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`Struct.new` create a new class and define new methods, which isn't something you want to happen at runtime as it flushes some VM caches, and can generate an unbounded amount of methods, which may be compiled by the JIT. Since these Struct hold configuration data, we can define a simpler class that rely on `method_missing`. Attribute access are very sligthly slower, but negligible for a network API client, and much more friendly to the Ruby VM.
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Struct.newcreate a new class and define new methods, which isn't something you want to happen at runtime as it flushes some VM caches, and can generate an unbounded amount of methods, which may be compiled by the JIT.Since these Struct hold configuration data, we can define a simpler class that rely on
method_missing. Attribute access are very slightly slower, but negligible for a network API client, and much more friendly to the Ruby VM.In our app,
aws-sdkis by far the top source of runtime class creation: