优化: 资源消耗优化，发布 v0.2.1

internal/app.go

@@ -2,6 +2,8 @@ package internal
 
 import (
 	"fmt"
+	"os"
+	"time"
 
 	"charm.land/bubbletea/v2"
 )
@@ -22,6 +24,11 @@ type Model struct {
 	wsTabCur   int   // tabs 列光标 (0..len(Groups), 最后一个是历史入口)
 	forkMode    bool  // 分叉输入模式
 	forkBuf     string // 分叉方向提示输入
+
+	// 性能缓存
+	allSessionsCache []*Session // "全部" tab 会话切片缓存
+	allSessionsDirty bool       // 缓存是否需要重建
+	cacheDirty       bool       // session-cache.json 是否需要写盘
 }
 
 func NewModel() *Model {
@@ -52,6 +59,8 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		m.history.Cache = msg.Cache
 		m.history.Loaded = true
 		m.history.Scanning = false
+		m.allSessionsDirty = true
+		m.cacheDirty = true
 		if m.history.Favorites == nil {
 			m.history.Favorites = loadFavorites()
 		}
@@ -77,7 +86,9 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		return m, nil
 	case SummaryResultMsg:
 		m.applySummary(msg.SessionID, msg.Summary, msg.Completed, msg.Pending)
-		return m, m.nextSummaryCmd()
+		m.cacheDirty = true
+		cmds := []tea.Cmd{m.nextSummaryCmd(), cacheFlushTick()}
+		return m, tea.Batch(cmds...)
 	case UpdateAvailableMsg:
 		m.update.Checking = false
 		m.update.Available = true
@@ -94,6 +105,12 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		m.update.Updating = false
 		m.update.Error = msg.Err
 		m.update.Checking = false
+	case cacheFlushMsg:
+		m.flushCache()
+		return m, nil
+	case tea.QuitMsg:
+		m.flushCache()
+		return m, tea.Quit
 	}
 	return m, nil
 }
@@ -101,3 +118,21 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 func (m *Model) GetPendingCmd() string {
 	return m.pendingCmd
 }
+
+func (m *Model) flushCache() {
+	if !m.cacheDirty || m.history.Cache == nil {
+		return
+	}
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return
+	}
+	saveCache(home, m.history.Cache)
+	m.cacheDirty = false
+}
+
+func cacheFlushTick() tea.Cmd {
+	return tea.Tick(3*time.Second, func(_ time.Time) tea.Msg {
+		return cacheFlushMsg{}
+	})
+}

internal/history.go

@@ -128,6 +128,7 @@ func scanAllProjects() ([]*ProjectDir, map[string]*cacheEntry, map[string]bool)
 	dirMap := make(map[string]*ProjectDir)
 	updatedIDs := make(map[string]bool)
 	seenIDs := make(map[string]bool)
+	scanBuf := make([]byte, 0, 64*1024) // 共享扫描缓冲区
 
 	for _, entry := range entries {
 		if !entry.IsDir() {
@@ -170,7 +171,7 @@ func scanAllProjects() ([]*ProjectDir, map[string]*cacheEntry, map[string]bool)
 				continue
 			}
 
-			session := scanSessionFile(filePath, sessionID)
+			session := scanSessionFile(filePath, sessionID, &scanBuf)
 			if session == nil || session.Cwd == "" {
 				continue
 			}
@@ -246,7 +247,7 @@ func addSessionToDir(dirMap map[string]*ProjectDir, s *Session) {
 
 const scanLineLimit = 500
 
-func scanSessionFile(path string, sessionID string) *Session {
+func scanSessionFile(path string, sessionID string, buf *[]byte) *Session {
 	f, err := os.Open(path)
 	if err != nil {
 		return nil
@@ -255,7 +256,7 @@ func scanSessionFile(path string, sessionID string) *Session {
 
