Parallel Execution
Running multiple tests simultaneously across workers or machines to cut total suite runtime dramatically.
What is Parallel Execution?
What is Parallel Execution?
Parallel execution runs many tests at once—across CPU cores, workers, and machines—instead of one after another, turning a suite that would take an hour sequentially into one that finishes in minutes. It's essential for keeping large suites fast enough to run on every commit. Parallelism depends on well-isolated tests: any shared, mutable state causes cross-test interference and flakiness. Playwright parallelizes by default with isolated browser contexts, and QI Cloud scales execution across infrastructure so big suites return results quickly.