try using dynamic whitelist

frame/balances/src/benchmarking.rs

@@ -39,8 +39,12 @@ benchmarks! {
 	// * Transfer will kill the sender account.
 	// * Transfer will create the recipient account.
 	transfer {
+		let u in 0 .. 1000;
+
 		let existential_deposit = T::ExistentialDeposit::get();
-		let caller = account("caller", 0, SEED);
+		let caller = account("caller", u, SEED);
+
+		__whitelist.append(frame_system::Account::<T>::hashed_key_for(caller));
 
 		// Give some multiple of the existential deposit + creation fee + transfer fee
 		let balance = existential_deposit.saturating_mul(ED_MULTIPLIER.into());

frame/benchmarking/src/lib.rs

@@ -583,7 +583,7 @@ macro_rules! benchmark_backend {
 				]
 			}
 
-			fn instance(&self, mut _whitelist: &[Vec<u8>], components: &[($crate::BenchmarkParameter, u32)])
+			fn instance(&self, mut __whitelist: &[Vec<u8>], components: &[($crate::BenchmarkParameter, u32)])
 				-> Result<Box<dyn FnOnce() -> Result<(), &'static str>>, &'static str>
 			{
 				$(
@@ -603,14 +603,15 @@ macro_rules! benchmark_backend {
 
 				// Add whitelist to DB
 				#[cfg(not(test))]
-				$crate::benchmarking::set_whitelist(_whitelist.to_vec());
+				$crate::benchmarking::set_whitelist(__whitelist.to_vec());
 
 				Ok(Box::new(move || -> Result<(), &'static str> { $eval; Ok(()) }))
 			}
 
 			fn verify(&self, components: &[($crate::BenchmarkParameter, u32)])
 				-> Result<Box<dyn FnOnce() -> Result<(), &'static str>>, &'static str>
 			{
+				let mut __whitelist = Vec::<Vec<u8>>::new();
 				$(
 					let $common = $common_from;
 				)*