perf: 错误处理性能优化

- MatchRule 延迟/限制 body ToLower，先用 statusCode 短路，只在需要关键词匹配时转换且限制 8KB
- 预计算规则的小写关键词/平台和 error code set，消除运行时重复 ToLower 和线性扫描
- MODEL_CAPACITY_EXHAUSTED 全局去重，避免并发请求重复重试同一模型
- 503 重试 body 读取限制从 2MB 降至 8KB
- time.After 替换为 time.NewTimer，防止 context 取消时 timer 泄漏

backend/internal/service/antigravity_gateway_service.go

@@ -16,6 +16,7 @@ import (
 	"os"
 	"strconv"
 	"strings"
+	"sync"
 	"sync/atomic"
 	"time"
 
@@ -66,6 +67,9 @@ const (
 	// 单账号 503 退避重试：原地重试的总累计等待时间上限
 	// 超过此上限将不再重试，直接返回 503
 	antigravitySingleAccountSmartRetryTotalMaxWait = 30 * time.Second
+
+	// MODEL_CAPACITY_EXHAUSTED 全局去重：重试全部失败后的 cooldown 时间
+	antigravityModelCapacityCooldown = 10 * time.Second
 )
 
 // antigravityPassthroughErrorMessages 透传给客户端的错误消息白名单（小写）
@@ -74,6 +78,12 @@ var antigravityPassthroughErrorMessages = []string{
 	"prompt is too long",
 }
 
+// MODEL_CAPACITY_EXHAUSTED 全局去重：避免多个并发请求同时对同一模型进行容量耗尽重试
+var (
+	modelCapacityExhaustedMu    sync.RWMutex
+	modelCapacityExhaustedUntil = make(map[string]time.Time) // modelName -> cooldown until
+)
+
 const (
 	antigravityBillingModelEnv    = "GATEWAY_ANTIGRAVITY_BILL_WITH_MAPPED_MODEL"
 	antigravityFallbackSecondsEnv = "GATEWAY_ANTIGRAVITY_FALLBACK_COOLDOWN_SECONDS"
@@ -211,17 +221,38 @@ func (s *AntigravityGatewayService) handleSmartRetry(p antigravityRetryLoopParam
 		if isModelCapacityExhausted {
 			maxAttempts = antigravityModelCapacityRetryMaxAttempts
 			waitDuration = antigravityModelCapacityRetryWait
+
+			// 全局去重：如果其他 goroutine 已在重试同一模型且尚在 cooldown 中，直接返回 503
+			if modelName != "" {
+				modelCapacityExhaustedMu.RLock()
+				cooldownUntil, exists := modelCapacityExhaustedUntil[modelName]
+				modelCapacityExhaustedMu.RUnlock()
+				if exists && time.Now().Before(cooldownUntil) {
+					log.Printf("%s status=%d model_capacity_exhausted_dedup model=%s account=%d cooldown_until=%v (skip retry)",
+						p.prefix, resp.StatusCode, modelName, p.account.ID, cooldownUntil.Format("15:04:05"))
+					return &smartRetryResult{
+						action: smartRetryActionBreakWithResp,
+						resp: &http.Response{
+							StatusCode: resp.StatusCode,
+							Header:     resp.Header.Clone(),
+							Body:       io.NopCloser(bytes.NewReader(respBody)),
+						},
+					}
+				}
+			}
 		}
 
 		for attempt := 1; attempt <= maxAttempts; attempt++ {
 			log.Printf("%s status=%d oauth_smart_retry attempt=%d/%d delay=%v model=%s account=%d",
 				p.prefix, resp.StatusCode, attempt, maxAttempts, waitDuration, modelName, p.account.ID)
 
+			timer := time.NewTimer(waitDuration)
 			select {
 			case <-p.ctx.Done():
+				timer.Stop()
 				log.Printf("%s status=context_canceled_during_smart_retry", p.prefix)
 				return &smartRetryResult{action: smartRetryActionBreakWithResp, err: p.ctx.Err()}
-			case <-time.After(waitDuration):
+			case <-timer.C:
 			}
 
