Playwright-soak package detects repeating memory leaks in SPAs during CI runs

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A new open-source package called playwright-soak extends Playwright test suites to automatically detect memory leaks in single-page applications. The tool repeats a user-defined interaction flow hundreds of times with forced garbage collection between cycles, then analyzes the shape of memory growth rather than just the final delta. This approach distinguishes genuine repeating leaks — such as store subscribers or DOM nodes that accumulate on every interaction — from one-time allocations like caches or transient browser activity. Traditional unit tests, end-to-end suites, and Lighthouse audits miss these leaks because they each run a flow only once or on a fresh page load. By integrating leak detection into CI pipelines, the tool aims to catch memory regressions on every pull request before they reach production.

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