Commits on Apr 6, 2021

1. Stop checking for Process.pid and trust the fork decorators …

   `Process.pid` is not cached on Linux and is surprisingly
   expensive. These checks are in hotspots, the the cost is not
   negligible.
   
   In rails#37296 (comment)
   we established that it's pretty much impossible to bypass
   `Process.fork` / `Kernel#fork`.
   
   We still added the checks to protect against user defined
   `after_fork` hooks that would use the connection. But
   I don't think the cost is worth this extra safety.

   

   byroot committed Apr 6, 2021
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