Debugging

Ruby apps can use *lots* of memory. But why? Various people in the community attribute it to memory fragmentation, and provide "hacky" solutions. Dissatisfied by the current explanations and provided solutions, Hongli Lai set out on a journey to discover the deeper truth and to find better solutions

Doesn't crash on my machine - when debugging Passenger turns into debugging Docker through pair programming.

Selenium + Chrome Headless fail with mysterious errors when run in GitLab CI and Docker. Here's why, and also how we fixed it.

During performance testing of the Rails 5.0.0 release we discovered two bugs in Rails. One data corruption bug that occurs when two threads transmit on the same channel, and another bug causing socket leaks that could ev

Passenger is compatible with Node.js debugging tools such as the builtin Node.js debugger and node-inspector. The builtin Node.js debugger is a simple terminal-based debugger that accepts terminal commands, while node-in