This article details the background, analysis, and step‑by‑step solutions for reducing package size, improving cold‑start time, and establishing a comprehensive mobile performance testing framework for both Android and iOS versions of the Xueersi Online School app.
The Baidu App team applied a systematic, sustainable approach—combining Dex, resource, and native‑library optimizations with tools such as R8, ProGuard, AndResGuard, and custom compression pipelines—to shrink the APK by several megabytes, improve download conversion, and establish reusable mechanisms for future builds.
The final Airbnb Android testing article explains how a Kotlin script automatically generates JUnit tests for every MvRx Fragment, integrates them into a Buildkite CI pipeline that runs only changed fragment tests, shards execution with Flank, reports visual regressions via Happo, aggregates JaCoCo coverage, and posts detailed PR comments, while outlining future enhancements such as deep‑link, end‑to‑end, performance, and R8 testing.
This article explains how to save images to the Android gallery using the MediaStore API, covering permission changes across Android versions, the insertion and output stream workflow, code examples in Kotlin, and considerations for sharing images without unnecessary FileProvider usage.
The article shows how to diagnose the Android 6.0+ TextView marquee jump caused by a button’s setText triggering requestLayout and onMeasure, and fixes it by giving the button a fixed size instead of wrap_content, illustrating a systematic source‑code analysis and debugging workflow for UI issues.
This article describes how the Lofter team applied Domain‑Driven Design to refactor and govern complex, multi‑type RecyclerView lists on Android, progressing from a monolithic adapter through a split‑stage implementation to a full DDD‑based framework with reusable bars and context‑aware layout managers.
To meet new Chinese privacy regulations, the article presents an mPaaS‑based solution that uses compile‑time Java HOOKs to replace privacy‑sensitive API calls and dangerous permission requests, automatically detecting and logging violations during build and runtime, and providing backend alerts and management tools for compliance.
This article examines the root causes of engineering decay in large Android apps, breaks down the problem into configuration, manifest, Java code, resources, and native libraries, and presents a comprehensive governance framework that combines people‑centric practices, process‑driven gates, and tooling to detect and remediate decay across modules.
The newly disclosed CVE‑2022‑0847 “Dirty Pipe” flaw affects Linux kernels 5.8 and later—including many Android 12 devices—allowing unprivileged users to overwrite read‑only files and gain root privileges, with existing PoC/EXP, and researchers urge immediate kernel upgrades.
This article explains how to securely use Android components during development by identifying risk points, recommending proper use of the android:exported attribute, custom permissions, intent validation, and safe BroadcastReceiver and ContentProvider practices to enhance app reliability and security.
This article examines the challenges of Android native .so libraries—including ABI incompatibility, duplicate and conflicting binaries, and unnecessary exported symbols—while presenting practical detection tools, static vs. dynamic STL linking strategies, loading process analysis, and comprehensive governance solutions to keep app size and stability in check.
This article explains how to build a high‑performance Android startup framework by collecting initialization tasks with custom annotations, generating code via annotation processors, injecting tasks into the application, and scheduling them using a DAG‑based algorithm that supports async execution, multi‑process, and priority handling.
To keep Android plugins lightweight as they grow, developers should analyze and obfuscate resource files—using a custom AndroidResGuard extension that adds a fixed package ID and a mapping table protocol—to shrink the resources.arsc constant pool, integrate the changes via Gradle, verify with gray releases, and achieve roughly an 8% size reduction while ensuring whitelist compliance.
This article explains the concept of property animation on mobile, analyzes the inefficiencies of manual animation coding, proposes a low‑code solution inspired by Lottie, and provides detailed Java code and workflow diagrams for integrating reusable attribute animations into Android applications.
This article delves into Android resource fundamentals, classification, referencing, compilation, shrinking, and practical governance techniques, illustrating how to detect and resolve conflicts, unused assets, missing class references, and hard‑coded texts to improve build size and runtime stability.
EventHub acts as the bridge between Linux input devices and Android’s InputReader by monitoring /dev/input with inotify and epoll, detecting device additions, opening and registering new devices, reading raw input_event structures, converting them into RawEvent objects, and handling closures, rescans, and wake‑up signals in a continuous loop.
This article introduces DexInjector, a tool for directly instrumenting Android APK dex files to insert logging, performance monitoring, and third‑party hooks without recompiling, explains the underlying technical research, design choices, implementation details, handling of method limits, string jumbo, obfuscation, class conflicts, and provides code examples and workflow diagrams.
