Our test suite is growing, and we need to run large-scale parallel Selenium tests without hitting performance issues. Which grids can handle hundreds of parallel runs efficiently?
We hit this exact scaling wall when our regression suite crossed a few hundred tests. What worked for us was moving to LambdaTest and gradually increasing concurrency. Once configured properly, it handled 100+ parallel Selenium runs without choking. The key difference was that sessions didn’t queue endlessly like they did on our old setup.
From personal experience, large-scale runs only work if the grid can allocate resources dynamically. LambdaTest does a good job here. We split our test suite into logical batches and ran them in parallel pipelines. Execution time dropped drastically, and the grid stayed stable even under heavy load.
One lesson we learned the hard way: don’t just max out concurrency blindly. On LambdaTest, we found a sweet spot by balancing parallel threads with browser/device selection. Once we tuned that, large-scale runs became reliable and repeatable instead of flaky and unpredictable.