diff --git a/bench/Cargo.toml b/bench/Cargo.toml
index c7e0a308..c2469869 100644
--- a/bench/Cargo.toml
+++ b/bench/Cargo.toml
@@ -18,4 +18,3 @@ dirs = "5.0.0"
 rand = "0.8.5"
 rand_chacha = "0.3.1"
 futures = { workspace = true }
-
diff --git a/bench/src/main.rs b/bench/src/main.rs
index b8502cf5..a4ae94cd 100644
--- a/bench/src/main.rs
+++ b/bench/src/main.rs
@@ -1,4 +1,4 @@
-use std::sync::Arc;
+use std::{sync::Arc, collections::HashMap};
 
 use bench::{
     cli::Args,
@@ -9,9 +9,8 @@ use clap::Parser;
 use futures::future::join_all;
 use log::{error, info};
 use solana_rpc_client::nonblocking::rpc_client::RpcClient;
-use solana_sdk::{commitment_config::CommitmentConfig, signer::Signer};
+use solana_sdk::{commitment_config::CommitmentConfig, signer::Signer, signature::Keypair};
 use tokio::{
-    sync::Mutex,
     time::{Duration, Instant},
 };
 
@@ -37,12 +36,16 @@ async fn main() {
 
     let mut tasks = vec![];
 
-    for _ in 0..runs {
-        let rpc_client = Arc::new(RpcClient::new_with_commitment(
-            lite_rpc_addr.clone(),
-            CommitmentConfig::confirmed(),
-        ));
-        tasks.push(tokio::spawn(bench(rpc_client.clone(), tx_count)));
+    let funded_payer = BenchHelper::get_payer().await.unwrap();
+    println!("payer : {}", funded_payer.pubkey());
+
+    let rpc_client = Arc::new(RpcClient::new_with_commitment(
+        lite_rpc_addr.clone(),
+        CommitmentConfig::confirmed(),
+    ));
+    for seed in 0..runs {
+        let funded_payer = Keypair::from_bytes(funded_payer.to_bytes().as_slice()).unwrap();
+        tasks.push(tokio::spawn(bench(rpc_client.clone(), tx_count, funded_payer, seed as u64)));
         // wait for an interval
         run_interval_ms.tick().await;
     }
@@ -73,44 +76,48 @@ async fn main() {
     csv_writer.flush().unwrap();
 }
 
-async fn bench(rpc_client: Arc<RpcClient>, tx_count: usize) -> Metric {
-    let funded_payer = BenchHelper::get_payer().await.unwrap();
+#[derive(Clone, Debug, Copy)]
+struct TxSendData {
+    sent_duration: Duration,
+    sent_instant: Instant,
+}
 
-    println!("payer {}", funded_payer.pubkey());
+async fn bench(rpc_client: Arc<RpcClient>, tx_count: usize, funded_payer: Keypair, seed: u64) -> Metric {
     let blockhash = rpc_client.get_latest_blockhash().await.unwrap();
 
-    let txs = BenchHelper::generate_txs(tx_count, &funded_payer, blockhash, None);
+    let txs = BenchHelper::generate_txs(tx_count, &funded_payer, blockhash, Some(seed));
 
-    let metric = Arc::new(Mutex::new(Metric::default()));
-    let mut tx_sent_tasks = vec![];
+    let mut metric = Metric::default();
+    let mut map_of_txs = HashMap::new();
     for tx in txs {
         let rpc_client = rpc_client.clone();
-        let metric = metric.clone();
-        let task = tokio::spawn(async move {
-            let start_time = Instant::now();
-            let signature = rpc_client.send_transaction(&tx).await.unwrap();
-            let sent_duration = start_time.elapsed();
-            let mut confirmed = false;
-            while start_time.elapsed() < Duration::from_secs(60) {
-                tokio::time::sleep(Duration::from_millis(1)).await;
-                if let Ok(b) = rpc_client.confirm_transaction(&signature).await {
-                    if b == true {
-                        confirmed = true;
-                        break;
-                    }
+        let start_time = Instant::now();
+        if let Ok(signature) = rpc_client.send_transaction(&tx).await {
+            map_of_txs.insert( signature, TxSendData {
+                sent_duration: start_time.elapsed(),
+                sent_instant: Instant::now(),
+            });
+        }
+    }
+    let confirmation_time = Instant::now();
+    while confirmation_time.elapsed() < Duration::from_secs(60) && !map_of_txs.is_empty() {
+        let signatures = map_of_txs.iter().map(|x| x.0.clone()).collect::<Vec<_>>();
+        if let Ok(res) = rpc_client.get_signature_statuses(&signatures).await {
+            for i in 0..signatures.len() {
+                let tx_status = &res.value[i];
+                if let Some(_) = tx_status {
+                    let signature = signatures[i];
+                    let tx_data = map_of_txs.get(&signature).unwrap();
+                    metric.add_successful_transaction( tx_data.sent_duration, tx_data.sent_instant.elapsed());
+                    map_of_txs.remove(&signature);
                 }
             }
-            let send_and_confirm_time = start_time.elapsed();
-            let mut metric = metric.lock().await;
-            if confirmed {
-                metric.add_successful_transaction(sent_duration, send_and_confirm_time);
-            } else {
-                metric.add_unsuccessful_transaction();
-            }
-        });
-        tx_sent_tasks.push(task);
+        }
     }
-    futures::future::join_all(tx_sent_tasks).await;
-    let m = *metric.lock().await;
-    m
+
+    for (_, tx) in map_of_txs {
+        metric.add_unsuccessful_transaction(tx.sent_duration);
+    }
+    metric.finalize();
+    metric
 }
diff --git a/bench/src/metrics.rs b/bench/src/metrics.rs
index e55dfe11..79624d0a 100644
--- a/bench/src/metrics.rs
+++ b/bench/src/metrics.rs
@@ -1,39 +1,50 @@
 use std::{
-    ops::{AddAssign, Div, DivAssign, Mul},
+    ops::{AddAssign, DivAssign},
     time::Duration,
 };
 
