Commit c135205

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Replace the switching function ExecEvalExpr() with a macro that jumps

directly to the appropriate per-node execution function, using a function pointer stored by ExecInitExpr. This speeds things up by eliminating one level of function call. The function-pointer technique also enables further small improvements such as only making one-time tests once (and then changing the function pointer). Overall this seems to gain about 10% on evaluation of simple expressions, which isn't earthshaking but seems a worthwhile gain for a relatively small hack. Per recent discussion on pghackers.

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src
- backend/executor
- include
  - executor
    - executor.h
    - nodeSubplan.h
  - nodes
    - execnodes.h

7 files changed

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-306

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