change blob cache hasher to rustc_hash

Author: marvin-j97

Cargo.toml

@@ -25,7 +25,8 @@ byteorder = "1.5.0"
 log = "0.4.22"
 min-max-heap = "1.3.0"
 path-absolutize = "3.1.1"
-quick_cache = "0.6.5"
+quick_cache = { version = "0.6.5", default-features = false }
+rustc-hash = "2.0.0"
 serde = { version = "1.0.204", optional = true, features = ["derive"] }
 tempfile = "3.12.0"
 xxhash-rust = { version = "0.8.12", features = ["xxh3"] }

src/blob_cache.rs

@@ -38,7 +38,11 @@ impl Weighter<CacheKey, Item> for BlobWeighter {
 /// This speeds up consecutive accesses to the same blobs, improving
 /// read performance for hot data.
 pub struct BlobCache {
-    data: Cache<CacheKey, Item, BlobWeighter>,
+    // NOTE: rustc_hash performed best: https://fjall-rs.github.io/post/fjall-2-1
+    /// Concurrent cache implementation
+    data: Cache<CacheKey, Item, BlobWeighter, rustc_hash::FxBuildHasher>,
+
+    /// Capacity in bytes
     capacity: u64,
 }