v3.5.7 - Optimize StackTrace capture

[gmpassos]

v3.5.7

• PgSessionBase:

  • Optimize _prepare by passing the already captured StackTrace to _sendAndWaitForQuery.

• Added ResultStreamTrace:

  • A ResultStream that adds a callerTrace parameter to the listen method.

• _BoundStatement now implements ResultStreamTrace rather than ResultStream.

• _PgResultStreamSubscription: added an optional callerTrace parameter to its constructors.

• PreparedStatement:

  • Optimized run and _closePendingPortals by reducing StackTrace captures.

[gmpassos]

@isoos

With this PR, the StackTrace bottleneck was reduced to about 1%:

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Detailed:

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Previous (postgres v3.5.6):

[gmpassos]

Note, this PR is just reducing unnecessary calls to StackTrace.current