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Benchmark Transfer PoV Size with Increasing Numbers of Users (#8571)

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* write benchmark for transfer increasing users

* cargo run --release --features=runtime-benchmarks --manifest-path=bin/node/cli/Cargo.toml -- benchmark --chain=dev --steps=50 --repeat=20 --pallet=pallet_balances --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --output=./frame/balances/src/weights.rs --template=./.maintain/frame-weight-template.hbs

Co-authored-by: Parity Benchmarking Bot <admin@parity.io>
This commit is contained in:
Shawn Tabrizi
2021-04-10 14:31:45 +02:00
committed by GitHub
parent 8608c2eae4
commit fe775ab954
2 changed files with 45 additions and 12 deletions
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substrate/frame/balances/src/benchmarking.rs
+33
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@@ -143,6 +143,39 @@ benchmarks_instance_pallet! {
assert_eq!(Balances::<T, I>::free_balance(&source), Zero::zero());
assert_eq!(Balances::<T, I>::free_balance(&recipient), transfer_amount);
}
// This benchmark performs the same operation as `transfer` in the worst case scenario,
// but additionally introduces many new users into the storage, increasing the the merkle
// trie and PoV size.
#[extra]
transfer_increasing_users {
// 1_000 is not very much, but this upper bound can be controlled by the CLI.
let u in 0 .. 1_000;
let existential_deposit = T::ExistentialDeposit::get();
let caller = whitelisted_caller();
// Give some multiple of the existential deposit + creation fee + transfer fee
let balance = existential_deposit.saturating_mul(ED_MULTIPLIER.into());
let _ = <Balances<T, I> as Currency<_>>::make_free_balance_be(&caller, balance);
// Transfer `e - 1` existential deposits + 1 unit, which guarantees to create one account,
// and reap this user.
let recipient: T::AccountId = account("recipient", 0, SEED);
let recipient_lookup: <T::Lookup as StaticLookup>::Source = T::Lookup::unlookup(recipient.clone());
let transfer_amount = existential_deposit.saturating_mul((ED_MULTIPLIER - 1).into()) + 1u32.into();
// Create a bunch of users in storage.
for i in 0 .. u {
// The `account` function uses `blake2_256` to generate unique accounts, so these
// should be quite random and evenly distributed in the trie.
let new_user: T::AccountId = account("new_user", i, SEED);
let _ = <Balances<T, I> as Currency<_>>::make_free_balance_be(&new_user, balance);
}
}: transfer(RawOrigin::Signed(caller.clone()), recipient_lookup, transfer_amount)
verify {
assert_eq!(Balances::<T, I>::free_balance(&caller), Zero::zero());
assert_eq!(Balances::<T, I>::free_balance(&recipient), transfer_amount);
}
}
impl_benchmark_test_suite!(