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How to improve the access speed of Python website through front-end optimization?

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Aug 05, 2023 am 10:21 AM

pythonAccess speedFront-end optimization

How to improve the access speed of Python website through front-end optimization?

With the development of the Internet, website access speed has become one of the important indicators of user experience. For websites developed using Python, how to improve access speed through front-end optimization is a problem that must be solved. This article will introduce some front-end optimization techniques to help improve the access speed of Python websites.

Compress and merge static files
In web pages, static files such as CSS, JavaScript and images will take up a lot of bandwidth and loading time. By compressing and merging these files, the file size can be reduced, thereby improving the loading speed of web pages. The following is a sample code that uses Flask and Flask-Assets libraries for static file compression and merging:

from flask import Flask
from flask_assets import Environment, Bundle

app = Flask(__name__)
assets = Environment(app)

css = Bundle('style1.css', 'style2.css', filters='cssmin', output='gen/packed.css')
js = Bundle('script1.js', 'script2.js', filters='jsmin', output='gen/packed.js')

assets.register('css_all', css)
assets.register('js_all', js)

@app.route('/')
def index():
    return render_template('index.html')

if __name__ == '__main__':
    app.run()

Accelerate using CDN
CDN (Content Delivery Network) is a way to convert websites A service that distributes static files to node servers around the world. By using CDN, the loading speed of static files can be greatly accelerated, thereby improving the access speed of the entire web page. The following is a sample code that uses Flask and the Flask-CDN library together with CDN to accelerate static file loading:

from flask import Flask
from flask_cdn import CDN

app = Flask(__name__)
app.config['CDN_DOMAIN'] = 'https://cdn.example.com'
cdn = CDN(app)

@app.route('/')
def index():
    return render_template('index.html')

if __name__ == '__main__':
    app.run()

Cached page
For some web pages whose content does not change frequently, you can It is cached and obtained directly from the cache the next time the user visits again, thereby reducing the time of database query and page rendering, and further improving the access speed. The following is a sample code that uses the Flask-Cache library for page caching:

from flask import Flask
from flask_caching import Cache

app = Flask(__name__)
cache = Cache(app)

@app.route('/')
@cache.cached(timeout=60)
def index():
    return render_template('index.html')

if __name__ == '__main__':
    app.run()

Using lazy loading and asynchronous loading
For some large pictures or resources in the page, you can use lazy Loading and asynchronous loading technology to optimize loading speed. Lazy loading means loading the content of an element when the user scrolls to it, while asynchronous loading means loading other resources after the page is loaded. The following is a sample code that uses the third-party Lazy Load library to implement lazy loading of images:

<!DOCTYPE html>
<html>
<head>
    <title>Lazy Load Example</title>
    <script src="jquery.min.js"></script>
    <script src="jquery.lazy.min.js"></script>
    <script>
        $(function() {
            $('.lazy').lazy();
        });
    </script>
</head>
<body>
    <img class="lazy lazy"  src="/static/imghwm/default1.png"  data-src="image.jpg"  data- alt="Image">
    <img class="lazy lazy"  src="/static/imghwm/default1.png"  data-src="image2.jpg"  data- alt="Image 2">
    ...
</body>
</html>

In summary, front-end optimization can effectively improve the access speed of Python websites. By compressing and merging static files, using CDN acceleration, caching pages, and using technologies such as lazy loading and asynchronous loading, you can reduce file size, speed up file loading, and optimize page rendering, thereby improving the user's access experience. By properly applying these optimization techniques, you can effectively improve the access speed of Python websites.

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