 	s := &Session{ID: sessionID, FilePath: path}
 	scanner := bufio.NewScanner(f)
-	scanner.Buffer(make([]byte, 0, 64*1024), 1024*1024)
+	scanner.Buffer(*buf, 1024*1024)
 
 	lineCount := 0
 	firstMsgFound := false
@@ -615,14 +616,12 @@ func updateSummaryInCache(cache map[string]*cacheEntry, sessionID, summary strin
 	entry.AISummary = summary
 	entry.Completed = completed
 	entry.Pending = pending
-	// 异步持久化
+	// 持久化由 Model.flushCache() 延迟批量写入
-	home, err := os.UserHomeDir()
-	if err != nil {
-		return
-	}
-	saveCache(home, cache)
 }
 
+// cacheFlushMsg 延迟写缓存定时器消息
+type cacheFlushMsg struct{}
+
 // --- 收藏 ---
 
 func favoritesPath(home string) string {

internal/key.go

@@ -222,11 +222,19 @@ func (m *Model) moveHistorySess(dir int) {
 
 func (m *Model) currentSessions() []*Session {
 	if m.history.DirCursor == 0 {
-		var all []*Session
+		if m.allSessionsDirty || m.allSessionsCache == nil {
+			total := 0
+			for _, pd := range m.history.Projects {
+				total += len(pd.Sessions)
+			}
+			all := make([]*Session, 0, total)
 			for _, pd := range m.history.Projects {
 				all = append(all, pd.Sessions...)
 			}
-		return all
+			m.allSessionsCache = all
+			m.allSessionsDirty = false
+		}
+		return m.allSessionsCache
 	}
 	if m.history.DirCursor == 1 {
 		return collectFavorites(m.history.Projects, m.history.Favorites)

internal/style/style.go

@@ -57,4 +57,18 @@ var (
 	SessionSummaryStyle = lipgloss.NewStyle().Foreground(Dim).Italic(true).Inline(true)
 	DirCountStyle       = lipgloss.NewStyle().Foreground(Accent).Inline(true)
 	ScanningStyle       = lipgloss.NewStyle().Foreground(Warning).Bold(true)
+
+	// ── 渲染热路径预构建样式 (避免每帧 NewStyle) ──
+	AccentFg        = lipgloss.NewStyle().Foreground(Accent)
+	DimFg           = lipgloss.NewStyle().Foreground(Dim)
+	SepFg           = lipgloss.NewStyle().Foreground(BgPanel)
+	SuccessBoldFg   = lipgloss.NewStyle().Foreground(Success).Bold(true)
+	WarningFg       = lipgloss.NewStyle().Foreground(Warning)
+	WarningBoldFg   = lipgloss.NewStyle().Foreground(Warning).Bold(true)
+	RedFg           = lipgloss.NewStyle().Foreground(Red)
+	CyanFg          = lipgloss.NewStyle().Foreground(Cyan)
+	AccentItalicFg  = lipgloss.NewStyle().Foreground(Accent).Italic(true)
+	AccentBoldFg    = lipgloss.NewStyle().Foreground(Accent).Bold(true)
+	TabActiveAccent = lipgloss.NewStyle().Bold(true).Background(BgPanel).Foreground(Accent)
+	TabActiveCyan   = lipgloss.NewStyle().Bold(true).Background(BgPanel).Foreground(Cyan)
 )

internal/update.go

@@ -14,7 +14,7 @@ import (
 )
 
 // Version 当前版本，发布时更新
-const Version = "0.2.0"
+const Version = "0.2.1"
 
 // --- 远程 JSON 结构 ---
 

internal/util.go

@@ -21,6 +21,20 @@ func toWinPath(s string) string {
 	return strings.ReplaceAll(s, "/", "\\")
 }
 
