@bschauer/webtools-mcp-server/src/tools/performance/analysis/index.js

MCP server providing web analysis tools including screenshot, debug, performance, security, accessibility, SEO, and asset optimization capabilities

/**
 * Performance analysis modules for trace data
 * Analyzes Chrome DevTools Protocol trace data for performance bottlenecks
 */

import { logInfo, logError } from "../../../utils/logging.js";

/**
 * Analyze trace data for performance bottlenecks
 * @param {Object} traceData - Chrome DevTools Protocol trace data
 * @param {Object} options - Analysis options
 * @param {boolean} options.analyzeLayoutThrashing - Whether to analyze layout thrashing patterns
 * @param {boolean} options.analyzeCssVariables - Whether to analyze CSS variables impact
 * @param {boolean} options.analyzeJsExecution - Whether to analyze JavaScript execution
 * @param {boolean} options.analyzeLongTasks - Whether to analyze long tasks
 * @param {boolean} options.analyzeMemoryAndDom - Whether to analyze memory and DOM
 * @param {boolean} options.analyzeResourceLoading - Whether to analyze resource loading
 * @param {number} options.longTaskThresholdMs - Threshold for long tasks in milliseconds
 * @param {number} options.layoutThrashingThreshold - Threshold for layout thrashing
 * @param {number} options.memoryLeakThresholdKb - Threshold for memory leaks in KB
 * @param {string} options.detailLevel - Level of detail in the analysis
 * @param {boolean} options.includeRecommendations - Whether to include recommendations
 * @param {string} options.focusSelector - CSS selector to focus the analysis on
 * @param {string} options.focusTimeRangeMs - Time range to focus the analysis on
 * @returns {Array} Array of bottlenecks with descriptions and recommendations
 */
export function analyzeTraceData(traceData, options = {}) {
  const {
    analyzeLayoutThrashing = true,
    analyzeCssVariables = true,
    analyzeJsExecution = true,
    analyzeLongTasks = true,
    analyzeMemoryAndDom = true,
    analyzeResourceLoading = true,
    longTaskThresholdMs = 50,
    layoutThrashingThreshold = 10,
    memoryLeakThresholdKb = 10,
    detailLevel = "detailed",
    includeRecommendations = true,
    focusSelector,
    focusTimeRangeMs,
  } = options;

  logInfo("performance_analysis", "Starting trace data analysis", { options });

  const bottlenecks = [];

  try {
    // Placeholder for actual analysis modules
    // In a real implementation, we would import and call the analysis modules here

    // Example bottleneck detection
    bottlenecks.push({
      type: "analysis_placeholder",
      description: "Performance analysis modules are being implemented",
      details: "This is a placeholder for the actual analysis modules",
      recommendation: "Check back soon for the full implementation",
    });

    // Add information about the analysis options
    bottlenecks.push({
      type: "analysis_options",
      description: "Analysis options",
      details: JSON.stringify(options, null, 2),
    });

    logInfo("performance_analysis", "Trace data analysis completed", {
      bottlenecksFound: bottlenecks.length,
    });

    return bottlenecks;
  } catch (error) {
    logError("performance_analysis", "Error analyzing trace data", error);

    return [
      {
        type: "analysis_error",
        description: "Error analyzing trace data",
        details: error.message,
        stack: error.stack,
      },
    ];
  }
}