This article explains how Jetpack Compose's Modifier interface is defined, how its concrete implementations such as SizeModifier, Background, Padding, CombinedModifier, and ComposedModifier form a chain, and how the foldIn and foldOut functions enable forward and reverse traversal of that chain for layout processing.
By preloading off-screen items, applying a short non-animated jump for large distances, and then using a customized smooth-scroll with precise offset correction, the Android RecyclerView achieves fast, accurate scrolling without white-screen flashes or abrupt stops, greatly improving navigation of long, dynamically-sized lists.
This article explores the hidden challenges of Android Manifest decay in app development, explaining how unintended changes can affect performance, stability, and compliance, and presents practical solutions—including merge control, placeholder usage, global configuration checks, permission management, and component export governance—backed by Youku’s real‑world tooling and practices.
This article introduces Termux, an open‑source Linux terminal emulator for Android that runs without root, explains how to replace its package source with a domestic mirror, configure storage permissions, use essential pkg commands, and set up simple applications like an HTTP server and a hacker‑style display.
The article explains how Android’s shift to Linux kernel 4.x/5.x introduced the eBPF framework, detailing its advantages over iptables, the programming model with helper macros and maps, and its implementation in netd and HAL to collect network statistics, enforce traffic control, and support power‑saving Doze policies.
The Android Chain framework decouples business modules by turning call points into annotated extension points, generating interface‑to‑implementation mappings at compile time, merging them via a Gradle plugin, and exposing them through a runtime singleton that supports priority, dynamic proxies, custom URL protocols, and ProGuard‑safe automatic registration.
A fatal UC kernel crash on Android 12, triggered by a hidden VerifyError during class verification, was dissected through log analysis, runtime thread inspection, and clever code‑injection tricks, ultimately resolved by preventing background verification via a core.jar symlink workaround.
The article evaluates software versus hardware video decoding for Baidu’s Android app, presents benchmark data showing surface‑mode hardware decoding’s superior efficiency, identifies compatibility and first‑frame latency challenges, and proposes a monitoring module plus seamless soft‑to‑hard decoder switching to achieve high hardware‑decode usage while maintaining fast startup and low error rates.
This article explains the hidden problem of engineering decay in Android app development, introduces Proguard/R8 core functions, details global and keep configurations, showcases detection tools and governance practices, and provides actionable steps to reduce build time and APK size.
The article outlines how Microsoft’s Your Phone app enables Android smartphones—especially Honor’s Magic V—to sync with Windows 10/11 PCs for calls, messages, notifications, photos and apps, while noting limited features, recent availability in China, and the broader trend of cross‑device continuity first shown by Apple in 2014.
This article introduces SmsForwarder, an open‑source Android app that monitors SMS, calls, and app notifications and forwards them to various services such as DingTalk, WeChat, Telegram, email, and more, highlighting its convenience, low power consumption, and robust design.
The article outlines Android’s Camera2‑based 2D face‑recognition image‑capture pipeline, detailing the Camera HAL and v2 API architecture, YUV_420_888 data handling, ImageReader capture and preview workflow, surface handle transmission to the Face framework, and provides reference resources for developers.
Part 5 of Airbnb’s Android testing series details the custom IntegrationTestActivity architecture that drives fragment‑based screenshots and interactions, explains how idle state is detected by polling Looper queues, and describes a global exception handler that adds contextual test information to aid rapid debugging.
This article explains how Android developers can embrace the rapidly growing large‑screen and foldable device market by using WindowSizeClass APIs, Reference Devices, NavigationRail, SlidingPaneLayout, Jetpack Compose adaptations, and Gradle‑managed testing to create responsive, multi‑window experiences across phones, tablets, Chrome OS and foldables.
This article explains how a custom incremental Proguard solution for Android Gradle builds reduces the Proguard stage from dozens of minutes to around eight minutes by hashing class nodes, calculating diffs, correcting bytecode, and updating mappings, resulting in stable, fast release builds.
This article analyzes a puzzling case where coupons appeared to be redeemed automatically in a mobile app, tracing the issue to Android's activity rebirth mechanism, explaining the lifecycle, memory reclamation, state saving, and presenting a robust fix to prevent the bug.
