[Litarnus]

Introduces pausing and resuming a manual profiling session. For long living runtimes such as FrankenPHP or Swoole, there might be a time where the runtime simply waits for a next request to handle. By design, the process doesn't terminate which means that Excimer is still running and producing samples. This will then look like the last call took a very long time.

By calling pause and resume at request boundaries, we are able to inject idle samples which will signal a stop to the previous sampled call. Internally it's solved through a request reference counting, so even if the runtimes is async, it will only pause if no other request is currently in-flight.

[cursor]

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