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PublicExternal.md

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Public vs External

External calls are expensive, therefore, fewer external calls == fewer gas cost.

Also, consider appropriate function visibility. Internal functions are cheaper to call than public functions. Therefore, there is no need to mark a function as public if it is only meant to be called internally.

Preview

Testing on the PublicExternal.t.sol file,

    Running 2 tests for test/PublicExternal.t.sol:PublicExternalTest
    [PASS] testReturnExternal() (gas: 5433)
    [PASS] testReturnPublic() (gas: 5378)
    Test result: ok. 2 passed; 0 failed; finished in 420.30µs

Guidelines

External calls are expensive.