diff --git a/Cargo.lock b/Cargo.lock
index 3a5845a7..bb63422e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -180,6 +180,17 @@ version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
 
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi 0.1.19",
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.3.0"
@@ -565,6 +576,12 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df8670b8c7b9dae1793364eafadf7239c40d669904660c5960d74cfd80b46a53"
 
+[[package]]
+name = "cast"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
+
 [[package]]
 name = "cc"
 version = "1.1.7"
@@ -617,6 +634,17 @@ dependencies = [
  "libloading",
 ]
 
+[[package]]
+name = "clap"
+version = "2.34.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a0610544180c38b88101fecf2dd634b174a62eef6946f84dfc6a7127512b381c"
+dependencies = [
+ "bitflags 1.3.2",
+ "textwrap",
+ "unicode-width",
+]
+
 [[package]]
 name = "clap"
 version = "4.5.11"
@@ -735,6 +763,42 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "criterion"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b01d6de93b2b6c65e17c634a26653a29d107b3c98c607c765bf38d041531cd8f"
+dependencies = [
+ "atty",
+ "cast",
+ "clap 2.34.0",
+ "criterion-plot",
+ "csv",
+ "itertools 0.10.5",
+ "lazy_static",
+ "num-traits",
+ "oorandom",
+ "plotters",
+ "rayon",
+ "regex",
+ "serde",
+ "serde_cbor",
+ "serde_derive",
+ "serde_json",
+ "tinytemplate",
+ "walkdir",
+]
+
+[[package]]
+name = "criterion-plot"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2673cc8207403546f45f5fd319a974b1e6983ad1a3ee7e6041650013be041876"
+dependencies = [
+ "cast",
+ "itertools 0.10.5",
+]
+
 [[package]]
 name = "crossbeam-channel"
 version = "0.5.13"
@@ -1060,7 +1124,7 @@ checksum = "887d93f60543e9a9362ef8a21beedd0a833c5d9610e18c67abe15a5963dcb1a4"
 dependencies = [
  "bit_field",
  "flume",
- "half",
+ "half 2.4.1",
  "lebe",
  "miniz_oxide",
  "rayon-core",
@@ -1367,6 +1431,12 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "half"
+version = "1.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b43ede17f21864e81be2fa654110bf1e793774238d86ef8555c37e6519c0403"
+
 [[package]]
 name = "half"
 version = "2.4.1"
@@ -1404,6 +1474,15 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
+[[package]]
+name = "hermit-abi"
+version = "0.1.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "hermit-abi"
 version = "0.3.9"
@@ -1804,6 +1883,15 @@ dependencies = [
  "either",
 ]
 
+[[package]]
+name = "itertools"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "413ee7dfc52ee1a4949ceeb7dbc8a33f2d6c088194d9f922fb8318faf1f01186"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.11"
@@ -1844,7 +1932,7 @@ dependencies = [
  "anyhow",
  "base64 0.21.7",
  "bytecount",
- "clap",
+ "clap 4.5.11",
  "fancy-regex",
  "fraction",
  "getrandom",
@@ -2132,7 +2220,7 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4569e456d394deccd22ce1c1913e6ea0e54519f577285001215d33557431afe4"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.3.9",
  "libc",
  "wasi",
  "windows-sys 0.52.0",
@@ -2400,7 +2488,7 @@ version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4161fcb6d602d4d2081af7c3a45852d875a03dd337a6bfdd6e06407b61342a43"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.3.9",
  "libc",
 ]
 
@@ -2456,6 +2544,12 @@ dependencies = [
  "pkg-config",
 ]
 
+[[package]]
+name = "oorandom"
+version = "11.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b410bbe7e14ab526a0e86877eb47c6996a2bd7746f027ba551028c925390e4e9"
+
 [[package]]
 name = "openssl"
 version = "0.10.66"
@@ -2783,6 +2877,34 @@ version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231b230927b5e4ad203db57bbcbee2802f6bce620b1e4a9024a07d94e2907ec"
 