+// --- 分隔线缓存 ---
+
+var sepCache = make(map[int]string)
+
+// sepRunes 返回 width 个 "─" 字符，结果按 width 缓存。
+func sepRunes(w int) string {
+	if s, ok := sepCache[w]; ok {
+		return s
+	}
+	s := strings.Repeat("─", w)
+	sepCache[w] = s
+	return s
+}
+
 // --- 字符串宽度 ---
 
 func stringWidth(s string) int {

internal/view.go

@@ -28,7 +28,7 @@ func (m *Model) render() string {
 
 	b.WriteString(m.renderTabBar())
 	b.WriteString("\n")
-	b.WriteString(lipgloss.NewStyle().Foreground(style.BgPanel).Render(strings.Repeat("─", m.width)))
+	b.WriteString(style.SepFg.Render(sepRunes(m.width)))
 	b.WriteString("\n")
 
 	if m.IsHistoryTab() {
@@ -46,27 +46,27 @@ func (m *Model) render() string {
 		b.WriteString(style.InputStyle.Render(fmt.Sprintf(" ⎇ fork:%s [Enter]confirm [Esc]cancel", m.forkBuf)))
 	}
 	if m.launched != "" {
-		b.WriteString(lipgloss.NewStyle().Foreground(style.Accent).Render(fmt.Sprintf(" ✓ %s", m.launched)))
+		b.WriteString(style.AccentFg.Render(fmt.Sprintf(" ✓ %s", m.launched)))
 		m.launched = ""
 	}
 	if m.update.Done {
-		b.WriteString(lipgloss.NewStyle().Foreground(style.Success).Bold(true).
+		b.WriteString(style.SuccessBoldFg.
 			Render(fmt.Sprintf(" updated to v%s, restart to apply", m.update.NewVersion)))
 	} else if m.update.Error != nil {
-		b.WriteString(lipgloss.NewStyle().Foreground(style.Red).
+		b.WriteString(style.RedFg.
 			Render(fmt.Sprintf(" update failed: %v", m.update.Error)))
 	} else if m.update.Updating {
-		b.WriteString(lipgloss.NewStyle().Foreground(style.Warning).
+		b.WriteString(style.WarningFg.
 			Render(" updating..."))
 	} else if m.update.Available {
-		b.WriteString(lipgloss.NewStyle().Foreground(style.Warning).Bold(true).
+		b.WriteString(style.WarningBoldFg.
 			Render(fmt.Sprintf(" v%s available [u]update", m.update.NewVersion)))
 	}
 	b.WriteString("\n")
 
 	helpParts := m.renderHelp()
 	helpStr := " " + strings.Join(helpParts, "  ")
-	verStr := lipgloss.NewStyle().Foreground(style.Dim).Render("绝尘 v" + Version)
+	verStr := style.DimFg.Render("绝尘 v" + Version)
 	padW := m.width - lipgloss.Width(helpStr) - lipgloss.Width(verStr)
 	if padW > 0 {
 		b.WriteString(helpStr + strings.Repeat(" ", padW) + verStr)
@@ -88,9 +88,7 @@ func (m *Model) renderTabBar() string {
 
 	wsLabel := " 1 工作空间 "
 	if !m.IsHistoryTab() {
-		b.WriteString(lipgloss.NewStyle().
+		b.WriteString(style.TabActiveAccent.Render(wsLabel))
-			Bold(true).Background(style.BgPanel).Foreground(style.Accent).
-			Render(wsLabel))
 	} else {
 		b.WriteString(style.TabInactiveStyle.Render(wsLabel))
 	}
@@ -98,9 +96,7 @@ func (m *Model) renderTabBar() string {
 	b.WriteString(sep)
 	histLabel := " 2 历史对话 "
 	if m.IsHistoryTab() {
-		b.WriteString(lipgloss.NewStyle().
+		b.WriteString(style.TabActiveCyan.Render(histLabel))
-			Bold(true).Background(style.BgPanel).Foreground(style.Cyan).
-			Render(histLabel))
 	} else {
 		b.WriteString(style.TabInactiveStyle.Render(histLabel))
 	}
@@ -132,12 +128,12 @@ func (m *Model) renderHelp() []string {
 }
 