 			// 智能重试：创建新请求
@@ -242,6 +273,12 @@ func (s *AntigravityGatewayService) handleSmartRetry(p antigravityRetryLoopParam
 			retryResp, retryErr := p.httpUpstream.Do(retryReq, p.proxyURL, p.account.ID, p.account.Concurrency)
 			if retryErr == nil && retryResp != nil && retryResp.StatusCode != http.StatusTooManyRequests && retryResp.StatusCode != http.StatusServiceUnavailable {
 				log.Printf("%s status=%d smart_retry_success attempt=%d/%d", p.prefix, retryResp.StatusCode, attempt, maxAttempts)
+				// 重试成功，清除 MODEL_CAPACITY_EXHAUSTED cooldown
+				if isModelCapacityExhausted && modelName != "" {
+					modelCapacityExhaustedMu.Lock()
+					delete(modelCapacityExhaustedUntil, modelName)
+					modelCapacityExhaustedMu.Unlock()
+				}
 				return &smartRetryResult{action: smartRetryActionBreakWithResp, resp: retryResp}
 			}
 
@@ -257,7 +294,7 @@ func (s *AntigravityGatewayService) handleSmartRetry(p antigravityRetryLoopParam
 			}
 			lastRetryResp = retryResp
 			if retryResp != nil {
-				lastRetryBody, _ = io.ReadAll(io.LimitReader(retryResp.Body, 2<<20))
+				lastRetryBody, _ = io.ReadAll(io.LimitReader(retryResp.Body, 8<<10))
 				_ = retryResp.Body.Close()
 			}
 
@@ -283,6 +320,12 @@ func (s *AntigravityGatewayService) handleSmartRetry(p antigravityRetryLoopParam
 		// MODEL_CAPACITY_EXHAUSTED：模型容量不足，切换账号无意义
 		// 直接返回上游错误响应，不设置模型限流，不切换账号
 		if isModelCapacityExhausted {
+			// 设置 cooldown，让后续请求快速失败，避免重复重试
+			if modelName != "" {
+				modelCapacityExhaustedMu.Lock()
+				modelCapacityExhaustedUntil[modelName] = time.Now().Add(antigravityModelCapacityCooldown)
+				modelCapacityExhaustedMu.Unlock()
+			}
 			log.Printf("%s status=%d smart_retry_exhausted_model_capacity attempts=%d model=%s account=%d body=%s (model capacity exhausted, not switching account)",
 				p.prefix, resp.StatusCode, maxAttempts, modelName, p.account.ID, truncateForLog(retryBody, 200))
 			return &smartRetryResult{
@@ -395,11 +438,13 @@ func (s *AntigravityGatewayService) handleSingleAccountRetryInPlace(
 		log.Printf("%s status=%d single_account_503_retry attempt=%d/%d delay=%v total_waited=%v model=%s account=%d",
 			p.prefix, resp.StatusCode, attempt, antigravitySingleAccountSmartRetryMaxAttempts, waitDuration, totalWaited, modelName, p.account.ID)
 
+		timer := time.NewTimer(waitDuration)
 		select {
 		case <-p.ctx.Done():
+			timer.Stop()
 			log.Printf("%s status=context_canceled_during_single_account_retry", p.prefix)
 			return &smartRetryResult{action: smartRetryActionBreakWithResp, err: p.ctx.Err()}
-		case <-time.After(waitDuration):
+		case <-timer.C:
 		}
 		totalWaited += waitDuration
 
@@ -433,7 +478,7 @@ func (s *AntigravityGatewayService) handleSingleAccountRetryInPlace(
 			_ = lastRetryResp.Body.Close()
 		}
 		lastRetryResp = retryResp
-		lastRetryBody, _ = io.ReadAll(io.LimitReader(retryResp.Body, 2<<20))
+		lastRetryBody, _ = io.ReadAll(io.LimitReader(retryResp.Body, 8<<10))
 		_ = retryResp.Body.Close()
 
 		// 解析新的重试信息，更新下次等待时间
@@ -1404,7 +1449,7 @@ func (s *AntigravityGatewayService) Forward(ctx context.Context, c *gin.Context,
 					break
 				}
 
-				retryBody, _ := io.ReadAll(io.LimitReader(retryResp.Body, 2<<20))
+				retryBody, _ := io.ReadAll(io.LimitReader(retryResp.Body, 8<<10))
 				_ = retryResp.Body.Close()
 				if retryResp.StatusCode == http.StatusTooManyRequests {
 					retryBaseURL := ""
@@ -2211,10 +2256,12 @@ func sleepAntigravityBackoffWithContext(ctx context.Context, attempt int) bool {
 		sleepFor = 0
 	}
 
