In the field of web crawlers and data scraping, the application of proxy IP is crucial. The proxy IP can help the crawler program bypass the anti-crawler mechanism of the target website and obtain the required data efficiently. Among them, residential proxy IP is favored by the majority of crawler developers for its high authenticity and concealment.

Among residential proxy, dynamic residential proxy and static residential proxy are two common types. This article will explore in detail the difference between dynamic residential proxies and static residential proxies, and guide developers on how to choose the appropriate proxy method to crawl data more easily.

1. Basic concepts of dynamic residential proxy and static residential proxy

Dynamic residential proxy refers to a residential proxy service whose proxy IP address changes dynamically over time. Every time the crawler makes a request, the dynamic residential proxy assigns it a new residential IP address. 

This dynamic change feature makes it more difficult for the crawler program to be recognized by the target website, thereby improving the crawling success rate.

Static residential proxy refers to a residential proxy service where the proxy IP address remains fixed. The crawler will use the same residential IP address for access over a period of time. Because the IP address of a static residential proxy is fixed, it is more stable and predictable.

2. The difference between dynamic residential proxy and static residential proxy

IP address variability

The IP address of a dynamic residential proxy changes dynamically, and a new IP is assigned with each request. This variability makes it more difficult to identify and block bots when they visit a target website.

The IP address of a static residential proxy is fixed. Although it is more stable and predictable, it may be identified and blocked by the target website due to using the same IP for a long time.

Access speed and stability

Since the dynamic residential proxy assigns a new IP address with every request, this may cause some latency and instability. Especially when the request volume is large, the process of dynamically allocating IP may add additional overhead. In contrast, static residential proxies usually have higher access speed and stability due to their use of fixed IP addresses.

Anti-crawler response capabilities

The dynamic changing characteristics of the IP address of dynamic residential proxies make it more difficult to be identified by the anti-crawler mechanism of the target website. Even if an IP address is identified and blocked, Dynamic Residential Proxy can quickly assign a new IP address to the crawler to continue access.

Although the static residential proxy can also bypass the anti-crawler mechanism to a certain extent, once its IP address is identified and blocked, it needs to be manually replaced with a new IP address, which is more troublesome.

cost and price

Dynamic residential proxies are generally more expensive than static residential proxies. This is because dynamic residential proxy need to maintain a large number of residential IP address libraries and allocate new IP addresses to crawlers in real time, which requires high technical and operational costs. Static residential proxy, on the other hand, are relatively simple and low-cost.

3. How to choose the appropriate proxy method

When choosing between a dynamic residential proxy and a static residential proxy, developers need to make a trade-off based on their own needs and actual circumstances. Here are some suggestions:

Consider the anti-crawler mechanism of the target website

If the anti-crawler mechanism of the target website is strict, it is recommended to use a dynamic residential proxy. The dynamic change characteristics of the IP address of the dynamic residential proxy can better cope with the anti-crawler mechanism and improve the crawling success rate.

Consider the volume and frequency of bot visits

If the crawler needs to access large amounts of data or frequently access the target website, it is recommended to use a static residential proxy. Static residential proxy are more stable and predictable, ensuring the stable operation of the crawler program.

Consider costs and budget

Dynamic residential proxies are generally more expensive, while static residential proxies are relatively cheap. Developers need to choose based on their budget and actual needs. If the budget is limited, you can consider using a static residential proxy; if you are pursuing higher crawling efficiency and success rate, you can consider using a dynamic residential proxy.

4. Things to note when using residential proxy

Whether using dynamic residential proxies or static residential proxies, developers need to pay attention to the following:

Comply with laws, regulations and website regulations

When using residential proxies for crawling work, you must comply with relevant laws, regulations and website regulations. Do not engage in illegal activities such as malicious crawling or infringing on other people's privacy.

Change proxy IP regularly

In order to reduce the risk of being identified and blocked by the target website, it is recommended to regularly change the residential proxy IP used. This can be achieved by purchasing multiple proxy IPs or using a proxy service that automatically changes IPs.

Reasonably set crawler access frequency

Reasonable access frequency is crucial to keep the crawler running stably and avoid putting too much pressure on the target website. Developers should set appropriate access frequency and strategies based on the anti-crawler mechanism of the target website and their own needs.

5. Conclusion

Dynamic residential proxy and static residential proxy each have their own advantages and disadvantages. Which proxy method to choose depends on the developer's specific needs and actual situation. 

By understanding the difference between the two and following usage considerations, developers can more easily choose the appropriate proxy method to crawl data more efficiently.

In the development and application of crawler technology, residential proxy will continue to play an important role in helping developers cope with various challenges and achieve data capture goals.