captcha-canvas/dist/metrics.js

A captcha generator by using skia-canvas module.

"use strict";
/**
 * Performance monitoring utilities
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.MetricsCollector = void 0;
class MetricsCollector {
    constructor() {
        this.metrics = [];
        this.enabled = false;
    }
    static getInstance() {
        if (!MetricsCollector.instance) {
            MetricsCollector.instance = new MetricsCollector();
        }
        return MetricsCollector.instance;
    }
    enable() {
        this.enabled = true;
    }
    disable() {
        this.enabled = false;
    }
    startGeneration() {
        if (!this.enabled)
            return 0;
        return performance.now();
    }
    endGeneration(startTime, dimensions, features) {
        if (!this.enabled || startTime === 0)
            return null;
        const endTime = performance.now();
        const metrics = {
            startTime,
            endTime,
            duration: endTime - startTime,
            memoryUsage: process.memoryUsage(),
            dimensions,
            features,
        };
        this.metrics.push(metrics);
        // Keep only last 100 metrics to prevent memory leaks
        if (this.metrics.length > 100) {
            this.metrics = this.metrics.slice(-100);
        }
        return metrics;
    }
    getAverageGenerationTime() {
        if (this.metrics.length === 0)
            return 0;
        const total = this.metrics.reduce((sum, m) => sum + m.duration, 0);
        return total / this.metrics.length;
    }
    getMetrics() {
        return [...this.metrics];
    }
    clearMetrics() {
        this.metrics = [];
    }
}
exports.MetricsCollector = MetricsCollector;