+	timer := time.NewTimer(sleepFor)
 	select {
 	case <-ctx.Done():
+		timer.Stop()
 		return false
-	case <-time.After(sleepFor):
+	case <-timer.C:
 		return true
 	}
 }

backend/internal/service/error_passthrough_service.go

@@ -45,10 +45,20 @@ type ErrorPassthroughService struct {
 	cache ErrorPassthroughCache
 
 	// 本地内存缓存，用于快速匹配
-	localCache   []*model.ErrorPassthroughRule
+	localCache   []*cachedPassthroughRule
 	localCacheMu sync.RWMutex
 }
 
+// cachedPassthroughRule 预计算的规则缓存，避免运行时重复 ToLower
+type cachedPassthroughRule struct {
+	*model.ErrorPassthroughRule
+	lowerKeywords  []string         // 预计算的小写关键词
+	lowerPlatforms []string         // 预计算的小写平台
+	errorCodeSet   map[int]struct{} // 预计算的 error code set
+}
+
+const maxBodyMatchLen = 8 << 10 // 8KB，错误信息不会在 8KB 之后才出现
+
 // NewErrorPassthroughService 创建错误透传规则服务
 func NewErrorPassthroughService(
 	repo ErrorPassthroughRepository,
@@ -150,17 +160,19 @@ func (s *ErrorPassthroughService) MatchRule(platform string, statusCode int, bod
 		return nil
 	}
 
-	bodyStr := strings.ToLower(string(body))
+	lowerPlatform := strings.ToLower(platform)
+	var bodyLower string     // 延迟初始化，只在需要关键词匹配时计算
+	var bodyLowerDone bool
 
 	for _, rule := range rules {
 		if !rule.Enabled {
 			continue
 		}
-		if !s.platformMatches(rule, platform) {
+		if !s.platformMatchesCached(rule, lowerPlatform) {
 			continue
 		}
-		if s.ruleMatches(rule, statusCode, bodyStr) {
+		if s.ruleMatchesOptimized(rule, statusCode, body, &bodyLower, &bodyLowerDone) {
-			return rule
+			return rule.ErrorPassthroughRule
 		}
 	}
 
@@ -168,7 +180,7 @@ func (s *ErrorPassthroughService) MatchRule(platform string, statusCode int, bod
 }
 
 // getCachedRules 获取缓存的规则列表（按优先级排序）
-func (s *ErrorPassthroughService) getCachedRules() []*model.ErrorPassthroughRule {
+func (s *ErrorPassthroughService) getCachedRules() []*cachedPassthroughRule {
 	s.localCacheMu.RLock()
 	rules := s.localCache
 	s.localCacheMu.RUnlock()
@@ -223,17 +235,39 @@ func (s *ErrorPassthroughService) reloadRulesFromDB(ctx context.Context) error {
 	return nil
 }
 
-// setLocalCache 设置本地缓存
+// setLocalCache 设置本地缓存，预计算小写值和 set 以避免运行时重复计算
 func (s *ErrorPassthroughService) setLocalCache(rules []*model.ErrorPassthroughRule) {
+	cached := make([]*cachedPassthroughRule, len(rules))
+	for i, r := range rules {
+		cr := &cachedPassthroughRule{ErrorPassthroughRule: r}
+		if len(r.Keywords) > 0 {
+			cr.lowerKeywords = make([]string, len(r.Keywords))
+			for j, kw := range r.Keywords {
+				cr.lowerKeywords[j] = strings.ToLower(kw)
+			}
+		}
+		if len(r.Platforms) > 0 {
+			cr.lowerPlatforms = make([]string, len(r.Platforms))
+			for j, p := range r.Platforms {
+				cr.lowerPlatforms[j] = strings.ToLower(p)
+			}
+		}
+		if len(r.ErrorCodes) > 0 {
+			cr.errorCodeSet = make(map[int]struct{}, len(r.ErrorCodes))
+			for _, code := range r.ErrorCodes {
+				cr.errorCodeSet[code] = struct{}{}
+			}
+		}
+		cached[i] = cr
+	}
+
 	// 按优先级排序
-	sorted := make([]*model.ErrorPassthroughRule, len(rules))
+	sort.Slice(cached, func(i, j int) bool {
-	copy(sorted, rules)
+		return cached[i].Priority < cached[j].Priority
-	sort.Slice(sorted, func(i, j int) bool {
-		return sorted[i].Priority < sorted[j].Priority
 	})
 
 	s.localCacheMu.Lock()
-	s.localCache = sorted
+	s.localCache = cached
 	s.localCacheMu.Unlock()
 }
 
