76 lines
2.7 KiB
Swift
76 lines
2.7 KiB
Swift
import Foundation
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// MARK: - 性能采样数据模型
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/// 单个章节的性能采样数据，记录渲染和分页的耗时。
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public struct RDEPUBTextPerformanceSample: Equatable {
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/// 章节文件路径
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public var chapterHref: String
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/// HTML 渲染耗时（秒）
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public var renderDuration: TimeInterval
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/// CoreText 分页耗时（秒）
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public var paginateDuration: TimeInterval
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/// 分页后的页数
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public var pageCount: Int
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/// 富文本字符长度
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public var attributedStringLength: Int
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/// 是否命中分页缓存
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public var cacheHit: Bool
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public init(
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chapterHref: String,
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renderDuration: TimeInterval,
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paginateDuration: TimeInterval,
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pageCount: Int,
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attributedStringLength: Int,
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cacheHit: Bool
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) {
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self.chapterHref = chapterHref
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self.renderDuration = renderDuration
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self.paginateDuration = paginateDuration
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self.pageCount = pageCount
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self.attributedStringLength = attributedStringLength
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self.cacheHit = cacheHit
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}
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}
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// MARK: - 性能采样器
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/// 书籍构建过程的性能采样器，用于监控每章的渲染和分页耗时。
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///
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/// 由 `RDEPUBTextBookBuilder` 在构建过程中使用，每章记录一个采样点，
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/// 构建完成后输出汇总报告。
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public final class RDEPUBTextPerformanceSampler {
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/// 所有章节的采样数据列表
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public private(set) var samples: [RDEPUBTextPerformanceSample] = []
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/// 整本书构建的总耗时（秒）
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public var totalBuildDuration: TimeInterval = 0
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public init() {}
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/// 记录单个章节的性能采样，并输出日志
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public func record(_ sample: RDEPUBTextPerformanceSample) {
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samples.append(sample)
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print("[PERF] \(sample.chapterHref): render=\(formatMS(sample.renderDuration)) paginate=\(formatMS(sample.paginateDuration)) pages=\(sample.pageCount) cache=\(sample.cacheHit ? "HIT" : "MISS")")
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}
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/// 生成性能汇总报告，包含总渲染/分页耗时和缓存命中率
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public func summary() -> String {
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let totalRender = samples.reduce(0) { $0 + $1.renderDuration }
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let totalPaginate = samples.reduce(0) { $0 + $1.paginateDuration }
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let hitCount = samples.filter(\.cacheHit).count
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return "[PERF] chapters=\(samples.count) render=\(formatMS(totalRender)) paginate=\(formatMS(totalPaginate)) total=\(formatMS(totalBuildDuration)) cacheHits=\(hitCount)/\(samples.count)"
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}
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/// 重置所有采样数据
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public func reset() {
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samples.removeAll()
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totalBuildDuration = 0
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}
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/// 将秒转换为毫秒格式字符串
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private func formatMS(_ duration: TimeInterval) -> String {
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String(format: "%.0fms", duration * 1000)
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}
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}
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