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frank.meulblok
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> One thread doesn't know what the other is doing, so each will do its job > compile the file and write out the r-code. Well, that's where the risk is, as that's where timing issues can happen: If both threads try to compile the same file at the same time, they try to write to same .r file at the same time. That risk can be mitigated by giving each thread it's own temporary build location and merging those together into a final location. That way you trade in file contention worries for temporarily having duplicate files, and all you really need to make sure of is that you have eough free disk space for those duplicate files.
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