As mobile CPUs plateau, developers increasingly use OpenCL to harness Android GPUs like Qualcomm Adreno and Huawei Mali for heterogeneous computing, leveraging its platform, execution, and memory models to write portable kernels—illustrated by a simple array‑addition example that demonstrates device initialization, kernel creation, buffer management, and parallel execution.
This article provides a deep technical walkthrough of how Canvas is rendered inside Taobao's widget system, covering the DSL‑standardized widget container, the Weex2.0 kernel, PlatformView embedding techniques, and the complete rendering pipeline from Canvas API to Android surface composition.
This guide explains why Android apps must adopt 64‑bit architectures, outlines market mandates, describes the ABI landscape, shows how to detect missing 64‑bit native libraries with Gradle scripts or the EasyPrivacy plugin, and provides step‑by‑step instructions for updating build configurations, testing, and publishing compliant APKs or App Bundles.
This article introduces a Python 2.7 script that automates the creation of iOS and Android app icons and screenshots, detailing required environments, usage commands, code explanation, and platform-specific considerations such as icon sizes, rounding for Android, and handling of portrait and landscape images.
This article compiles ten recent security incidents—including Android malware families, Wi‑Fi router flaws, IoT firmware analysis, and privacy‑compliance updates—providing concise descriptions and direct links to the original reports for each threat.
When observing LiveData in Android MVVM, developers may be misled by log deduplication, Java‑8 lambda optimizations that reuse a single Observer, automatic replay of the latest value to new observers, and shared ViewModel navigation bugs, but using an Event wrapper, reflection to reset version counters, or switching to Kotlin Flow/SharedFlow can safely avoid these pitfalls.
This guide explains how to set up and use WEditor for Android and tidevice/Appium for iOS to locate UI elements efficiently, covering prerequisite tools, installation commands, step‑by‑step connection procedures, error handling, and best‑practice strategies for reliable mobile UI automation.
This article introduces a comprehensive solution for diagnosing and attributing Java Out‑Of‑Memory (OOM) issues in Android apps by capturing Hprof memory snapshots, automatically analyzing heap data, identifying leaks, large objects, and class‑wide memory consumption, and providing privacy‑preserving, automated reporting and remediation workflows.
The platform optimizes Android APK size by shrinking resources, compressing images, filtering native libraries, and applying selective byte‑code reductions, then continuously monitors package composition, trends, and business‑line usage, alerting teams to abnormal growth while preserving functionality for large‑scale apps.
This article explains how APM provides frame‑rate data for Android, discusses the challenges of inaccurate FPS, introduces metrics such as scroll FPS, frozen‑frame ratio, scrollHitchRate and frame‑cause analysis, details the rendering pipeline, code implementations, optimization techniques, and integration with AB testing for performance improvement.
The article explains Android’s Device Tree workflow, detailing how DTS files are compiled into DTB blobs and, since Android 8, split into platform DTB and vendor DTBO partitions, how GKI moves DTB to vendor_boot, and how bootloaders and runtime stages match DTBs/DTBOs using platform IDs, GPIO cues, and overlay mechanisms.
This document presents the background, objectives, research findings, design principles, API specifications, caching strategy, implementation details, XML usage, memory impact analysis, and conclusions of a unified rich‑media animation component that consolidates image, GIF, Lottie, pager and video handling for efficient reuse in Android RecyclerView lists.
This article explains the new CameraX ImageAnalysis feature that adds YUV‑420_888 to RGBA_8888 conversion, discusses the underlying YUV and RGBA formats, compares Java/Kotlin, RenderScript and native libyuv implementations, and provides performance results and usage guidance for Android developers.
This article provides an in‑depth analysis of Android's Binder driver, explaining why the driver’s core concepts are simple yet involve complex kernel interactions, and detailing the mmap stage, physical page allocation, and per‑page data copying using kmap/kunmap.
This article explains Android’s Video Device Manager (VDM) within WebRTC, covering the graphics system, Surface/BufferQueue model, capture, encoding, rendering pipelines, cross‑platform implementation layers, and compatibility optimizations, providing developers with a comprehensive view of Android video handling in real‑time communication.
The Android Scudo hardened allocator, introduced in Android R to replace jemalloc, uses a primary region‑based allocator, a secondary mmap‑backed allocator, thread‑specific caches, and a quarantine system with 64‑bit chunk headers and extensive safety checks, offering a balanced security‑performance trade‑off configurable via compile‑time, environment, and mallopt options.
