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 connor (burnt/out) (UTC-8) | Caveat to my question: I’m not as familiar as I’d like to be with this aspect of interpreters or implementations of languages, so apologies if it doesn’t make sense.
From my understanding of how lists and attribute sets are implemented, they are not persistent data structures (I remember seeing a lot of memory allocations followed by calls to memcpy). Is that correct?
If it is, is it possible persistent data structures could improve evaluation performance by allowing reuse? Or is it already known it would not, either due to other properties of the implementation (like GC behavior).
To be clear, I’m not implying that this should be a goal for the team — it’s more of a question in general about interpreted functional languages with a GC. | 16:59:01 |
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 Mic92 | connor (he/him) (UTC-7): that's also a hunch that I have. But I never tested/measured if it is true. I also found this library: https://sinusoid.es/immer/ which does even support boemgc (just like nix) | 09:01:05 |
| Mic92 | It shouldn't be too complicated to try it out for attrsets I think | 09:01:28 |
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| connor (burnt/out) (UTC-8) | I decided to start with lists hoping it’d be a smaller change
I have to say I don’t understand the rules governing lifetime of values
I also think the way Values are constructed (pointers and mutation) makes it difficult to use immer in an idiomatic way (at least, as far as I can infer from the docs)
At any rate, most of the tests pass so I’ll upload the work in progress hopefully today | 09:01:13 |
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 tazjin |
I have to say I don’t understand the rules governing lifetime of values
the rule is "YOLO"
| 12:11:38 |