+[[package]]
+name = "plotters"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a15b6eccb8484002195a3e44fe65a4ce8e93a625797a063735536fd59cb01cf3"
+dependencies = [
+ "num-traits",
+ "plotters-backend",
+ "plotters-svg",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "plotters-backend"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "414cec62c6634ae900ea1c56128dfe87cf63e7caece0852ec76aba307cebadb7"
+
+[[package]]
+name = "plotters-svg"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "81b30686a7d9c3e010b84284bdd26a29f2138574f52f5eb6f794fc0ad924e705"
+dependencies = [
+ "plotters-backend",
+]
+
 [[package]]
 name = "png"
 version = "0.17.13"
@@ -3525,6 +3647,16 @@ dependencies = [
  "serde_derive",
 ]
 
+[[package]]
+name = "serde_cbor"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2bef2ebfde456fb76bbcf9f59315333decc4fda0b2b44b420243c11e0f5ec1f5"
+dependencies = [
+ "half 1.8.3",
+ "serde",
+]
+
 [[package]]
 name = "serde_derive"
 version = "1.0.204"
@@ -3891,7 +4023,7 @@ version = "2.2.1-dev0"
 dependencies = [
  "async-stream",
  "async-trait",
- "clap",
+ "clap 4.5.11",
  "cmake",
  "cxx",
  "cxx-build",
@@ -3912,7 +4044,7 @@ name = "text-generation-benchmark"
 version = "2.2.1-dev0"
 dependencies = [
  "average",
- "clap",
+ "clap 4.5.11",
  "crossterm",
  "float-ord",
  "hf-hub",
@@ -3950,7 +4082,7 @@ dependencies = [
 name = "text-generation-launcher"
 version = "2.2.1-dev0"
 dependencies = [
- "clap",
+ "clap 4.5.11",
  "ctrlc",
  "float_eq",
  "hf-hub",
@@ -3974,7 +4106,7 @@ dependencies = [
  "axum 0.7.5",
  "axum-tracing-opentelemetry",
  "base64 0.22.1",
- "clap",
+ "clap 4.5.11",
  "csv",
  "futures",
  "futures-util",
@@ -4022,13 +4154,15 @@ dependencies = [
  "axum 0.7.5",
  "axum-tracing-opentelemetry",
  "base64 0.22.1",
- "clap",
+ "clap 4.5.11",
+ "criterion",
  "futures",
  "futures-util",
  "grpc-metadata",
  "hf-hub",
  "image",
  "init-tracing-opentelemetry",
+ "itertools 0.13.0",
  "jsonschema",
  "metrics",
  "metrics-exporter-prometheus",
@@ -4062,6 +4196,15 @@ dependencies = [
  "utoipa-swagger-ui",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+dependencies = [
+ "unicode-width",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.63"
@@ -4136,6 +4279,16 @@ dependencies = [
  "time-core",
 ]
 
+[[package]]
+name = "tinytemplate"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be4d6b5f19ff7664e8c98d03e2139cb510db9b0a60b55f8e8709b689d939b6bc"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "tinyvec"
 version = "1.8.0"
diff --git a/backends/v3/Cargo.toml b/backends/v3/Cargo.toml
index 129ceb9c..06a44bec 100644
--- a/backends/v3/Cargo.toml
+++ b/backends/v3/Cargo.toml
@@ -35,8 +35,14 @@ serde = "1.0.188"
 serde_json = "1.0.107"
 slotmap = "1.0.7"
 thiserror = "1.0.48"
-tokenizers = { workspace = true}
-tokio = { version = "1.32.0", features = ["rt", "rt-multi-thread", "parking_lot", "signal", "sync"] }
+tokenizers = { workspace = true }
+tokio = { version = "1.32.0", features = [
+  "rt",
+  "rt-multi-thread",
+  "parking_lot",
+  "signal",
+  "sync",
+] }
 tokio-stream = "0.1.14"
 tower-http = { version = "0.5.1", features = ["cors"] }
 tracing = "0.1.37"
@@ -44,7 +50,9 @@ tracing-opentelemetry = "0.21.0"
 tracing-subscriber = { version = "0.3.17", features = ["json", "env-filter"] }
 utoipa = { version = "4.2.0", features = ["axum_extras"] }
 utoipa-swagger-ui = { version = "6.0.0", features = ["axum"] }
-init-tracing-opentelemetry = { version = "0.14.1", features = ["opentelemetry-otlp"] }
+init-tracing-opentelemetry = { version = "0.14.1", features = [
+  "opentelemetry-otlp",
+] }
 minijinja = { version = "2.0.2" }
 minijinja-contrib = { version = "2.0.2", features = ["pycompat"] }
 futures-util = "0.3.30"
@@ -60,8 +68,16 @@ tower = "^0.4"
 tonic-build = "0.10.1"
 prost-build = "0.12.1"
 
