Putting code in the .orElse that has a side effect that can affect performance #4199
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jlerbsc
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When using Optionals, whatever code is provided in the .orElse will be executed everytime the Optional is evaluated. Sometimes people make the mistake of putting code in the .orElse that has a side effect that can affect performance or can result in bugs. In these cases .orElseGet should be used as it defers execution until the Optional actually evaluates to empty and the .orElseGet needs to be run.