@@ -273,62 +307,79 @@ func (s *ErrorPassthroughService) invalidateAndNotify(ctx context.Context) {
 	}
 }
 
-// platformMatches 检查平台是否匹配
+// ensureBodyLower 延迟初始化 body 的小写版本，只做一次转换，限制 8KB
-func (s *ErrorPassthroughService) platformMatches(rule *model.ErrorPassthroughRule, platform string) bool {
+func ensureBodyLower(body []byte, bodyLower *string, done *bool) string {
-	// 如果没有配置平台限制，则匹配所有平台
+	if *done {
-	if len(rule.Platforms) == 0 {
+		return *bodyLower
+	}
+	b := body
+	if len(b) > maxBodyMatchLen {
+		b = b[:maxBodyMatchLen]
+	}
+	*bodyLower = strings.ToLower(string(b))
+	*done = true
+	return *bodyLower
+}
+
+// platformMatchesCached 使用预计算的小写平台检查是否匹配
+func (s *ErrorPassthroughService) platformMatchesCached(rule *cachedPassthroughRule, lowerPlatform string) bool {
+	if len(rule.lowerPlatforms) == 0 {
 		return true
 	}
-
+	for _, p := range rule.lowerPlatforms {
-	platform = strings.ToLower(platform)
+		if p == lowerPlatform {
-	for _, p := range rule.Platforms {
-		if strings.ToLower(p) == platform {
 			return true
 		}
 	}
-
 	return false
 }
 
-// ruleMatches 检查规则是否匹配
+// ruleMatchesOptimized 优化的规则匹配，支持短路和延迟 body 转换
-func (s *ErrorPassthroughService) ruleMatches(rule *model.ErrorPassthroughRule, statusCode int, bodyLower string) bool {
+func (s *ErrorPassthroughService) ruleMatchesOptimized(rule *cachedPassthroughRule, statusCode int, body []byte, bodyLower *string, bodyLowerDone *bool) bool {
-	hasErrorCodes := len(rule.ErrorCodes) > 0
+	hasErrorCodes := len(rule.errorCodeSet) > 0
-	hasKeywords := len(rule.Keywords) > 0
+	hasKeywords := len(rule.lowerKeywords) > 0
 
-	// 如果没有配置任何条件，不匹配
 	if !hasErrorCodes && !hasKeywords {
 		return false
 	}
 
-	codeMatch := !hasErrorCodes || s.containsInt(rule.ErrorCodes, statusCode)
+	codeMatch := !hasErrorCodes || s.containsIntSet(rule.errorCodeSet, statusCode)
-	keywordMatch := !hasKeywords || s.containsAnyKeyword(bodyLower, rule.Keywords)
 
 	if rule.MatchMode == model.MatchModeAll {
-		// "all" 模式：所有配置的条件都必须满足
+		// "all" 模式：所有配置的条件都必须满足，短路
-		return codeMatch && keywordMatch
+		if hasErrorCodes && !codeMatch {
+			return false
+		}
+		if hasKeywords {
+			return s.containsAnyKeywordCached(ensureBodyLower(body, bodyLower, bodyLowerDone), rule.lowerKeywords)
+		}
+		return codeMatch
 	}
 
-	// "any" 模式：任一条件满足即可
+	// "any" 模式：任一条件满足即可，短路
 	if hasErrorCodes && hasKeywords {
-		return codeMatch || keywordMatch
+		if codeMatch {
+			return true
+		}
+		return s.containsAnyKeywordCached(ensureBodyLower(body, bodyLower, bodyLowerDone), rule.lowerKeywords)
 	}
-	return codeMatch && keywordMatch
+	// 只配置了一种条件
+	if hasKeywords {
+		return s.containsAnyKeywordCached(ensureBodyLower(body, bodyLower, bodyLowerDone), rule.lowerKeywords)
+	}
+	return codeMatch
 }
 
