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docs: add sway memory model #6775

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docs: add sway memory model #6775

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docs: add sway memory model
matt-user Dec 5, 2024
d72c720
chore: fix lint
matt-user Dec 5, 2024
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fix: spellcheck:
matt-user Dec 5, 2024
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Update docs/book/src/reference/rust_differences.md
matt-user Dec 6, 2024
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Merge branch 'master' into matt-user/memory-differences-docs
matt-user Dec 7, 2024
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Update docs/book/src/reference/rust_differences.md
matt-user Dec 7, 2024
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6 changes: 5 additions & 1 deletion docs/book/spell-check-custom-words.txt
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Expand Up @@ -227,4 +227,8 @@ predicate-root
forc-client
crypto
doc
fmt
fmt
deallocated
deallocate
destructors
destructor
6 changes: 6 additions & 0 deletions docs/book/src/reference/rust_differences.md
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Expand Up @@ -34,3 +34,9 @@ struct MyStruct {
field_two: bool,
}
```

## Memory Allocation

In Rust, the borrow checker implements Rust's [ownership system](https://doc.rust-lang.org/1.8.0/book/ownership.html)

In Sway, there is no borrow checker. This means there is no concept of ownership, borrowing, or lifetimes. Instead, objects are copied and moved similar to C++. Also Sway does not have any destructors nor `Drop` traits. This means allocated memory lives for the entire transaction and is not deallocated until the end of the transaction. A transaction can contain 65 MB of memory.
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Do we have a source for the 65 MB number and can that be linked to the spec documentation if that's where it's from? Since that may change in the future.

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cc @FuelLabs/client

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