+[dev-dependencies]
+criterion = "0.3"
+itertools = "0.13"
+
 [features]
 default = ["ngrok"]
 ngrok = ["text-generation-router/ngrok"]
 google = ["text-generation-router/google"]
 kserve = ["text-generation-router/kserve"]
+
+[[bench]]
+name = "prefix_cache"
+harness = false
diff --git a/backends/v3/benches/prefix_cache.rs b/backends/v3/benches/prefix_cache.rs
new file mode 100644
index 00000000..d9df45b2
--- /dev/null
+++ b/backends/v3/benches/prefix_cache.rs
@@ -0,0 +1,47 @@
+use std::sync::Arc;
+
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use rand::Rng;
+
+use text_generation_router_v3::block_allocator::Allocator;
+use text_generation_router_v3::radix::RadixAllocator;
+
+fn prefix_cache_benchmark(c: &mut Criterion) {
+    // let prefixes: Vec<Vec<u32>> = (0..8192)
+    //     .chunks(256)
+    //     .into_iter()
+    //     .map(|c| c.collect())
+    //     .collect();
+
+    let mut cache = RadixAllocator::new(1, 262144, None);
+
+    c.bench_function("Radix allocator", |b| {
+        b.iter_batched(
+            || {
+                //prefixes
+                //    .choose_multiple(&mut rand::thread_rng(), 5)
+                //    .fold(Vec::new(), |mut v, s| {
+                //        v.extend(s);
+                //        v
+                //    })
+
+                (0..7936)
+                    .map(|_| rand::thread_rng().gen_range(0..1024))
+                    .collect::<Vec<u32>>()
+            },
+            |prefill| {
+                let alloc = cache.allocate(
+                    prefill.len() as u32 + 13,
+                    Some(Arc::new(black_box(prefill))),
+                );
+                if let Some(alloc) = alloc {
+                    cache.free(alloc.blocks.clone(), alloc.allocation_id);
+                }
+            },
+            criterion::BatchSize::SmallInput,
+        );
+    });
+}
+
+criterion_group!(benches, prefix_cache_benchmark);
+criterion_main!(benches);
diff --git a/backends/v3/src/block_allocator.rs b/backends/v3/src/block_allocator.rs
index 05c2bd30..c5503b8c 100644
--- a/backends/v3/src/block_allocator.rs
+++ b/backends/v3/src/block_allocator.rs
@@ -4,7 +4,7 @@ use tokio::sync::{mpsc, oneshot};
 use crate::radix::RadixAllocator;
 
 #[derive(Debug, Clone)]
-pub(crate) struct BlockAllocation {
+pub struct BlockAllocation {
     pub allocation_id: u64,
     pub blocks: Vec<u32>,
     pub slots: Vec<u32>,
@@ -25,7 +25,7 @@ impl Drop for BlockAllocation {
 }
 
 #[derive(Debug, Clone)]
-pub(crate) struct BlockAllocator {
+pub struct BlockAllocator {
     /// Channel to communicate with the background task
     block_allocator: mpsc::UnboundedSender<BlockAllocatorCommand>,
 }
@@ -128,7 +128,7 @@ enum BlockAllocatorCommand {
     },
 }
 
