much better.

.gitignore

@@ -1,2 +1,3 @@
 /output/
 /bin/
+/web/output/

main.cpp

@@ -8,6 +8,8 @@
 
 // Function to convert hex color string to Vec4
 Vec4 hexToVec4(const std::string& hex) {
+    TIME_FUNCTION;
+    
     if (hex.length() != 6) {
         return Vec4(0, 0, 0, 1); // Default to black if invalid
     }
@@ -20,7 +22,8 @@ Vec4 hexToVec4(const std::string& hex) {
 
 // Generate gradient image
 bool generateGradientImage(const std::string& filename, int width = 512, int height = 512) {
-    #TIME_FUNCTION;
+    TIME_FUNCTION;
+    
     const int POINTS_PER_DIM = 256;
     
     Grid2 grid;
@@ -67,6 +70,39 @@ bool generateGradientImage(const std::string& filename, int width = 512, int hei
     return JXLWriter::saveJXL(filename, imageData, width, height);
 }
 
+// Add this function to get timing stats as JSON
+std::string getTimingStatsJSON() {
+    
+    auto stats = FunctionTimer::getStats();
+    std::stringstream json;
+    
+    json << "[";
+    bool first = true;
+    
+    for (const auto& [func_name, data] : stats) {
+        if (!first) json << ",";
+        first = false;
+        
+        auto percentiles = FunctionTimer::calculatePercentiles(data.timings);
+        
+        json << "{"
+             << "\"function\":\"" << func_name << "\","
+             << "\"call_count\":" << data.call_count << ","
+             << "\"total_time\":" << std::fixed << std::setprecision(6) << data.total_time << ","
+             << "\"avg_time\":" << std::fixed << std::setprecision(6) << data.avg_time() << ","
+             << "\"min_time\":" << std::fixed << std::setprecision(6) << percentiles.min << ","
+             << "\"max_time\":" << std::fixed << std::setprecision(6) << percentiles.max << ","
+             << "\"median_time\":" << std::fixed << std::setprecision(6) << percentiles.median << ","
+             << "\"p90_time\":" << std::fixed << std::setprecision(6) << percentiles.p90 << ","
+             << "\"p95_time\":" << std::fixed << std::setprecision(6) << percentiles.p95 << ","
+             << "\"p99_time\":" << std::fixed << std::setprecision(6) << percentiles.p99
+             << "}";
+    }
+    
+    json << "]";
+    return json.str();
+}
+
 int main(int argc, char* argv[]) {
     // Check command line arguments
     int port = 8080;
@@ -94,7 +130,7 @@ int main(int argc, char* argv[]) {
     
     // Generate gradient image before starting server
     std::cout << "Generating gradient image..." << std::endl;
-    if (generateGradientImage(webRoot + "/gradient.jxl")) {
+    if (generateGradientImage(webRoot + "/output/gradient.jxl")) {
         std::cout << "Gradient image generated successfully" << std::endl;
     } else {
         std::cerr << "Failed to generate gradient image" << std::endl;
@@ -103,6 +139,23 @@ int main(int argc, char* argv[]) {
     
     SimpleHTTPServer server(port, webRoot);
     
+    // Add timing stats endpoint
+    server.addRoute("/api/timing-stats", [](const std::string& method, const std::string& body) {
+        if (method == "GET") {
+            return std::make_pair(200, getTimingStatsJSON());
+        }
+        //return std::make_pair(405, "{\"error\":\"Method Not Allowed\"}");
+    });
+    
+    // Add clear stats endpoint
+    server.addRoute("/api/clear-stats", [](const std::string& method, const std::string& body) {
+        if (method == "POST") {
+            FunctionTimer::clearStats();
+            return std::make_pair(200, "{\"status\":\"success\"}");
+        }
+        return std::make_pair(405, "{\"error\":\"Method Not Allowed\"}");
+    });
+    
     if (!server.start()) {
         std::cerr << "Failed to start server on port " << port << std::endl;
         return 1;
@@ -110,6 +163,7 @@ int main(int argc, char* argv[]) {
     
     std::cout << "Server running on http://localhost:" << port << std::endl;
     std::cout << "Web root: " << webRoot << std::endl;
+    std::cout << "Timing stats available at /api/timing-stats" << std::endl;
     std::cout << "Press Ctrl+C to stop the server" << std::endl;
     
     server.handleRequests();

