From 986e9e268e00700b96efce6aaf4b3eac3416378a Mon Sep 17 00:00:00 2001
From: Greg Fitzgerald <greg@solana.com>
Date: Tue, 12 Nov 2019 15:26:21 -0700
Subject: [PATCH] Revive the parallel bank client from v0.16 (#6903)

---
 runtime/src/bank_client.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/runtime/src/bank_client.rs b/runtime/src/bank_client.rs
index e2cb3e57f3..2c6dabf655 100644
--- a/runtime/src/bank_client.rs
+++ b/runtime/src/bank_client.rs
@@ -239,7 +239,11 @@ impl SyncClient for BankClient {
 impl BankClient {
     fn run(bank: &Bank, transaction_receiver: Receiver<Transaction>) {
         while let Ok(tx) = transaction_receiver.recv() {
-            let _ = bank.process_transaction(&tx);
+            let mut transactions = vec![tx];
+            while let Ok(tx) = transaction_receiver.try_recv() {
+                transactions.push(tx);
+            }
+            let _ = bank.process_transactions(&transactions);
         }
     }