 func (m *Model) fmtHelp(key, desc string) string {
-	return lipgloss.NewStyle().Foreground(style.Accent).Render(key) +
+	return style.AccentFg.Render(key) +
-		lipgloss.NewStyle().Foreground(style.Dim).Render(":" + desc)
+		style.DimFg.Render(":" + desc)
 }
 
 func renderNavEntry(lines *[]string, w int, label string, activeFg string, isCur, focused bool) {
-	sep := lipgloss.NewStyle().Foreground(style.BgPanel).Render(fitWidth(" ─────────", w))
+	sep := style.SepFg.Render(fitWidth(" ─────────", w))
 	*lines = append(*lines, sep)
 	if isCur {
 		curLabel := " → " + label
@@ -150,6 +146,6 @@ func renderNavEntry(lines *[]string, w int, label string, activeFg string, isCur
 	} else {
 		inactiveLabel := "   " + label
 		line := padRightByWidth(truncateByWidth(inactiveLabel, w), w)
-		*lines = append(*lines, lipgloss.NewStyle().Foreground(style.Dim).Render(line))
+		*lines = append(*lines, style.DimFg.Render(line))
 	}
 }

internal/view_hist.go

@@ -189,10 +189,9 @@ func (m *Model) sessColumnLines(w, listH int) []string {
 func (m *Model) detailColumnLines(w, listH int) []string {
 	s := m.currentSession()
 	if s == nil {
-		return []string{lipgloss.NewStyle().Foreground(style.Dim).Render(fitWidth(" ← select to view", w))}
+		return []string{style.DimFg.Render(fitWidth(" ← select to view", w))}
 	}
 
-	sepSty := lipgloss.NewStyle().Foreground(style.BgPanel)
 	var lines []string
 
 	favPrefix := " "
@@ -200,7 +199,7 @@ func (m *Model) detailColumnLines(w, listH int) []string {
 		favPrefix = "★ "
 	}
 	lines = append(lines, style.DetailTitle.Render(fitWidth(favPrefix+s.DisplayTitle(), w)))
-	lines = append(lines, sepSty.Render(fitWidth(strings.Repeat("─", w), w)))
+	lines = append(lines, style.SepFg.Render(fitWidth(sepRunes(w), w)))
 
 	fav := "-"
 	if m.history.Favorites[s.ID] {
@@ -218,34 +217,34 @@ func (m *Model) detailColumnLines(w, listH int) []string {
 	}
 
 	if summary := s.DisplaySummary(); summary != "" {
-		lines = append(lines, sepSty.Render(fitWidth(strings.Repeat("─", w), w)))
+		lines = append(lines, style.SepFg.Render(fitWidth(sepRunes(w), w)))
 		lines = append(lines, style.SessionSummaryStyle.Render(fitWidth("  "+summary, w)))
 	}
 
 	if len(s.Completed) > 0 {
-		lines = append(lines, sepSty.Render(fitWidth(strings.Repeat("─", w), w)))
+		lines = append(lines, style.SepFg.Render(fitWidth(sepRunes(w), w)))
-		lines = append(lines, lipgloss.NewStyle().Foreground(style.Success).Bold(true).Render(fitWidth(" ✓ 已完成", w)))
+		lines = append(lines, style.SuccessBoldFg.Render(fitWidth(" ✓ 已完成", w)))
 		for _, item := range s.Completed {
 			lines = append(lines, style.NormStyle.Render(fitWidth("   · "+cleanText(item), w)))
 		}
 	}
 
 	if len(s.Pending) > 0 {
-		lines = append(lines, sepSty.Render(fitWidth(strings.Repeat("─", w), w)))
+		lines = append(lines, style.SepFg.Render(fitWidth(sepRunes(w), w)))
-		lines = append(lines, lipgloss.NewStyle().Foreground(style.Warning).Bold(true).Render(fitWidth(" ○ 待办", w)))
+		lines = append(lines, style.WarningBoldFg.Render(fitWidth(" ○ 待办", w)))
 		for _, item := range s.Pending {
 			lines = append(lines, style.NormStyle.Render(fitWidth("   · "+cleanText(item), w)))
 		}
 	}
 
