Remove unnecessary requirements conversions (#4035)

crates/uv-requirements/src/lookahead.rs

@@ -192,13 +192,7 @@ impl<'a, Context: BuildContext> LookaheadResolver<'a, Context> {
                     })
             {
                 // If the metadata is already in the index, return it.
-                archive
-                    .metadata
-                    .requires_dist
-                    .iter()
-                    .cloned()
-                    .map(Requirement::from)
-                    .collect()
+                archive.metadata.requires_dist.clone()
             } else {
                 // Run the PEP 517 build process to extract metadata from the source distribution.
                 let archive = self
@@ -219,7 +213,7 @@ impl<'a, Context: BuildContext> LookaheadResolver<'a, Context> {
                     .distributions()
                     .done(id, Arc::new(MetadataResponse::Found(archive)));
 
-                requires_dist.into_iter().map(Requirement::from).collect()
+                requires_dist
             }
         };
 

crates/uv-resolver/src/resolution/graph.rs

@@ -11,7 +11,7 @@ use distribution_types::{
 };
 use pep440_rs::{Version, VersionSpecifier};
 use pep508_rs::{MarkerEnvironment, MarkerTree};
-use pypi_types::{ParsedUrlError, Requirement, Yanked};
+use pypi_types::{ParsedUrlError, Yanked};
 use uv_git::GitResolver;
 use uv_normalize::{ExtraName, PackageName};
 
@@ -390,14 +390,7 @@ impl ResolutionGraph {
                     dist.version_id()
                 )
             };
-            let requirements: Vec<_> = archive
-                .metadata
-                .requires_dist
-                .iter()
-                .cloned()
-                .map(Requirement::from)
-                .collect();
-            for req in manifest.apply(requirements.iter()) {
+            for req in manifest.apply(archive.metadata.requires_dist.iter()) {
                 let Some(ref marker_tree) = req.marker else {
                     continue;
                 };

crates/uv-resolver/src/resolver/mod.rs

@@ -1048,14 +1048,8 @@ impl<InstalledPackages: InstalledPackagesProvider> ResolverState<InstalledPackag
                     }
                 };
 
-                let requirements: Vec<_> = metadata
-                    .requires_dist
-                    .iter()
-                    .cloned()
-                    .map(Requirement::from)
-                    .collect();
                 let mut dependencies = PubGrubDependencies::from_requirements(
-                    &requirements,
+                    &metadata.requires_dist,
                     &self.constraints,
                     &self.overrides,
                     Some(name),