-pub(crate) trait Allocator {
+pub trait Allocator {
     fn allocate(
         &mut self,
         tokens: u32,
diff --git a/backends/v3/src/lib.rs b/backends/v3/src/lib.rs
index c8fc55f8..77a9a11a 100644
--- a/backends/v3/src/lib.rs
+++ b/backends/v3/src/lib.rs
@@ -1,8 +1,8 @@
 mod backend;
-mod block_allocator;
+pub mod block_allocator;
 mod client;
 mod queue;
-mod radix;
+pub mod radix;
 
 use crate::client::{ClientError, ShardedClient};
 pub(crate) use backend::BackendV3;
diff --git a/backends/v3/src/queue.rs b/backends/v3/src/queue.rs
index 13544235..0fb05a98 100644
--- a/backends/v3/src/queue.rs
+++ b/backends/v3/src/queue.rs
@@ -250,7 +250,7 @@ impl State {
 
         // Create span for this batch to add context to inference calls
         let next_batch_span = info_span!(parent: None, "batch", batch_size = tracing::field::Empty);
-        next_batch_span.follows_from(&Span::current());
+        next_batch_span.follows_from(Span::current());
 
         let mut batch_requests = Vec::with_capacity(self.entries.len());
         let mut batch_entries =
diff --git a/backends/v3/src/radix.rs b/backends/v3/src/radix.rs
index 0464b9f8..ef963532 100644
--- a/backends/v3/src/radix.rs
+++ b/backends/v3/src/radix.rs
@@ -205,6 +205,11 @@ pub struct RadixTrie {
     /// call that a real time lookup would require.
     time: u64,
 }
+impl Default for RadixTrie {
+    fn default() -> Self {
+        Self::new()
+    }
+}
 
 impl RadixTrie {
     /// Construct a new radix trie.
diff --git a/router/Cargo.toml b/router/Cargo.toml
index 1be74546..7773e212 100644
--- a/router/Cargo.toml
+++ b/router/Cargo.toml
@@ -27,8 +27,14 @@ reqwest = { version = "0.11.20", features = [] }
 serde = "1.0.188"
 serde_json = "1.0.107"
 thiserror = "1.0.48"
-tokenizers = { workspace = true}
-tokio = { version = "1.32.0", features = ["rt", "rt-multi-thread", "parking_lot", "signal", "sync"] }
+tokenizers = { workspace = true }
+tokio = { version = "1.32.0", features = [
+  "rt",
+  "rt-multi-thread",
+  "parking_lot",
+  "signal",
+  "sync",
+] }
 tokio-stream = "0.1.14"
 tower-http = { version = "0.5.1", features = ["cors"] }
 tracing = "0.1.40"
@@ -37,7 +43,9 @@ tracing-subscriber = { version = "0.3.18", features = ["json", "env-filter"] }
 utoipa = { version = "4.2.0", features = ["axum_extras"] }
 utoipa-swagger-ui = { version = "6.0.0", features = ["axum"] }
 ngrok = { version = "0.13.1", features = ["axum"], optional = true }
-init-tracing-opentelemetry = { version = "0.14.1", features = ["opentelemetry-otlp"] }
+init-tracing-opentelemetry = { version = "0.14.1", features = [
+  "opentelemetry-otlp",
+] }
 minijinja = { version = "2.0.2" }
 minijinja-contrib = { version = "2.0.2", features = ["pycompat"] }
 futures-util = "0.3.30"
@@ -46,7 +54,11 @@ once_cell = "1.19.0"
 image = "0.25.1"
 base64 = { workspace = true }
 sysinfo = "0.30.13"
-uuid = { version = "1.9.1", default-features = false, features = ["v4", "fast-rng", "macro-diagnostics"] }
+uuid = { version = "1.9.1", default-features = false, features = [
+  "v4",
+  "fast-rng",
+  "macro-diagnostics",
+] }
 csv = "1.3.0"
 ureq = "=2.9"