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refactor(tvix/eval): Box Value::String

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NixString is *quite* large - like 80 bytes - because of the extra
capacity value for BString and because of the context. We want to keep
Value small since we're passing it around a lot, so let's box the
NixString inside Value::String to save on some memory, and make cloning
ostensibly a little cheaper

Change-Id: I343c8b4e7f61dc3dcbbaba4382efb3b3e5bbabb2
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10729
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
This commit is contained in:
Aspen Smith 2024-02-01 12:28:29 -05:00 • committed by aspen
parent 4c5d9fa356
commit 5f0f4ea374
15 changed files with 69 additions and 72 deletions
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4
tvix/glue/src/tvix_store_io.rs
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@ -356,7 +356,7 @@ mod tests {
let value = result.value.expect("must be some");
match value {
tvix_eval::Value::String(s) => Some((**s).clone().into_string_lossy()),
tvix_eval::Value::String(s) => Some((***s).clone().into_string_lossy()),
_ => panic!("unexpected value type: {:?}", value),
}
}
@ -422,7 +422,7 @@ mod tests {
match value {
tvix_eval::Value::String(s) => {
assert_eq!(s, "/deep/thought");
assert_eq!(*s, "/deep/thought");
}
_ => panic!("unexpected value type: {:?}", value),
}