Hey Joel–awesome service and post. Your tip about parallelizing via browser instances instead of tabs resonated with me as I've had a lot of headaches with one bad request taking down a full instance. That said, it does seem like the constant launch/close of puppeteer browser instances does have some sort of memory leak – Here's what happened when I switched from parallelizing via pages to browsers: https://imgur.com/a/rCz3oow

Have you seen any similar behavior in your system? I initially thought I was forgetting to close the browser instance but triple checked my code and it does seem like I'm calling close() everywhere.