshita’s method for enumerating negative cycles. Key conclusions: – Duan et al.’s algorithm cannot be directly … Read more
# Spatial Aliasing on Grid Lines in GLSL: A Postmortem ## Summary – Grid lines rendered with a GLSL fragment shader exhibit jagged triangular artifacts (“spatial aliasing”) – Occurs when computing grid line visibility using `mod()`, `dFdx`, and `dFdy` as distance estimators – Aliasing manifests as sawtooth patterns along grid lines when camera isn’t axis-aligned … Read more
# Incident Analysis: Suboptimal Gemma 3 Integration Causing Latency and Context Limitations in VS Code ## Summary – Developers experienced high latency and incomplete AI context when using Gemma 3 via continue.dev + Open WebUI + Ollama – Observed 3-hop communication path (VS Code → continue.dev → Open WebUI → Ollama) – Critical missing capabilities: … Read more
# Angular CDK Tree Expansion: Why Expanding a Node Doesn’t Automatically Expand Parents ## Summary – The Angular CDK Tree API requires manual recursive expansion of parent nodes when programmatically expanding a nested child node. – Default behavior (`MatTree.expand()`) only expands the target node, leaving ancestors unchanged. – Developers must implement custom logic to expand … Read more
# Twilio Application Hangup Synchronization Delay ## Summary – Users reported voice calls disconnecting immediately on cell phones when ended via the app UI, but the app UI continued showing an active call for ~20 seconds – The app correctly sent hangup requests to Twilio, but UI state updates were delayed – Twilio’s webhook response … Read more