chore: add analysis report timing logs

app/Services/ExamAnswerAnalysisService.php

@@ -41,6 +41,15 @@ class ExamAnswerAnalysisService
      */
     public function analyzeExamAnswers(array $examData): array
     {
+        $flowStart = microtime(true);
+        $lastMark = $flowStart;
+        $timings = [];
+        $mark = static function (string $label) use (&$lastMark, &$timings): void {
+            $now = microtime(true);
+            $timings[$label] = round(($now - $lastMark) * 1000, 1);
+            $lastMark = $now;
+        };
+
         Log::info('开始分析考试答题', [
             'paper_id' => $examData['paper_id'] ?? 'unknown',
             'student_id' => $examData['student_id'] ?? 'unknown',
@@ -53,20 +62,25 @@ class ExamAnswerAnalysisService
 
         // 0. 自动计算分数并补充未提交的题目
         $questions = $this->autoCalculateScores($questions, $paperId);
+        $mark('auto_calculate_scores_ms');
 
         // 更新 examData 中的 questions（包含补充的题目）
         $examData['questions'] = $questions;
 
         // 【公司要求】1. 获取学案基准难度（取自学案的difficulty_category）
         $examBaseDifficulty = $this->getExamBaseDifficulty($examData['paper_id'] ?? '');
+        $mark('get_exam_base_difficulty_ms');
 
         // 2. 获取题目知识点映射（批量查询，避免N+1）
         $questionMappings = $this->getQuestionKnowledgeMappings($questions);
+        $mark('get_question_knowledge_mappings_ms');
 
         // 3. 保存答题记录到数据库（复用已查询的知识点映射）
         $recordChangeState = $this->saveExamAnswerRecords($examData, $questionMappings);
+        $mark('save_exam_answer_records_ms');
         // 同步回写 paper_questions 判分结果，保证 PDF 与分析链路一致
         $this->syncPaperQuestionGrading($examData);
+        $mark('sync_paper_question_grading_ms');
         $hasAnswerChanged = (bool) ($recordChangeState['steps_changed'] ?? false)
             || (bool) ($recordChangeState['questions_changed'] ?? false);
         if ($hasAnswerChanged) {
@@ -107,29 +121,45 @@ class ExamAnswerAnalysisService
                     'paper_id' => $examData['paper_id'],
                     'analysis_id' => $existing->id,
                 ]);
+                $mark('reuse_existing_analysis_ms');
+                $timings['total_ms'] = round((microtime(true) - $flowStart) * 1000, 1);
+                Log::warning('ExamAnswerAnalysisService: 答题分析耗时明细', [
+                    'paper_id' => $paperId,
+                    'student_id' => $studentId,
+                    'question_count' => count($questions),
+                    'reused_existing_analysis' => true,
+                    'timing' => $timings,
+                ]);
 
                 return $existingData;
             }
         }
+        $mark('reuse_check_ms');
 
         // 【公司要求】4. 计算每个知识点的加权掌握度（传入学案基准难度）
         // 核心算法：难度映射 → 权重计算 → 数值更新（newMastery = oldMastery + change）
         $knowledgeMasteryVector = $this->calculateKnowledgeMasteryVector($questions, $questionMappings, $examBaseDifficulty, $studentId, $paperId);
+        $mark('calculate_knowledge_mastery_vector_ms');
 
         // 【公司要求】5. 更新学生掌握度（包含多级父节点掌握度计算）
         $updatedMastery = $this->updateStudentMastery($studentId, $knowledgeMasteryVector);
+        $mark('update_student_mastery_ms');
 
         // 5. 生成题目维度分析
         $questionAnalysis = $this->analyzeQuestions($questions, $questionMappings);
+        $mark('analyze_questions_ms');
 
         // 6. 生成知识点维度分析
         $knowledgePointAnalysis = $this->analyzeKnowledgePoints($knowledgeMasteryVector, $questionMappings);
+        $mark('analyze_knowledge_points_ms');
 
         // 7. 生成整体掌握度总结
         $overallSummary = $this->generateOverallSummary($updatedMastery);
+        $mark('generate_overall_summary_ms');
 
         // 8. 生成智能出卷推荐依据
         $smartQuizRecommendation = $this->generateSmartQuizRecommendation($updatedMastery);
+        $mark('generate_smart_quiz_recommendation_ms');
 
         // 9. 保存分析结果
         $analysisResult = [
@@ -146,6 +176,7 @@ class ExamAnswerAnalysisService
         // 【新增】创建掌握度快照，并返回 current_mastery（仅kp->mastery）
         $snapshotInfo = $this->createMasterySnapshot($studentId, $paperId, $analysisResult);
         $analysisResult['current_mastery'] = $snapshotInfo['current_mastery'] ?? [];
+        $mark('create_mastery_snapshot_ms');
 
         $this->saveAnalysisResult(
             $studentId,
@@ -153,12 +184,23 @@ class ExamAnswerAnalysisService
             $analysisResult,
             $hasAnswerChanged ? $questions : []
         );
+        $mark('save_analysis_result_ms');
 
         Log::info('考试答题分析完成', [
             'student_id' => $studentId,
             'paper_id' => $examData['paper_id'],
             'analyzed_knowledge_points' => count($knowledgeMasteryVector),
         ]);
+        $timings['total_ms'] = round((microtime(true) - $flowStart) * 1000, 1);
+        Log::warning('ExamAnswerAnalysisService: 答题分析耗时明细', [
+            'paper_id' => $paperId,
+            'student_id' => $studentId,
+            'question_count' => count($questions),
+            'submitted_question_count' => count($examData['questions'] ?? []),
+            'knowledge_point_count' => count($knowledgeMasteryVector),
+            'has_answer_changed' => $hasAnswerChanged,
+            'timing' => $timings,
+        ]);
 
         return $analysisResult;
     }

app/Services/ExamPdfExportService.php

@@ -433,7 +433,7 @@ class ExamPdfExportService
             $mark('save_pdf_url_ms');
             $marks['total_ms'] = round((microtime(true) - $flowStart) * 1000, 1);
 
-            Log::info('ExamPdfExportService: 学情分析PDF耗时明细', [
+            Log::warning('ExamPdfExportService: 学情分析PDF耗时明细', [
                 'paper_id' => $paperId,
                 'student_id' => $studentId,
                 'record_id' => $recordId,