diff --git a/Cargo.lock b/Cargo.lock
index b262d55..6b1830d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -126,6 +126,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "anes"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b46cbb362ab8752921c97e041f5e366ee6297bd428a31275b9fcf1e380f7299"
+
 [[package]]
 name = "ansi_term"
 version = "0.12.1"
@@ -783,6 +789,12 @@ dependencies = [
  "thiserror",
 ]
 
+[[package]]
+name = "cast"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
+
 [[package]]
 name = "cc"
 version = "1.0.91"
@@ -820,6 +832,33 @@ dependencies = [
  "windows-targets 0.52.4",
 ]
 
+[[package]]
+name = "ciborium"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42e69ffd6f0917f5c029256a24d0161db17cea3997d185db0d35926308770f0e"
+dependencies = [
+ "ciborium-io",
+ "ciborium-ll",
+ "serde",
+]
+
+[[package]]
+name = "ciborium-io"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05afea1e0a06c9be33d539b876f1ce3692f4afea2cb41f740e7743225ed1c757"
+
+[[package]]
+name = "ciborium-ll"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57663b653d948a338bfb3eeba9bb2fd5fcfaecb9e199e87e1eda4d9e8b240fd9"
+dependencies = [
+ "ciborium-io",
+ "half",
+]
+
 [[package]]
 name = "cipher"
 version = "0.3.0"
@@ -999,6 +1038,42 @@ dependencies = [
  "cfg-if 1.0.0",
 ]
 
+[[package]]
+name = "criterion"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7c76e09c1aae2bc52b3d2f29e13c6572553b30c4aa1b8a49fd70de6412654cb"
+dependencies = [
+ "anes",
+ "atty",
+ "cast",
+ "ciborium",
+ "clap 3.2.25",
+ "criterion-plot",
+ "itertools 0.10.5",
+ "lazy_static",
+ "num-traits",
+ "oorandom",
+ "plotters",
+ "rayon",
+ "regex",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "tinytemplate",
+ "walkdir",
+]
+
+[[package]]
+name = "criterion-plot"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6b50826342786a51a89e2da3a28f1c32b06e387201bc2d19791f622c673706b1"
+dependencies = [
+ "cast",
+ "itertools 0.10.5",
+]
+
 [[package]]
 name = "crossbeam-channel"
 version = "0.5.12"
@@ -1659,6 +1734,16 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "half"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6dd08c532ae367adf81c312a4580bc67f1d0fe8bc9c460520283f4c0ff277888"
+dependencies = [
+ "cfg-if 1.0.0",
+ "crunchy",
+]
+
 [[package]]
 name = "hash32"
 version = "0.2.1"
@@ -2313,6 +2398,7 @@ dependencies = [
  "async-channel",
  "async-trait",
  "clap 3.2.25",
+ "criterion",
  "futures 0.3.30",
  "itertools 0.10.5",
  "jsonrpc-core 18.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2765,6 +2851,12 @@ version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
+[[package]]
+name = "oorandom"
+version = "11.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b410bbe7e14ab526a0e86877eb47c6996a2bd7746f027ba551028c925390e4e9"
+
 [[package]]
 name = "opaque-debug"
 version = "0.3.1"
@@ -3014,6 +3106,34 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b4596b6d070b27117e987119b4dac604f3c58cfb0b191112e24771b2faeac1a6"
 
+[[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 = "polyval"
 version = "0.5.3"
@@ -3753,6 +3873,15 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ef703b7cb59335eae2eb93ceb664c0eb7ea6bf567079d843e09420219668e072"
 
+[[package]]
+name = "same-file"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "schannel"
 version = "0.1.23"
@@ -5218,6 +5347,16 @@ dependencies = [
  "zeroize",
 ]
 
+[[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 = "1.6.0"
@@ -5793,6 +5932,16 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 
+[[package]]
+name = "walkdir"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29790946404f91d9c5d06f9874efddea1dc06c5efe94541a7d6863108e3a5e4b"
+dependencies = [
+ "same-file",
+ "winapi-util",
+]
+
 [[package]]
 name = "want"
 version = "0.3.1"
diff --git a/connector/Cargo.toml b/connector/Cargo.toml
index 5d8acb5..47915d0 100644
--- a/connector/Cargo.toml
+++ b/connector/Cargo.toml
@@ -8,6 +8,10 @@ description = "Listen to Solana account updates via geyser or websockets"
 
 [lib]
 
+[[bench]]
+name = "chaindata_bench"
+harness = false
+
 [features]
 default = []
 
@@ -51,3 +55,5 @@ yellowstone-grpc-proto = { workspace = true }
 
 [dev-dependencies]
 clap = { workspace = true }
+# cannot upgrade due to clap_lex requirement MSRV 1.74
+criterion = "0.4.0"
diff --git a/connector/benches/chaindata_bench.rs b/connector/benches/chaindata_bench.rs
new file mode 100644
index 0000000..6b4c40a
--- /dev/null
+++ b/connector/benches/chaindata_bench.rs
@@ -0,0 +1,44 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+use mango_feeds_connector::chain_data::{update_slotvec_logic, AccountData};
+use solana_sdk::account::AccountSharedData;
+use solana_sdk::pubkey::Pubkey;
+use std::hint::black_box;
+
+fn given_v1235(dummy_account_data: AccountSharedData) -> Vec<AccountData> {
+    vec![
+        AccountData {
+            slot: 10,
+            write_version: 10010,
+            account: dummy_account_data.clone(),
+        },
+        AccountData {
+            slot: 20,
+            write_version: 10020,
+            account: dummy_account_data.clone(),
+        },
+        AccountData {
+            slot: 30,
+            write_version: 10030,
+            account: dummy_account_data.clone(),
+        },
+        // no 40
+        AccountData {
+            slot: 50,
+            write_version: 10050,
+            account: dummy_account_data.clone(),
+        },
+    ]
+}
+
+fn criterion_benchmark(c: &mut Criterion) {
+    // overwrite if an entry for the slot already exists, otherwise insert
+    let dummy_account_data = AccountSharedData::new(99999999, 999999, &Pubkey::new_unique());
+    let v = given_v1235(dummy_account_data);
+
+    c.bench_function("update_slotvec_logic", |b| {
+        b.iter(|| update_slotvec_logic(black_box(&v), 40, 10040))
+    });
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);
diff --git a/connector/src/chain_data.rs b/connector/src/chain_data.rs
index a243454..368a462 100644
--- a/connector/src/chain_data.rs
+++ b/connector/src/chain_data.rs
@@ -1,6 +1,6 @@
 use crate::chain_data::SlotVectorEffect::*;
-use log::trace;
-use smallvec::{SmallVec, smallvec};
+use log::{info, trace};
+use smallvec::{smallvec, SmallVec};
 use solana_sdk::clock::Slot;
 use {
     solana_sdk::account::{AccountSharedData, ReadableAccount},
@@ -184,7 +184,8 @@ impl ChainData {
                 v.insert(smallvec![account]);
             }
             Entry::Occupied(o) => {
-                let v_effect = update_slotvec_logic(o.get().as_slice(), account.slot, account.write_version);
+                let v_effect =
+                    update_slotvec_logic(o.get().as_slice(), account.slot, account.write_version);
 
                 let v = o.into_mut();