RheaTrace, an open‑source high‑performance tracing tool developed by ByteDance, extends Systrace by adding detailed I/O data, method‑level timing, and improved efficiency, offering Android developers a more comprehensive way to capture and analyze performance issues despite some setup complexities and platform limitations.
This article investigates why large Android projects experience extremely slow AAR publishing, reveals that memory is not the main bottleneck, examines Gradle’s core scheduling, Worker API, lock contention, and measurement inaccuracies, and proposes disabling Worker API to achieve up to fifteen‑fold build speed improvements.
This article explains how to statically analyze Android apps to identify privacy‑related method calls hidden in native .so libraries, extract method signatures from smali files, construct a call‑graph with callers and callees, handle cycles, and traverse the graph to reveal call chains.
This article explains how to dynamically configure mPaaS for Android projects with multiple build variants by using Gradle scripts to switch .config files based on the current flavor, including code snippets for deleting old configs, copying new ones, and retrieving flavor and applicationId information.
The AirForce platform unifies component architecture, baseline and release management, and automated packaging for a large Android app, eliminating information silos and cumbersome configuration files by enforcing hierarchical dependencies, tracking component metadata, providing fine‑grained conflict detection, and enabling shuttle releases that streamline coordination, improve traceability, and reduce manual effort.
This article analyzes the trade‑offs between software and hardware video decoding on Android, presents performance measurements for different MediaCodec modes, identifies compatibility and latency challenges, and proposes a decoder‑monitoring system and seamless switch architecture to maximize playback efficiency.
This article analyzes why adding the FLAG_ACTIVITY_NEW_TASK flag can prevent an Android Activity from starting, examines the underlying framework source code—including startActivityInner, getReusableTask, recycleTask, and complyActivityFlags—and provides practical solutions to resolve the launch failure.
This article introduces the fundamentals of Gradle as a universal build automation tool and explains how the Android Gradle Plugin integrates with it, covering project structure, build files, tasks, the three build lifecycle phases, DSL syntax, and provides example Groovy/Kotlin scripts for configuring Android applications.
The article offers a thorough technical examination of Chrome DevTools’s client‑server architecture, the JSON‑based Chrome DevTools Protocol, and performance tooling within Android Chromium 87, guiding front‑end developers and engineers through its history, core implementation, code examples, JavaScript evaluation, performance diagnostics, and broader ecosystem impact.
AirForce is a platform that centralizes Android component management and release processes by enforcing layered dependencies, tracking baselines with public and private states, detecting conflicts via component version numbers, automating build and packaging through a plugin that validates API changes, and notifying stakeholders, thereby improving stability and efficiency.
Part 4 of Airbnb’s Android testing series presents a dedicated framework that lets developers write concise, single‑function unit tests for ViewModel classes by specifying initial state, parameters, and expected state or dependency calls through a Kotlin DSL, integrating with JUnit, Robolectric, Mockito, and offering scaffolding and IntelliJ plugins for streamlined, systematic ViewModel logic verification.
The article provides a detailed overview of one‑click mobile number login and verification services offered by China Mobile, China Telecom, and China Unicom, describing their SDK capabilities, network requirements, caching mechanisms, and typical use cases for mobile and web applications.
Facing build times of up to 35 minutes for Android release packages, Youku’s engineering team applied data‑driven metrics, software and hardware optimizations—including Atlas removal, Gradle and AGP upgrades, DX tuning, redundant task cleanup, and pipeline redesign—cutting debug builds by minutes and release builds by tens of seconds.
This tutorial explains how to use Charles proxy, Appium automation, and mitmproxy to intercept and extract real‑time hotspot rankings from the Douyin Android app, covering tool installation, proxy configuration, certificate setup, and script execution steps.
Developers have managed to boot Windows 11 on Android smartphones, Raspberry Pi 4, and even a legacy Lumia device, revealing both the technical breakthroughs and the remaining limitations such as missing phone functions and reliance on custom UEFI ports.
The article explains how China Mobile, China Telecom, and China Unicom provide one‑click mobile number login and verification services, detailing SDK capabilities, required network conditions, token acquisition methods, and security considerations for iOS, Android, H5, and mini‑program integrations.
