Re: [PATCH v17 0/9] MR10515: vbscript: Bind local variables, class properties, and loop variables at compile time.

[Jacek Caban (＠jacek)]

> When a For-Each loop iterates over a SAFEARRAY, bypass the IEnumVARIANT COM vtable dispatch and copy  lements directly from the array data. This eliminates the COM call overhead and one intermediate VariantCopy per iteration.

It is a bit surprising that COM call overhead is noticeable. Indirect calls are not free, but we use them for each opcode anyway, so I would expect the savings to be lost in the noise.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/10515#note_136525