util/jxlwriter.hpp

@@ -8,9 +8,8 @@
 #include <algorithm>
 #include <filesystem>
 #include "vec3.hpp"
-// #include "../jxl/encode.h"
+#include "timing_decorator.hpp"
 #include <jxl/encode.h>
-// #include "../jxl/thread_parallel_runner.h"
 #include <jxl/thread_parallel_runner.h>
 
 class JXLWriter {
@@ -64,10 +63,8 @@ private:
 public:
     // Save a 2D vector of Vec3 (RGB) colors as JXL
     // Vec3 components: x = red, y = green, z = blue (values in range [0,1])
-    static bool saveJXL(const std::string& filename, 
+    static bool saveJXL(const std::string& filename, const std::vector<std::vector<Vec3>>& pixels,
-                       const std::vector<std::vector<Vec3>>& pixels,
+                       float quality = 90.0f, int effort = 7) {
-                       float quality = 90.0f,  // Quality setting (0-100)
-                       int effort = 7) {       // Encoding effort (3-9, higher = slower but better compression)
         if (pixels.empty() || pixels[0].empty()) {
             return false;
         }
@@ -85,12 +82,8 @@ public:
         return saveJXL(filename, pixels, width, height, quality, effort);
     }
     
-    // Alternative interface with width/height and flat vector (row-major order)
+    static bool saveJXL(const std::string& filename, const std::vector<Vec3>& pixels, 
-    static bool saveJXL(const std::string& filename, 
+                       int width, int height, float quality = 90.0f, int effort = 7) {
-                       const std::vector<Vec3>& pixels, 
-                       int width, int height,
-                       float quality = 90.0f,
-                       int effort = 7) {
         if (pixels.size() != width * height) {
             return false;
         }
@@ -107,11 +100,9 @@ public:
     }
     
     // Save from 1D vector of uint8_t pixels (RGB order: pixels[i]=r, pixels[i+1]=g, pixels[i+2]=b)
-    static bool saveJXL(const std::string& filename, 
+    static bool saveJXL(const std::string& filename, const std::vector<uint8_t>& pixels, 
-                       const std::vector<uint8_t>& pixels, 
+                       int width, int height, float quality = 90.0f, int effort = 7) {
-                       int width, int height,
+        TIME_FUNCTION;
-                       float quality = 90.0f,
-                       int effort = 7) {
         if (pixels.size() != width * height * 3) {
             return false;
         }
@@ -223,20 +214,14 @@ public:
     }
     
 private:
-    static bool saveJXL(const std::string& filename, 
+    static bool saveJXL(const std::string& filename, const std::vector<std::vector<Vec3>>& pixels, 
-                       const std::vector<std::vector<Vec3>>& pixels, 
+                       int width, int height, float quality, int effort) {
-                       int width, int height,
-                       float quality,
-                       int effort) {
-        // Create directory if needed
         if (!createDirectoryIfNeeded(filename)) {
             return false;
         }
         
-        // Convert Vec3 pixels to interleaved RGB
         std::vector<uint8_t> rgbData = convertToRGB(pixels, width, height);
         
-        // Use the existing uint8_t version
         return saveJXL(filename, rgbData, width, height, quality, effort);
     }
 };

util/simple_httpserver.hpp

@@ -9,6 +9,9 @@
 #include <cstring>
 #include <sstream>
 #include <fstream>
+#include <functional>
+#include <unordered_map>
+#include "timing_decorator.hpp"
 
 #ifdef _WIN32
     #include <winsock2.h>
@@ -28,6 +31,10 @@ private:
     bool running;
     std::string webRoot;
     
+    // Route handler type
+    using RouteHandler = std::function<std::pair<int, std::string>(const std::string&, const std::string&)>;
+    std::unordered_map<std::string, RouteHandler> routes;
+    
     // Read file content
     std::string readFile(const std::string& filename) {
         std::ifstream file(filename, std::ios::binary);
@@ -55,14 +62,17 @@ private:
     
     // Send HTTP response
     void sendResponse(int clientSocket, const std::string& content, const std::string& contentType = "text/html", int statusCode = 200) {
+        TIME_FUNCTION;
         std::string statusText = "OK";
         if (statusCode == 404) statusText = "Not Found";
         if (statusCode == 500) statusText = "Internal Server Error";
+        if (statusCode == 405) statusText = "Method Not Allowed";
         
         std::ostringstream response;
         response << "HTTP/1.1 " << statusCode << " " << statusText << "\r\n";
         response << "Content-Type: " << contentType << "\r\n";
         response << "Content-Length: " << content.length() << "\r\n";
+        response << "Access-Control-Allow-Origin: *\r\n";
         response << "Connection: close\r\n";
         response << "\r\n";
         response << content;
@@ -71,18 +81,23 @@ private:
         send(clientSocket, responseStr.c_str(), responseStr.length(), 0);
     }
     
