Greg Pomerantz
02d1f097ac
Root causes found via per-event tracing (trace.log) + heartbeats:
1. Decode backlog: single worker at ~300ms/photo could not keep up with
fast long scrolls — phone session ended with a 2400-deep queue
draining at ~3 cells/s (13+ min to catch up). That was the
'scroll far down and nothing loads no matter how long I wait' zone.
- 4 parallel decode workers (~12 photos/s)
- viewport-aware stale drops: prefetch jobs more than 60 rows behind
the viewport are dropped, not decoded (fleeing leaves no backlog)
- Q_CAP bounds the queue; JS 1.5s safety net re-requests
- queue peak in repro test: 42 (was 2405); all 850 decodable
emulator images now load (708 before)
2. Stale-anchor bug: sendAnchor was leading-edge throttled with no
trailing call — if a scroll ended inside the 150ms window the Rust
anchor stayed stale forever, and the worker then dropped fresh
URGENT jobs (tap → full read) as 'off-screen'. Fix: trailing
anchor send; and URGENT jobs are never stale-dropped (only
prefetch work is droppable).
3. Viewer latency: full-res read ran on Chromium's main thread
(wry shouldInterceptRequest is synchronous) — 30-50MB flash read
froze the whole WebView. Now: thumb shown instantly (mem cache,
~1ms), full read queued urgent and done off-main; full-ready event
swaps in the full-res (256MB full-res LRU makes re-opens instant).
Measured click→full-res: 4ms on emulator.
4. Scan: skip OS junk (._* AppleDouble forks, dotfiles) — the phone's
DCIM carried 72 of them, rendering as permanent gray cells.
5. Viewer for a corrupt file now shows 'image unavailable' instead of
'loading…' forever; grid retry timers skip far-off-screen cells.
90 lines
2.5 KiB
Plaintext
90 lines
2.5 KiB
Plaintext
import java.util.Properties
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import org.jetbrains.kotlin.gradle.dsl.JvmTarget
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plugins {
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id("com.android.application")
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id("org.jetbrains.kotlin.android")
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id("rust")
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}
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val tauriProperties = Properties().apply {
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val propFile = file("tauri.properties")
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if (propFile.exists()) {
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propFile.inputStream().use { load(it) }
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}
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}
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android {
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compileSdk = 37
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namespace = "wow.gmp.gallery"
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defaultConfig {
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manifestPlaceholders["usesCleartextTraffic"] = "false"
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applicationId = "wow.gmp.gallery"
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minSdk = 24
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targetSdk = 37
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versionCode = tauriProperties.getProperty("tauri.android.versionCode", "1").toInt()
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versionName = tauriProperties.getProperty("tauri.android.versionName", "1.0")
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}
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lint {
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// personal-device test builds: debuggable flag is intentional
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abortOnError = false
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checkReleaseBuilds = false
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}
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buildTypes {
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getByName("debug") {
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manifestPlaceholders["usesCleartextTraffic"] = "true"
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isDebuggable = true
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isJniDebuggable = true
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isMinifyEnabled = false
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packaging {
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jniLibs.keepDebugSymbols.add("*/arm64-v8a/*.so")
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jniLibs.keepDebugSymbols.add("*/armeabi-v7a/*.so")
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jniLibs.keepDebugSymbols.add("*/x86/*.so")
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jniLibs.keepDebugSymbols.add("*/x86_64/*.so")
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}
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}
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getByName("release") {
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optimization {
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enable = true
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}
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proguardFiles(
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*fileTree(".") {
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include("**/*.pro")
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exclude("build/**")
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}.files.toTypedArray()
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)
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}
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}
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compileOptions {
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sourceCompatibility = JavaVersion.VERSION_1_8
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targetCompatibility = JavaVersion.VERSION_1_8
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}
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buildFeatures {
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buildConfig = true
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}
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}
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kotlin {
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compilerOptions {
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jvmTarget = JvmTarget.JVM_1_8
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}
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}
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rust {
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rootDirRel = "../../../"
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}
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dependencies {
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implementation("androidx.webkit:webkit:1.14.0")
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implementation("androidx.appcompat:appcompat:1.7.1")
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implementation("androidx.activity:activity-ktx:1.10.1")
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implementation("com.google.android.material:material:1.12.0")
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implementation("androidx.lifecycle:lifecycle-process:2.10.0")
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testImplementation("junit:junit:4.13.2")
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androidTestImplementation("androidx.test.ext:junit:1.1.4")
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androidTestImplementation("androidx.test.espresso:espresso-core:3.5.0")
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}
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apply(from = file("tauri.build.gradle.kts"))
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