-	lines = append(lines, lipgloss.NewStyle().Foreground(style.Dim).Render(fitWidth("  [Enter]resume", w)))
+	lines = append(lines, style.DimFg.Render(fitWidth("  [Enter]resume", w)))
 
 	if s.ForkFrom != "" {
 		forkID := s.ForkFrom
 		if len(forkID) > 8 {
 			forkID = forkID[:8]
 		}
-		lines = append(lines, lipgloss.NewStyle().Foreground(style.Cyan).Render(fitWidth(fmt.Sprintf("  ⎇ fork from %s", forkID), w)))
+		lines = append(lines, style.CyanFg.Render(fitWidth(fmt.Sprintf("  ⎇ fork from %s", forkID), w)))
 	}
 
 	if len(lines) > listH {

internal/view_ws.go

@@ -2,7 +2,6 @@ package internal
 
 import (
 	"fmt"
-	"strings"
 
 	"charm.land/lipgloss/v2"
 	"u-tabs/internal/style"
@@ -127,7 +126,7 @@ func (m *Model) wsListLines(g Group, svcs []Workspace, w, listH int) []string {
 			text := truncateByWidth(paddedTitle+"  "+ws.Prompt, remainW)
 			sty := style.SelStyle
 			if m.wsFocus != 1 {
-				sty = lipgloss.NewStyle().Foreground(style.Accent).Bold(true)
+				sty = style.AccentBoldFg
 			}
 			lines = append(lines, sty.Render(padRightByWidth(truncateByWidth(prefix+text, w), w)))
 		} else {
@@ -147,15 +146,14 @@ func (m *Model) wsListLines(g Group, svcs []Workspace, w, listH int) []string {
 
 func (m *Model) wsDetailLines(svcs []Workspace, w, listH int) []string {
 	if m.cursor >= len(svcs) {
-		return []string{lipgloss.NewStyle().Foreground(style.Dim).Render(fitWidth(" ← select to view", w))}
+		return []string{style.DimFg.Render(fitWidth(" ← select to view", w))}
 	}
 
 	ws := svcs[m.cursor]
-	sepSty := lipgloss.NewStyle().Foreground(style.BgPanel)
 	var lines []string
 
 	lines = append(lines, style.DetailTitle.Render(fitWidth(" "+ws.Title, w)))
-	lines = append(lines, sepSty.Render(fitWidth(strings.Repeat("─", w), w)))
+	lines = append(lines, style.SepFg.Render(fitWidth(sepRunes(w), w)))
 
 	rows := []struct {
 		key string
@@ -173,14 +171,14 @@ func (m *Model) wsDetailLines(svcs []Workspace, w, listH int) []string {
 		lines = append(lines, style.NormStyle.Render(fitWidth(line, w)))
 	}
 
-	lines = append(lines, sepSty.Render(fitWidth(strings.Repeat("─", w), w)))
+	lines = append(lines, style.SepFg.Render(fitWidth(sepRunes(w), w)))
 
 	hintCmd := "wt"
 	if !isWindows {
 		hintCmd = "bash"
 	}
-	lines = append(lines, lipgloss.NewStyle().Foreground(style.Accent).Italic(true).Render(fitWidth("  $ "+hintCmd+" → CC @"+ws.Title, w)))
+	lines = append(lines, style.AccentItalicFg.Render(fitWidth("  $ "+hintCmd+" → CC @"+ws.Title, w)))
-	lines = append(lines, lipgloss.NewStyle().Foreground(style.Dim).Render(fitWidth("  [Enter]start  [Space]multi", w)))
+	lines = append(lines, style.DimFg.Render(fitWidth("  [Enter]start  [Space]multi", w)))
 
 	if len(lines) > listH {
 		lines = lines[:listH]