I’ve been working with Selenium for web automation and tried PhantomJS for headless browsing. While PhantomJS works fine for basic tasks, it consumes too much RAM when I need to run many instances at once.
My requirements:
Support for JavaScript, AJAX, and HTML5
Proxy configuration capabilities
Low memory footprint for running 100+ concurrent instances
Compatible with Windows environment
Nice to have features:
.NET bindings available
Portable without installation requirements
Well-documented API
WebKit engine
I’m considering HTMLUnit and ZombieJS as potential options. Has anyone built similar multi-threaded scraping applications? What headless browser solution worked best for high-concurrency scenarios?
I experienced similar issues with PhantomJS when scaling my projects. Switching to headless Chrome significantly improved memory management. By utilizing flags like --max_old_space_size, I was able to control memory usage effectively. The JS support in headless Chrome is far more reliable, and there are .NET integrations available through ChromeDriver, making it a solid choice for .NET applications. Proxy configurations are straightforward using ChromeOptions. Just ensure proper disposal of drivers to avoid memory leaks. I’ve successfully managed over 80 instances on a 16GB setup with no performance hiccups. HTMLUnit has its merits, but its JavaScript compatibility with modern websites can be inconsistent.
i gave ZombieJS a shot too, but man, it was a letdown. had a ton of issues with new sites. switched to headless firefox, and wow, it handles memory so much better than PhantomJS. multi-instance runs are way smoother, plus js support is pretty reliable.
Puppeteer Sharp is a reliable alternative for your needs. It’s a .NET port of Google’s Puppeteer that operates using headless Chrome, which naturally has a lower memory footprint than PhantomJS, especially if you disable unnecessary resources like images and CSS. In my experience, I’ve managed to run over 120 concurrent instances on a capable server without any issues. Proxy support is robust, and the setup is straightforward using launch options. Additionally, it benefits from being regularly updated in line with Chrome, ensuring good JavaScript compatibility. The documentation is solid and there’s an active community for support. It also has minimal dependencies and performs better with modern web applications compared to HTMLUnit. Just ensure you implement proper connection pooling and timeout management for optimal stability at high concurrency.