-// containsInt 检查切片是否包含指定整数
+// containsIntSet 使用 map 查找替代线性扫描
-func (s *ErrorPassthroughService) containsInt(slice []int, val int) bool {
+func (s *ErrorPassthroughService) containsIntSet(set map[int]struct{}, val int) bool {
-	for _, v := range slice {
+	_, ok := set[val]
-		if v == val {
+	return ok
-			return true
+}
-		}
+
-	}
+// containsAnyKeywordCached 使用预计算的小写关键词检查匹配
-	return false
+func (s *ErrorPassthroughService) containsAnyKeywordCached(bodyLower string, lowerKeywords []string) bool {
-}
+	for _, kw := range lowerKeywords {
-
+		if strings.Contains(bodyLower, kw) {
-// containsAnyKeyword 检查字符串是否包含任一关键词（不区分大小写）
-func (s *ErrorPassthroughService) containsAnyKeyword(bodyLower string, keywords []string) bool {
-	for _, kw := range keywords {
-		if strings.Contains(bodyLower, strings.ToLower(kw)) {
 			return true
 		}
 	}

backend/internal/service/error_passthrough_service_test.go

@@ -145,32 +145,58 @@ func newTestService(rules []*model.ErrorPassthroughRule) *ErrorPassthroughServic
 	return svc
 }
 
+// newCachedRuleForTest 从 model.ErrorPassthroughRule 创建 cachedPassthroughRule（测试用）
+func newCachedRuleForTest(rule *model.ErrorPassthroughRule) *cachedPassthroughRule {
+	cr := &cachedPassthroughRule{ErrorPassthroughRule: rule}
+	if len(rule.Keywords) > 0 {
+		cr.lowerKeywords = make([]string, len(rule.Keywords))
+		for j, kw := range rule.Keywords {
+			cr.lowerKeywords[j] = strings.ToLower(kw)
+		}
+	}
+	if len(rule.Platforms) > 0 {
+		cr.lowerPlatforms = make([]string, len(rule.Platforms))
+		for j, p := range rule.Platforms {
+			cr.lowerPlatforms[j] = strings.ToLower(p)
+		}
+	}
+	if len(rule.ErrorCodes) > 0 {
+		cr.errorCodeSet = make(map[int]struct{}, len(rule.ErrorCodes))
+		for _, code := range rule.ErrorCodes {
+			cr.errorCodeSet[code] = struct{}{}
+		}
+	}
+	return cr
+}
+
 // =============================================================================
-// 测试 ruleMatches 核心匹配逻辑
+// 测试 ruleMatchesOptimized 核心匹配逻辑
 // =============================================================================
 
 func TestRuleMatches_NoConditions(t *testing.T) {
 	// 没有配置任何条件时，不应该匹配
 	svc := newTestService(nil)
-	rule := &model.ErrorPassthroughRule{
+	rule := newCachedRuleForTest(&model.ErrorPassthroughRule{
 		Enabled:    true,
 		ErrorCodes: []int{},
 		Keywords:   []string{},
 		MatchMode:  model.MatchModeAny,
-	}
+	})
 
-	assert.False(t, svc.ruleMatches(rule, 422, "some error message"),
+	var bodyLower string
+	var bodyLowerDone bool
+	assert.False(t, svc.ruleMatchesOptimized(rule, 422, []byte("some error message"), &bodyLower, &bodyLowerDone),
 		"没有配置条件时不应该匹配")
 }
 
 func TestRuleMatches_OnlyErrorCodes_AnyMode(t *testing.T) {
 	svc := newTestService(nil)
-	rule := &model.ErrorPassthroughRule{
+	rule := newCachedRuleForTest(&model.ErrorPassthroughRule{
 		Enabled:    true,
 		ErrorCodes: []int{422, 400},
 		Keywords:   []string{},
 		MatchMode:  model.MatchModeAny,
-	}
+	})
 
 	tests := []struct {
 		name       string
@@ -186,7 +212,9 @@ func TestRuleMatches_OnlyErrorCodes_AnyMode(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			result := svc.ruleMatches(rule, tt.statusCode, tt.body)
+			var bodyLower string
+			var bodyLowerDone bool
+			result := svc.ruleMatchesOptimized(rule, tt.statusCode, []byte(tt.body), &bodyLower, &bodyLowerDone)
 			assert.Equal(t, tt.expected, result)
 		})
 	}
@@ -194,12 +222,12 @@ func TestRuleMatches_OnlyErrorCodes_AnyMode(t *testing.T) {
 
 func TestRuleMatches_OnlyKeywords_AnyMode(t *testing.T) {
 	svc := newTestService(nil)
-	rule := &model.ErrorPassthroughRule{
+	rule := newCachedRuleForTest(&model.ErrorPassthroughRule{
 		Enabled:    true,
 		ErrorCodes: []int{},
 		Keywords:   []string{"context limit", "model not supported"},
 		MatchMode:  model.MatchModeAny,
-	}
+	})
 