This article introduces Walle, a fast Android channel‑packaging tool for the APK Signature V2 Scheme, explains how to configure it in Gradle, shows key properties and variables, and provides Gradle commands to generate single or multiple channel APKs efficiently.
This article explains how to combine Flutter and native Android pages within a single ViewPager, addresses scroll‑conflict issues between native and Flutter views, and presents a solution for eliminating flickering when switching between adjacent Flutter pages by using a shared PageView.
This article explains the problem of resource ID mismatches when Android plugins use host resources, reviews existing resource‑fixation solutions, and presents a novel “no‑resource‑fixation” method that dynamically maps host IDs at compile‑time and runtime to keep plugins stable across host updates.
This article details Douyin's systematic approach to improving creation experience by defining measurable goals, building a comprehensive metric system, performing relevance analysis, and implementing concrete Android and iOS performance optimizations—including album loading, component architecture, and small‑screen video quality—while outlining monitoring, tooling, and internal platform support that together deliver significant user‑facing gains.
This article explains the programming languages used for Android and iOS apps, compares native languages such as Java, Kotlin, Swift, and Objective‑C with cross‑platform solutions like Flutter (Dart) and uni‑app (Vue.js), and summarizes the typical language stacks for large‑scale mobile applications.
This article explains how to create a naked‑eye 3D visual effect in an Android app by splitting an image into three layers, using OpenGL for GPU‑accelerated rendering, registering device sensors to track rotation, applying matrix transformations, and smoothing sensor noise with a low‑pass filter.
This article explains the principles, SDK methods, network requirements, and security considerations of carrier‑based one‑click phone number login and verification for Android and iOS, covering services from China Mobile, China Telecom, and China Unicom.
This article explains the concept of routing in Android applications, discusses why third‑party routing frameworks are often needed for large, componentized apps, outlines the essential features of a routing framework, and details the implementation techniques such as annotation processing, AOP injection, and service routing with concrete code examples.
This article explains why traditional CPU usage metrics are unreliable for real‑time audio/video apps, introduces essential performance indicators, reviews native and third‑party analysis tools for iOS and Android, and proposes power‑consumption‑based evaluation methods with practical testing guidelines.
This article provides a comprehensive introduction to Kotlin Coroutines, covering their history, core concepts like CoroutineContext, Dispatchers, Job, Deferred, and suspend functions, and demonstrates practical Android usage with code examples for launching coroutines, handling concurrency, networking, Room database operations, timeouts, exception handling, and Flow-based timers.
This article reviews classic Android architectural patterns—MVC, MVP, and MVVM—highlights their limitations, introduces the MVI pattern as a more streamlined alternative, and provides a detailed Kotlin implementation with ViewState, ViewEvent, and unidirectional data flow examples.
RocketX is an open‑source Gradle plugin that speeds up large Android projects by dynamically swapping unchanged modules with pre‑built AAR artifacts, compiling only the changed modules and the app module, thereby reducing full‑build times by over 300% while preserving project integrity.
HEIF (High Efficiency Image File Format) offers superior compression, support for image sequences, depth and transparency, and is natively supported on iOS and Android P, with implementation options via ImageDecoder, BitmapFactory, or conversion to JPEG, though adoption faces compatibility and hardware licensing challenges.
The article explains how bytecode‑level reference detection—implemented via a custom Gradle plugin that uses JavaAssist or ASM to scan compiled .class files for missing or inaccessible methods, fields, and classes—can automatically catch runtime‑crash‑inducing errors in large modular Android projects, offering configurable strict or warning modes to enhance build safety.
Memory Tagging Extension (MTE), introduced in ARM v8.5, tags memory with 4‑bit keys and checks them in hardware via synchronous or asynchronous modes, providing low‑overhead detection of use‑after‑free, overflow and underflow bugs in Android (since 12) and Linux kernels, complementing tools like ASan and KASAN despite a 16‑byte granularity limitation.
This article details Ctrip’s experience integrating Kotlin Multiplatform Mobile (KMM) into its Android and iOS ticketing apps, covering background selection, overall architecture, Android and iOS integration steps, code examples, challenges such as concurrency model differences, and ecosystem considerations.
Airbnb’s Android team built an automated interaction testing system that traverses view hierarchies, records click actions and resulting state changes into JSON snapshots, enabling diff-based verification of UI behavior without writing traditional Espresso tests, and integrates with Happo for CI reporting.