 #[derive(Clone, Copy, Debug, Default, serde::Serialize)]
 pub struct Metric {
     pub txs_sent: u64,
-    pub time_to_send_txs: f64,
     pub txs_confirmed: u64,
     pub txs_un_confirmed: u64,
     pub average_confirmation_time_ms: f64,
+    pub average_time_to_send_txs: f64,
+
+    #[serde(skip_serializing)]
+    total_sent_time: Duration,
+    #[serde(skip_serializing)]
+    total_confirmation_time: Duration,
 }
 
 impl Metric {
     pub fn add_successful_transaction(
         &mut self,
         time_to_send: Duration,
-        time_to_send_and_confrim: Duration,
+        time_to_confrim: Duration,
     ) {
-        self.time_to_send_txs = (self.time_to_send_txs.mul(self.txs_confirmed as f64)
-            + time_to_send.as_millis() as f64)
-            .div(self.txs_confirmed as f64 + 1.0);
-        self.average_confirmation_time_ms = (self
-            .average_confirmation_time_ms
-            .mul(self.txs_confirmed as f64)
-            + time_to_send_and_confrim.as_millis() as f64)
-            .div(self.txs_confirmed as f64 + 1.0);
+        self.total_sent_time += time_to_send;
+        self.total_confirmation_time += time_to_confrim;
+
         self.txs_confirmed += 1;
         self.txs_sent += 1;
     }
 
-    pub fn add_unsuccessful_transaction(&mut self) {
+    pub fn add_unsuccessful_transaction(&mut self, time_to_send: Duration) {
+        self.total_sent_time += time_to_send;
         self.txs_un_confirmed += 1;
         self.txs_sent += 1;
     }
+
+    pub fn finalize(&mut self) {
+        if self.txs_sent > 0 {
+            self.average_time_to_send_txs = self.total_sent_time.as_millis() as f64 / self.txs_sent as f64;
+        }
+
+        if self.txs_confirmed > 0 {
+            self.average_confirmation_time_ms = self.total_confirmation_time.as_millis() as f64 / self.txs_confirmed as f64;
+        }
+    }
 }
 
 #[derive(Default)]
@@ -51,10 +62,12 @@ impl Metric {
 impl AddAssign<&Self> for Metric {
     fn add_assign(&mut self, rhs: &Self) {
         self.txs_sent += rhs.txs_sent;
-        self.time_to_send_txs += rhs.time_to_send_txs;
         self.txs_confirmed += rhs.txs_confirmed;
         self.txs_un_confirmed += rhs.txs_un_confirmed;
-        self.average_confirmation_time_ms += rhs.average_confirmation_time_ms;
+
+        self.total_confirmation_time += rhs.total_confirmation_time;
+        self.total_sent_time += rhs.total_sent_time;
+        self.finalize();
     }
 }
 
@@ -65,10 +78,12 @@ impl DivAssign<u64> for Metric {
             return;
         }
         self.txs_sent /= rhs;
-        self.time_to_send_txs /= rhs as f64;
         self.txs_confirmed /= rhs;
         self.txs_un_confirmed /= rhs;
-        self.average_confirmation_time_ms /= rhs as f64;
+
+        self.total_confirmation_time = Duration::from_micros((self.total_confirmation_time.as_micros() / rhs as u128) as u64);
+        self.total_sent_time = Duration::from_micros((self.total_sent_time.as_micros() / rhs as u128) as u64);
+        self.finalize();
     }
 }