+    // Extract method and path from HTTP request
+    std::pair<std::string, std::string> parseRequest(const std::string& request) {
+        TIME_FUNCTION;
+        std::istringstream iss(request);
+        std::string method, path;
+        iss >> method >> path;
+        return {method, path};
+    }
+    
     // Extract file path from HTTP request
     std::string getFilePath(const std::string& request) {
-        // Find the start of the path after "GET "
+        auto [method, path] = parseRequest(request);
-        size_t start = request.find("GET ") + 4;
-        if (start == std::string::npos) return "";
         
-        // Find the end of the path (space or ?)
+        // Only handle GET requests for files
-        size_t end = request.find(" ", start);
+        if (method != "GET") {
-        if (end == std::string::npos) end = request.find("?", start);
+            return "";
-        if (end == std::string::npos) return "";
+        }
-        
-        std::string path = request.substr(start, end - start);
         
         // Default to index.html for root path
         if (path == "/") {
@@ -97,6 +112,31 @@ private:
         return path;
     }
     
+    // Check if path is a registered route
+    bool isRoute(const std::string& path) {
+        return routes.find(path) != routes.end();
+    }
+    
+    // Handle route request
+    void handleRoute(int clientSocket, const std::string& request) {
+        TIME_FUNCTION;
+        auto [method, path] = parseRequest(request);
+        
+        // Extract request body if present
+        std::string body;
+        size_t bodyPos = request.find("\r\n\r\n");
+        if (bodyPos != std::string::npos) {
+            body = request.substr(bodyPos + 4);
+        }
+        
+        if (routes.find(path) != routes.end()) {
+            auto [statusCode, response] = routes[path](method, body);
+            sendResponse(clientSocket, response, "application/json", statusCode);
+        } else {
+            sendResponse(clientSocket, "404 Not Found", "text/plain", 404);
+        }
+    }
+
 public:
     SimpleHTTPServer(int port = 8080, const std::string& webRoot = "web") 
         : port(port), serverSocket(-1), running(false), webRoot(webRoot) {}
@@ -105,6 +145,11 @@ public:
         stop();
     }
     
+    // Add a route handler
+    void addRoute(const std::string& path, RouteHandler handler) {
+        routes[path] = handler;
+    }
+    
     bool start() {
 #ifdef _WIN32
         WSADATA wsaData;
@@ -186,21 +231,29 @@ public:
             
             if (bytesReceived > 0) {
                 std::string request(buffer);
-                std::string filePath = getFilePath(request);
+                auto [method, path] = parseRequest(request);
                 
-                if (!filePath.empty()) {
+                // Check if this is a registered route
-                    std::cout << "Serving: " << filePath << std::endl;
+                if (isRoute(path)) {
-                    
+                    handleRoute(clientSocket, request);
-                    std::string fullPath = webRoot + "/" + filePath;
-                    std::string content = readFile(fullPath);
-                    
-                    if (!content.empty()) {
-                        sendResponse(clientSocket, content, getContentType(filePath));
-                    } else {
-                        sendResponse(clientSocket, "404 Not Found: " + filePath, "text/plain", 404);
-                    }
                 } else {
-                    sendResponse(clientSocket, "400 Bad Request", "text/plain", 400);
+                    // Handle file serving for GET requests
+                    std::string filePath = getFilePath(request);
+                    
+                    if (!filePath.empty()) {
+                        std::cout << "Serving: " << filePath << std::endl;
+                        
+                        std::string fullPath = webRoot + "/" + filePath;
+                        std::string content = readFile(fullPath);
+                        
+                        if (!content.empty()) {
+                            sendResponse(clientSocket, content, getContentType(filePath));
+                        } else {
+                            sendResponse(clientSocket, "404 Not Found: " + filePath, "text/plain", 404);
+                        }
+                    } else {
+                        sendResponse(clientSocket, "400 Bad Request", "text/plain", 400);
+                    }
                 }
             }
             

util/timing_decorator.hpp

@@ -47,10 +47,10 @@ public:
     // Clear all statistics
     static void clearStats();
 
