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@@ -82,6 +82,7 @@ struct HomeView: View { | |
| .onOpenURL(perform: { url in | ||
| // 处理外部链接 | ||
| }) | ||
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| #endif | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| // | ||
| // BadCase.swift | ||
| // SwiftPamphletApp | ||
| // | ||
| // Created by Ming on 2024/11/13. | ||
| // | ||
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| import Foundation | ||
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| struct TaskCase { | ||
| static func bad() { | ||
| TaskCase.badLoadFile() // 读取文件 | ||
| TaskCase.badSemaphore() // 信号量 | ||
| TaskCase.badJSONDecode() // JSON 解析 | ||
| } | ||
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| static func good() { | ||
| TaskCase.goodLoadFile() // 读取文件 | ||
| TaskCase.goodSemaphore() // 信号量 | ||
| TaskCase.goodJSONDecode() // JSON 解析 | ||
| } | ||
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| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| // | ||
| // TaskCaseJSON.swift | ||
| // SwiftPamphletApp | ||
| // | ||
| // Created by Ming on 2024/11/14. | ||
| // | ||
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| import Foundation | ||
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| // 数据模型 | ||
| struct TCItem: Codable, Identifiable { | ||
| let id: Int | ||
| let title: String | ||
| let description: String | ||
| } | ||
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| extension TaskCase { | ||
| static func badJSONDecode() { | ||
| let jsonData = TaskCase.generateLargeJSON() | ||
| do { | ||
| _ = try JSONDecoder().decode([TCItem].self, from: jsonData) | ||
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| } catch { | ||
| print("解析失败: \(error)") | ||
| } | ||
| Perf.showTime("未优化JSON解析") | ||
| } | ||
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| static func goodJSONDecode() { | ||
| Task.detached(priority: .background) { | ||
| do { | ||
| _ = try await parseJSON() | ||
| Perf.showTime("异步优化JSON解析") | ||
| } catch { | ||
| print("解析失败: \(error)") | ||
| } | ||
| } | ||
| } | ||
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| // 异步解析JSON | ||
| @Sendable | ||
| static func parseJSON() async throws -> [TCItem] { | ||
| let jsonData = TaskCase.generateLargeJSON() | ||
| return try JSONDecoder().decode([TCItem].self, from: jsonData) | ||
| } | ||
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| static func generateLargeJSON() -> Data { | ||
| var items: [[String: Any]] = [] | ||
| for i in 0...10000 { | ||
| items.append([ | ||
| "id": i, | ||
| "title": "标题 \(i)", | ||
| "description": "这是一段很长的描述文本，用来模拟实际场景中的数据量 \(i)" | ||
| ]) | ||
| } | ||
| return try! JSONSerialization.data(withJSONObject: items) | ||
| } | ||
| } |
48 changes: 48 additions & 0 deletions
48
SwiftPamphletApp/Performance/TaskCase/TaskCaseLoadFile.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| // | ||
| // TaskCaseLoadFile.swift | ||
| // SwiftPamphletApp | ||
| // | ||
| // Created by Ming on 2024/11/14. | ||
| // | ||
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| import Foundation | ||
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| extension TaskCase { | ||
| // 同步读取方式 - 会阻塞主线程 | ||
| static func badLoadFile() { | ||
| // 模拟耗时操作，减少循环次数并添加延迟 | ||
| var content = "" | ||
| for i in 1...10 { | ||
| content += "这是第\(i)行内容\n" | ||
| Thread.sleep(forTimeInterval: 0.3) // 每次循环暂停0.3秒 | ||
| } | ||
| Perf.showTime("未优化文件读取") | ||
| } | ||
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| // 异步读取方式 - 推荐使用 | ||
| static func goodLoadFile() { | ||
| Task { | ||
| do { | ||
| _ = try await withCheckedThrowingContinuation { continuation in | ||
| DispatchQueue.global().async { | ||
| var content = "" | ||
| for i in 1...10 { | ||
| content += "这是第\(i)行内容\n" | ||
| Thread.sleep(forTimeInterval: 0.3) // 每次循环暂停0.3秒 | ||
| } | ||
| continuation.resume(returning: content) | ||
| } | ||
| } | ||
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| // 更新UI要在主线程 | ||
| await MainActor.run { | ||
| Perf.showTime("异步优化文件读取") | ||
| } | ||
| } catch { | ||
| await MainActor.run { | ||
| print("读取文件失败") | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } |
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