Replace dashmap with papaya

Cargo.toml

@@ -137,7 +137,6 @@ console = { version = "0.16.0", default-features = false, features = ["std"] }
 csv = { version = "1.3.0" }
 ctrlc = { version = "3.4.5" }
 cyclonedx-bom = { version = "0.8.1" }
-dashmap = { version = "6.1.0" }
 data-encoding = { version = "2.6.0" }
 diskus = { version = "0.9.0", default-features = false }
 dotenvy = { version = "0.15.7" }
@@ -183,6 +182,7 @@ miette = { version = "7.2.0", features = ["fancy-no-backtrace"] }
 nix = { version = "0.31.2", features = ["resource", "signal"] }
 open = { version = "5.3.2" }
 owo-colors = { version = "4.1.0" }
+papaya = { version = "0.2.4" }
 path-slash = { version = "0.2.1" }
 pathdiff = { version = "0.2.1" }
 percent-encoding = { version = "2.3.1" }

crates/uv-distribution/src/source/mod.rs

@@ -3025,15 +3025,15 @@ impl<'a, T: BuildContext> SourceDistributionBuilder<'a, T> {
             };
 
             if let Some(builder) = self.build_context.build_arena().remove(&build_key) {
-                debug!("Creating build environment for: {source}");
+                debug!("Reusing existing build environment for: {source}");
                 let wheel = builder.wheel(temp_dir.path()).await.map_err(Error::Build)?;
 
                 // Store the build context.
                 self.build_context.build_arena().insert(build_key, builder);
 
                 wheel
             } else {
-                debug!("Reusing existing build environment for: {source}");
+                debug!("Creating build environment for: {source}");
 
                 let builder = self
                     .build_context

crates/uv-git/Cargo.toml

@@ -27,7 +27,7 @@ uv-warnings = { workspace = true }
 
 anyhow = { workspace = true }
 cargo-util = { workspace = true }
-dashmap = { workspace = true }
+papaya = { workspace = true }
 fs-err = { workspace = true, features = ["tokio"] }
 owo-colors = { workspace = true }
 reqwest = { workspace = true }

crates/uv-git/src/resolver.rs

@@ -3,9 +3,8 @@ use std::path::PathBuf;
 use std::str::FromStr;
 use std::sync::Arc;
 
-use dashmap::DashMap;
-use dashmap::mapref::one::Ref;
 use fs_err::tokio as fs;
+use papaya::{HashMap, ResizeMode};
 use reqwest_middleware::ClientWithMiddleware;
 use tracing::debug;
 
@@ -60,18 +59,26 @@ impl GitHttpSettings {
 }
 
 /// A resolver for Git repositories.
-#[derive(Default, Clone)]
-pub struct GitResolver(Arc<DashMap<RepositoryReference, GitOid>>);
+#[derive(Clone)]
+pub struct GitResolver(Arc<HashMap<RepositoryReference, GitOid>>);
+
+impl Default for GitResolver {
+    fn default() -> Self {
+        Self(Arc::new(
+            HashMap::builder().resize_mode(ResizeMode::Blocking).build(),
+        ))
+    }
+}
 
 impl GitResolver {
     /// Inserts a new [`GitOid`] for the given [`RepositoryReference`].
     pub fn insert(&self, reference: RepositoryReference, sha: GitOid) {
-        self.0.insert(reference, sha);
+        self.0.pin().insert(reference, sha);
     }
 
     /// Returns the [`GitOid`] for the given [`RepositoryReference`], if it exists.
-    fn get(&self, reference: &RepositoryReference) -> Option<Ref<'_, RepositoryReference, GitOid>> {
-        self.0.get(reference)
+    fn get(&self, reference: &RepositoryReference) -> Option<GitOid> {
+        self.0.pin().get(reference).copied()
     }
 
     /// Return the [`GitOid`] for the given [`GitUrl`], if it is already known.
@@ -84,7 +91,7 @@ impl GitResolver {
         // If we know the precise commit already, return it.
         let reference = RepositoryReference::from(url);
         if let Some(precise) = self.get(&reference) {
-            return Some(*precise);
+            return Some(precise);
         }
 
         None
@@ -181,7 +188,7 @@ impl GitResolver {
         // single process are consistent.
         let url = {
             if let Some(precise) = self.get(&reference) {
-                Cow::Owned(url.clone().with_precise(*precise))
+                Cow::Owned(url.clone().with_precise(precise))
             } else {
                 Cow::Borrowed(url)
             }
@@ -241,7 +248,7 @@ impl GitResolver {
     pub fn precise(&self, url: GitUrl) -> Option<GitUrl> {
         let reference = RepositoryReference::from(&url);
         let precise = self.get(&reference)?;
-        Some(url.with_precise(*precise))
+        Some(url.with_precise(precise))
     }
 
     /// Returns `true` if the two Git URLs refer to the same precise commit.
@@ -263,11 +270,11 @@ impl GitResolver {
         }
 
         // Otherwise, the URLs must resolve to the same precise commit.
-        let Some(a_precise) = a.precise().or_else(|| self.get(&a_ref).map(|sha| *sha)) else {
+        let Some(a_precise) = a.precise().or_else(|| self.get(&a_ref)) else {
             return false;
         };
 
-        let Some(b_precise) = b.precise().or_else(|| self.get(&b_ref).map(|sha| *sha)) else {
+        let Some(b_precise) = b.precise().or_else(|| self.get(&b_ref)) else {
             return false;
         };
 

crates/uv-once-map/Cargo.toml

@@ -17,6 +17,6 @@ test = false
 workspace = true
 
 [dependencies]
-dashmap = { workspace = true }
 futures = { workspace = true }
+papaya = { workspace = true }
 tokio = { workspace = true }