feat(提升性能): 继续优化性能

go.mod

@@ -5,7 +5,7 @@ go 1.25.0
 require (
 	github.com/tdewolff/canvas v0.0.0-20260708151538-b3beae08c578
 	github.com/tdewolff/font v0.0.0-20260527091451-1663e68cb8a4
-	github.com/xiaoqidun/jbig2 v0.0.0-20260710074125-96fddd152f49
+	github.com/xiaoqidun/jbig2 v0.0.0-20260714021516-ffe617d6fbc8
 	golang.org/x/image v0.44.0
 	golang.org/x/text v0.40.0
 )

go.sum

@@ -73,8 +73,8 @@ github.com/tdewolff/test v1.0.12 h1:7F21DqIajswxuche0geHdrUZRCWE4oko4b7bcmkkrxk=
 github.com/tdewolff/test v1.0.12/go.mod h1:XPuWBzvdUzhCuxWO1ojpXsyzsA5bFoS3tO/Q3kFuTG8=
 github.com/wcharczuk/go-chart/v2 v2.1.2 h1:Y17/oYNuXwZg6TFag06qe8sBajwwsuvPiJJXcUcLL6E=
 github.com/wcharczuk/go-chart/v2 v2.1.2/go.mod h1:Zi4hbaqlWpYajnXB2K22IUYVXRXaLfSGNNR7P4ukyyQ=
-github.com/xiaoqidun/jbig2 v0.0.0-20260710074125-96fddd152f49 h1:h/1lOG9/75eK4atpQFcm9oGXmxekMVfsPJowtYLXu5w=
+github.com/xiaoqidun/jbig2 v0.0.0-20260714021516-ffe617d6fbc8 h1:HSruvQiN+t72xcn4VQyvB4GRCyX0dnu3+6k4DFnmPvM=
-github.com/xiaoqidun/jbig2 v0.0.0-20260710074125-96fddd152f49/go.mod h1:4ieZvd1EYR3zUzaAT4H8vLDb6XO+yjnxuh33So/5iC4=
+github.com/xiaoqidun/jbig2 v0.0.0-20260714021516-ffe617d6fbc8/go.mod h1:4ieZvd1EYR3zUzaAT4H8vLDb6XO+yjnxuh33So/5iC4=
 github.com/xyproto/randomstring v1.0.5 h1:YtlWPoRdgMu3NZtP45drfy1GKoojuR7hmRcnhZqKjWU=
 github.com/xyproto/randomstring v1.0.5/go.mod h1:rgmS5DeNXLivK7YprL0pY+lTuhNQW3iGxZ18UQApw/E=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=

ofdgo.go

@@ -73,6 +73,7 @@ func NewRenderer(reader *Reader, opts ...RendererOption) *Renderer {
 		FontMap:               make(map[string]*canvas.FontFamily),
 		fontFSCache:           make(map[fontFSKey]*canvas.FontFamily),
 		textGlyphPathCache:    make(map[textGlyphPathCacheKey]textGlyphPathCacheValue),
+		templatePageCache:     make(map[string]*PageContent),
 	}
 	for _, opt := range opts {
 		opt(r)

ofdgo_font_info.go

@@ -291,6 +291,7 @@ func (r *Renderer) fontUsage(doc *Document, pages []*PageContent) map[string]int
 	for _, tpl := range doc.CommonData.TemplatePage {
 		page, err := r.Reader.PageContent(Page{BaseLoc: tpl.BaseLoc})
 		if err == nil {
+			r.templatePageCache[tpl.ID] = page
 			r.countPageFonts(page, usage)
 		}
 	}

ofdgo_renderer.go

@@ -35,6 +35,7 @@ type Renderer struct {
 	FontCIDMap            map[string]map[uint16]rune
 	fontFSCache           map[fontFSKey]*canvas.FontFamily
 	textGlyphPathCache    map[textGlyphPathCacheKey]textGlyphPathCacheValue
+	templatePageCache     map[string]*PageContent
 	fontDirs              []string
 	fontFS                []fs.FS
 }

ofdgo_renderer_layer.go

@@ -38,19 +38,24 @@ func (r *Renderer) renderAnnotations(ctx *canvas.Context, pageID string, pageH f
 // renderTemplate 渲染模板
 // 入参: ctx 画布上下文, templateID 模板ID, pageH 页面高度
 func (r *Renderer) renderTemplate(ctx *canvas.Context, templateID string, pageH float64) {
-	var tplPage *TemplatePage
+	tplContent := r.templatePageCache[templateID]
-	for _, tp := range r.Reader.doc.CommonData.TemplatePage {
+	if tplContent == nil {
-		if tp.ID == templateID {
+		var tplPage *TemplatePage
-			tplPage = &tp
+		for i := range r.Reader.doc.CommonData.TemplatePage {
-			break
+			if r.Reader.doc.CommonData.TemplatePage[i].ID == templateID {
+				tplPage = &r.Reader.doc.CommonData.TemplatePage[i]
+				break
+			}
 		}
-	}
+		if tplPage == nil {
-	if tplPage == nil {
+			return
-		return
+		}
-	}
+		var err error
-	tplContent, err := r.Reader.PageContent(Page{BaseLoc: tplPage.BaseLoc})
+		tplContent, err = r.Reader.PageContent(Page{BaseLoc: tplPage.BaseLoc})
-	if err != nil {
+		if err != nil {
-		return
+			return
+		}
+		r.templatePageCache[templateID] = tplContent
 	}
 	if tplContent.Content.Layer != nil {
 		for _, layer := range tplContent.Content.Layer {