+    static PercentileStats calculatePercentiles(const std::vector<double>& timings);
 private:
     static std::unordered_map<std::string, TimingStats> stats_;
     
-    static PercentileStats calculatePercentiles(const std::vector<double>& timings);
 };
 
 // Macro to easily time functions - similar to Python decorator

web/index.html

@@ -11,12 +11,26 @@
         <div class="controls">
             <button onclick="refreshImage()">Refresh Image</button>
             <button onclick="toggleAutoRefresh()" id="autoRefreshBtn">Start Auto-Refresh (30s)</button>
+            <button onclick="showStats()" id="statsBtn">Show Performance Stats</button>
+            <button onclick="clearStats()" id="clearStatsBtn">Clear Stats</button>
         </div>
         
         <div class="image-container">
-            <img id="gradientImage" src="gradient.jxl" alt="Dynamic Gradient">
+            <img id="gradientImage" src="/output/gradient.jxl" alt="Dynamic Gradient">
         </div>
         
+        <div id="statsPanel" class="stats-panel" style="display: none;">
+            <div class="stats-header">
+                <h3>Performance Statistics</h3>
+                <button onclick="hideStats()" class="close-btn">&times;</button>
+            </div>
+            <div id="statsContent" class="stats-content">
+                <!-- Stats will be loaded here -->
+            </div>
+        </div>
+        
+        <div id="status" class="status"></div>
+    </div>
 
     <script src="script.js"></script>
 </body>

web/script.js

@@ -18,7 +18,6 @@ function refreshImage() {
     };
 }
 
-
 function toggleAutoRefresh() {
     const button = document.getElementById('autoRefreshBtn');
     
@@ -36,6 +35,77 @@ function toggleAutoRefresh() {
     }
 }
 
+function showStats() {
+    fetch('/api/timing-stats')
+        .then(response => response.json())
+        .then(data => {
+            displayStats(data);
+            document.getElementById('statsPanel').style.display = 'block';
+        })
+        .catch(error => {
+            console.error('Error fetching stats:', error);
+            updateStatus('Error loading stats', 'error');
+        });
+}
+
+function hideStats() {
+    document.getElementById('statsPanel').style.display = 'none';
+}
+
+function clearStats() {
+    fetch('/api/clear-stats', { method: 'POST' })
+        .then(response => response.json())
+        .then(data => {
+            updateStatus('Statistics cleared');
+            hideStats();
+        })
+        .catch(error => {
+            console.error('Error clearing stats:', error);
+            updateStatus('Error clearing stats', 'error');
+        });
+}
+
+function displayStats(stats) {
+    const statsContent = document.getElementById('statsContent');
+    
+    if (stats.length === 0) {
+        statsContent.innerHTML = '<p>No timing data available.</p>';
+        return;
+    }
+    
+    let html = '<table class="stats-table">';
+    html += '<tr><th>Function</th><th>Calls</th><th>Total (s)</th><th>Avg (s)</th><th>Min (s)</th><th>Max (s)</th><th>Median (s)</th><th>P90 (s)</th><th>P95 (s)</th><th>P99 (s)</th></tr>';
+    
+    stats.forEach(stat => {
+        html += `<tr>
+            <td>${stat.function}</td>
+            <td>${stat.call_count}</td>
+            <td>${parseFloat(stat.total_time).toFixed(6)}</td>
+            <td>${parseFloat(stat.avg_time).toFixed(6)}</td>
+            <td>${parseFloat(stat.min_time).toFixed(6)}</td>
+            <td>${parseFloat(stat.max_time).toFixed(6)}</td>
+            <td>${parseFloat(stat.median_time).toFixed(6)}</td>
+            <td>${parseFloat(stat.p90_time).toFixed(6)}</td>
+            <td>${parseFloat(stat.p95_time).toFixed(6)}</td>
+            <td>${parseFloat(stat.p99_time).toFixed(6)}</td>
+        </tr>`;
+    });
+    
+    html += '</table>';
+    statsContent.innerHTML = html;
+}
+
+function updateStatus(message, type = 'info') {
+    const statusEl = document.getElementById('status');
+    statusEl.textContent = message;
+    statusEl.className = `status ${type}`;
+    
+    // Auto-hide after 5 seconds
+    setTimeout(() => {
+        statusEl.textContent = '';
+        statusEl.className = 'status';
+    }, 5000);
+}
 
 // Auto-refresh when page loads
 document.addEventListener('DOMContentLoaded', function() {