Hi pecl-dev, I’m Jeff Ching, a software engineer at Google supporting PHP tools for Google APIs and the Google Cloud Platform. My team is working on a free, open-source distributed tracing (https://cloud.google.com/trace/) tools across several languages that work in any environment (hosted or local).
This extension allows you "watch" for method and function invocation and collect latency data for the execution of the watched functions (both internal functions and user-space functions). You can consider it like a targeted xhprof - it only profiles functions that you wish to profile. I previously sent a request for this, but now the code is available at https://github.com/GoogleCloudPlatform/stackdriver-trace-php-extension. It is currently tested against the latest versions of 7.0 and 7.1, as well as against 7.2.0alpha3. Thanks, Jeff Ching
