object GlobalExecutionContext extends WartTraverser
The global execution context scala.concurrent.ExecutionContext.global should be avoided because it is integrated with neither of the following: - Canton's error reporting - execution context supervision - thread count configuration - the workarounds for the bugs in the ForkJoinPool Moreover, if it is used in tests, the tests may interfere in unexpected ways.
For unit tests, mix in the traits com.daml.resources.HasExecutionContext or com.digitalasset.canton.HasExecutorService,
which provide a suitably configured scala.concurrent.ExecutionContext.
For integration tests, an execution context should already be in scope.
In production code, properly pass the right scala.concurrent.ExecutionContext into where it is needed.
Create a new one using com.digitalasset.canton.concurrent.Threading if absolutely necessary.
For similar reasons, the scala.concurrent.ExecutionContext.parasitic should not be used.
Use com.digitalasset.canton.concurrent.DirectExecutionContext instead.
scala.concurrent.ExecutionContext.opportunistic should be avoided as well, but given that scala.concurrent.ExecutionContext.opportunistic is private to the scala package, this wart does not check for it.
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