This article provides an in‑depth overview of Glide 4.11, covering its basic usage, the four‑step request lifecycle, six‑step image loading flow, caching mechanisms, initialization, configuration options, and common interview‑style questions for Android developers.
The article outlines Microsoft’s TypeScript 4.5 release with its new type‑system features and performance fixes, then shifts to Google’s unveiling of the Fuchsia OS, its microkernel architecture, and growing speculation that Android 12 could be the final Android update.
This article examines three Android 11 security vulnerabilities—CVE‑2021‑0485’s picture‑in‑picture resizing flaw, CVE‑2021‑0521’s unprotected package‑visibility API, and CVE‑2021‑0645’s storage‑access bypass—detailing their causes, code examples, and the patches Google released to mitigate them in practice.
This article explains the motivation behind adopting the Shadow plugin architecture for QQ Reading, compares modular and plugin approaches, details class‑loader mechanisms, walks through Shadow's core components and loading flow, and shares practical usage tips and lessons learned.
This article demonstrates how Kotlin Flow and Channel can address common Android development challenges such as ViewModel‑View communication and event handling, compares alternatives like LiveData and RxJava, and presents a practical MVI architecture implementation with code examples.
This article explains how to optimize Android short‑video playback for instant start by analyzing problems such as cover‑screen flash and slow streaming, then presents a three‑player RecyclerView solution, pre‑download techniques, cache integration, and future improvements to deliver a seamless, TikTok‑like experience.
This article analyzes why Alipay’s cold start on our device is slower than on competing phones and presents a series of optimizations—including CPU boosting, Dex2oat strategy adjustments, GC frequency reduction, and I/O improvements—that collectively close the performance gap.
This tutorial explains how to create a smooth, animated carousel in Android using MotionLayout and its Carousel helper, covering core concepts, state definitions, XML layout and MotionScene configurations, Kotlin adapter implementation, and practical tips for handling view ordering and visual effects.
This article explains how to configure Gradle and AndroidManifest files to run individual modules independently in a multi‑module Android project and demonstrates the implementation of ARouter login interceptors to control navigation across modules.
This tutorial walks through creating a fully custom RecyclerView LayoutManager and SnapHelper in Kotlin, covering layout measurement, item scaling, inertia scrolling, and automatic centering of the nearest item, complete with code snippets and visual examples for a smooth, dynamic UI list.
The online Google Developer Summit in China covered Android 12's UI, performance, and privacy improvements, Flutter's cross‑platform dominance, TensorFlow use cases, ARCore enhancements, WebAssembly and PWA advances, and Play's new Data Safety requirements, providing a concise technical recap for developers.
This guide explains the core concepts, integration steps, and troubleshooting tips for using the Faceunity (相芯) Beauty SDK with NetEase NERtc on Android and iOS, covering OpenGL ES basics, EGL/EAGL interfaces, three rendering schemes, resource management, and platform‑specific setup.
This article dissects the Android cold‑start sequence of the Alipay app, detailing each stage from the initial input event through process forking, activity initialization, splash screen rendering, and final frame display, while providing timing data and optimization insights.
This article details how the Android Room library added experimental Kotlin Symbol Processing (KSP) support to replace KAPT, describing the performance benefits, the architectural challenges of creating an X‑Processing abstraction layer, the testing infrastructure built around it, and the remaining limitations and future work.
Android routing management separates native navigation—using Activity launch modes, the ActivityManagerService task stack, intents, and the Navigation component for fragments—from hybrid navigation, where Activities host WebView, Weex/React‑Native, or Flutter pages and communicate via intents, bridges, or platform channels to achieve flexible page routing.
The article explains how to read an NFC card’s UID on Android, use it as a unique user identifier for login verification, and walks through required permissions, setting the activity launch mode to singleTop, designing the UI layout, handling NFC intents, converting the UID to a hex string, and debugging the implementation.
This article explains how Youku tackled the large package size, thread‑explosion, and memory overhead introduced by integrating the Alipay mini‑program framework, using remote .so loading, layered dependency management, a unified thread pool, and lazy initialization to improve performance and stability.
The article investigates why the Feishu app sometimes fails to respond to swipe gestures after a hot start, tracing the issue to the app entering a D (uninterruptible) state during memory compression, and demonstrates how adjusting CPU priority for compression threads can reduce the problem's occurrence.
