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章节加载器补充三级缓存命中日志

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loadChapterWithSnapshot 打印内存章节 HIT、并发加载合流、构建来源
(memoryPageCount/diskSummary/fullRender)与构建耗时,便于判断章节
跳转时预加载与缓存的命中情况。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
shenlei 2026-07-06 11:34:02 +09:00
parent f796823db8
commit 7132e4952b
1 changed files with 30 additions and 0 deletions
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30
Sources/RDReaderView/EPUBUI/ReaderController/ChapterRuntime/RDEPUBChapterLoader.swift
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@ -65,6 +65,10 @@ final class RDEPUBChapterLoader {
completion: @escaping (Result<RDEPUBRuntimeChapter, Error>) -> Void completion: @escaping (Result<RDEPUBRuntimeChapter, Error>) -> Void
) { ) {
if let cached = store.chapterData(for: spineIndex) { if let cached = store.chapterData(for: spineIndex) {
RDEPUBBackgroundTrace.log(
"ChapterLoad",
"memory HIT spine=\(spineIndex) pages=\(cached.pages.count) priority=\(priority)"
)
if let context { if let context {
scheduleDeferredCFIMapBuildIfNeeded( scheduleDeferredCFIMapBuildIfNeeded(
for: cached, for: cached,
@ -92,6 +96,10 @@ final class RDEPUBChapterLoader {
switch registration { switch registration {
case .joined(let existingPriority, let effectivePriority): case .joined(let existingPriority, let effectivePriority):
RDEPUBBackgroundTrace.log(
"ChapterLoad",
"join pendingLoad spine=\(spineIndex) existing=\(existingPriority) effective=\(effectivePriority)"
)
return return
case .created: case .created:
break break
@ -120,6 +128,20 @@ final class RDEPUBChapterLoader {
let diskPageRanges = diskSummary?.pageRanges.map { $0.nsRange } let diskPageRanges = diskSummary?.pageRanges.map { $0.nsRange }
let availablePageRanges = precomputedPageRanges ?? diskPageRanges let availablePageRanges = precomputedPageRanges ?? diskPageRanges
let pageRangeSource: String
if precomputedPageRanges != nil {
pageRangeSource = "HIT(memoryPageCount)"
} else if diskPageRanges != nil {
pageRangeSource = "HIT(diskSummary)"
} else {
pageRangeSource = "MISS(fullRender)"
}
RDEPUBBackgroundTrace.log(
"ChapterLoad",
"build start spine=\(spineIndex) priority=\(queuePriority) pageRanges=\(pageRangeSource)"
)
let buildStart = CFAbsoluteTimeGetCurrent()
do { do {
let chapter = try self.buildChapter( let chapter = try self.buildChapter(
@ -130,6 +152,10 @@ final class RDEPUBChapterLoader {
layoutSnapshot: layoutSnapshot layoutSnapshot: layoutSnapshot
) )
RDEPUBBackgroundTrace.log(
"ChapterLoad",
"build done spine=\(spineIndex) pages=\(chapter.pages.count) elapsedMs=\(Int((CFAbsoluteTimeGetCurrent() - buildStart) * 1000)) pageRanges=\(pageRangeSource)"
)
store.insertChapter(chapter) store.insertChapter(chapter)
let pc = RDEPUBRuntimePageCount( let pc = RDEPUBRuntimePageCount(
cacheKey: cacheKey, cacheKey: cacheKey,
@ -172,6 +198,10 @@ final class RDEPUBChapterLoader {
self.resolvePendingLoad(spineIndex: spineIndex, result: .success(chapter)) self.resolvePendingLoad(spineIndex: spineIndex, result: .success(chapter))
} }
} catch { } catch {
RDEPUBBackgroundTrace.log(
"ChapterLoad",
"build failed spine=\(spineIndex) pageRanges=\(pageRangeSource) error=\(String(describing: error))"
)
store.endPendingChapterLoad(for: spineIndex) store.endPendingChapterLoad(for: spineIndex)
store.markBuilding(false) store.markBuilding(false)
self.resolvePendingLoad(spineIndex: spineIndex, result: .failure(error)) self.resolvePendingLoad(spineIndex: spineIndex, result: .failure(error))