 	tests := []struct {
 		name       string
@@ -210,16 +238,14 @@ func TestRuleMatches_OnlyKeywords_AnyMode(t *testing.T) {
 		{"关键词匹配 context limit", 500, "error: context limit reached", true},
 		{"关键词匹配 model not supported", 400, "the model not supported here", true},
 		{"关键词不匹配", 422, "some other error", false},
-		// 注意：ruleMatches 接收的 body 参数应该是已经转换为小写的
+		{"关键词大小写 - 自动转换", 500, "Context Limit exceeded", true},
-		// 实际使用时，MatchRule 会先将 body 转换为小写再传给 ruleMatches
-		{"关键词大小写 - 输入已小写", 500, "context limit exceeded", true},
 	}
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			// 模拟 MatchRule 的行为：先转换为小写
+			var bodyLower string
-			bodyLower := strings.ToLower(tt.body)
+			var bodyLowerDone bool
-			result := svc.ruleMatches(rule, tt.statusCode, bodyLower)
+			result := svc.ruleMatchesOptimized(rule, tt.statusCode, []byte(tt.body), &bodyLower, &bodyLowerDone)
 			assert.Equal(t, tt.expected, result)
 		})
 	}
@@ -228,12 +254,12 @@ func TestRuleMatches_OnlyKeywords_AnyMode(t *testing.T) {
 func TestRuleMatches_BothConditions_AnyMode(t *testing.T) {
 	// any 模式：错误码 OR 关键词
 	svc := newTestService(nil)
-	rule := &model.ErrorPassthroughRule{
+	rule := newCachedRuleForTest(&model.ErrorPassthroughRule{
 		Enabled:    true,
 		ErrorCodes: []int{422, 400},
 		Keywords:   []string{"context limit"},
 		MatchMode:  model.MatchModeAny,
-	}
+	})
 
 	tests := []struct {
 		name       string
@@ -274,7 +300,9 @@ func TestRuleMatches_BothConditions_AnyMode(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			result := svc.ruleMatches(rule, tt.statusCode, tt.body)
+			var bodyLower string
+			var bodyLowerDone bool
+			result := svc.ruleMatchesOptimized(rule, tt.statusCode, []byte(tt.body), &bodyLower, &bodyLowerDone)
 			assert.Equal(t, tt.expected, result, tt.reason)
 		})
 	}
@@ -283,12 +311,12 @@ func TestRuleMatches_BothConditions_AnyMode(t *testing.T) {
 func TestRuleMatches_BothConditions_AllMode(t *testing.T) {
 	// all 模式：错误码 AND 关键词
 	svc := newTestService(nil)
-	rule := &model.ErrorPassthroughRule{
+	rule := newCachedRuleForTest(&model.ErrorPassthroughRule{
 		Enabled:    true,
 		ErrorCodes: []int{422, 400},
 		Keywords:   []string{"context limit"},
 		MatchMode:  model.MatchModeAll,
-	}
+	})
 
 	tests := []struct {
 		name       string
@@ -329,14 +357,16 @@ func TestRuleMatches_BothConditions_AllMode(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			result := svc.ruleMatches(rule, tt.statusCode, tt.body)
+			var bodyLower string
+			var bodyLowerDone bool
+			result := svc.ruleMatchesOptimized(rule, tt.statusCode, []byte(tt.body), &bodyLower, &bodyLowerDone)
 			assert.Equal(t, tt.expected, result, tt.reason)
 		})
 	}
 }
 
 // =============================================================================
-// 测试 platformMatches 平台匹配逻辑
+// 测试 platformMatchesCached 平台匹配逻辑
 // =============================================================================
 
 func TestPlatformMatches(t *testing.T) {
@@ -394,10 +424,10 @@ func TestPlatformMatches(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			rule := &model.ErrorPassthroughRule{
+			rule := newCachedRuleForTest(&model.ErrorPassthroughRule{
 				Platforms: tt.rulePlatforms,
-			}
+			})
-			result := svc.platformMatches(rule, tt.requestPlatform)
+			result := svc.platformMatchesCached(rule, strings.ToLower(tt.requestPlatform))
 			assert.Equal(t, tt.expected, result)
 		})
 	}