金融资源聚合平台新年特惠

// 使用懒加载技术优化页面加载速度
document.addEventListener("DOMContentLoaded", function() {
    const images = document.querySelectorAll("img.lazy");
    const observer = new IntersectionObserver((entries, observer) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                const img = entry.target;
                img.src = img.dataset.src;
                img.classList.remove("lazy");
                observer.unobserve(img);
            }
        });
    });
    images.forEach(img => {
        observer.observe(img);
    });
});

# 使用缓存减少数据库查询次数
from flask import Flask
from flask_caching import Cache

app = Flask(__name__)
cache = Cache(app, config={'CACHE_TYPE': 'simple'})

@app.route('/data')
@cache.cached(timeout=50)
def get_data():
    # 假设这是一个耗时的数据库查询操作
    data = perform_expensive_query()
    return {'data': data}