feat: Optimize allocating immediate amounts of memory

[sirasistant]

No description provided.

[AztecBot]

Benchmark results

Metrics with a significant change:

• protocol_circuit_simulation_time_in_ms (private-kernel-tail-to-public): 795 (-43%)
• avm_simulation_time_ms (FeeJuice:_increase_public_balance): 132 (+201%)
• avm_simulation_time_ms (Token:transfer_public): 14.0 (-41%)

Detailed results

All benchmarks are run on txs on the Benchmarking contract on the repository. Each tx consists of a batch call to create_note and increment_balance, which guarantees that each tx has a private call, a nested private call, a public call, and a nested public call, as well as an emitted private note, an unencrypted log, and public storage read and write.

This benchmark source data is available in JSON format on S3 here.

Proof generation

Each column represents the number of threads used in proof generation.

Metric	1 threads	4 threads	16 threads	32 threads	64 threads
proof_construction_time_sha256_ms	5,815 (+1%)	1,554	697	756 (+1%)	770 (-1%)
proof_construction_time_sha256_30_ms	11,524	3,067	1,370 (+1%)	1,417 (+1%)	1,453
proof_construction_time_sha256_100_ms	45,782 (+1%)	11,886 (-1%)	5,388	5,420	5,349
proof_construction_time_poseidon_hash_ms	79.0	34.0	34.0	58.0 (+2%)	89.0 (+1%)
proof_construction_time_poseidon_hash_30_ms	1,533	418	199 (-1%)	221 (-4%)	265 (-3%)
proof_construction_time_poseidon_hash_100_ms	5,717 (+1%)	1,512	675	727	745

L2 block published to L1

Each column represents the number of txs on an L2 block published to L1.

Metric	4 txs	8 txs	16 txs
l1_rollup_calldata_size_in_bytes	4,612	8,260	15,524
l1_rollup_calldata_gas	52,708	97,632	186,920
l1_rollup_execution_gas	821,704	1,558,036	3,348,759
l2_block_processing_time_in_ms	250 (-1%)	449	798 (-3%)
l2_block_building_time_in_ms	9,193	17,980 (-1%)	36,123
l2_block_rollup_simulation_time_in_ms	9,192	17,980 (-1%)	36,123
l2_block_public_tx_process_time_in_ms	7,823 (+1%)	16,590 (-1%)	34,694

L2 chain processing

Each column represents the number of blocks on the L2 chain where each block has 8 txs.

Metric	3 blocks	5 blocks
node_history_sync_time_in_ms	3,144	4,028 (-1%)
node_database_size_in_bytes	14,217,456	18,190,576
pxe_database_size_in_bytes	16,258	26,818

Circuits stats

Stats on running time and I/O sizes collected for every kernel circuit run across all benchmarks.

Circuit	simulation_time_in_ms	witness_generation_time_in_ms	input_size_in_bytes	output_size_in_bytes	proving_time_in_ms
private-kernel-init	73.2 (-1%)	378	20,951	44,933	N/A
private-kernel-inner	140 (-1%)	685	71,774	45,067	N/A
private-kernel-reset-tiny	330 (+5%)	688	64,265	44,922	N/A
private-kernel-tail	149 (-1%)	130 (+1%)	50,547	57,178	N/A
base-parity	6.03	N/A	160	96.0	N/A
root-parity	35.7 (+1%)	N/A	73,964	96.0	N/A
base-rollup	2,073 (-2%)	N/A	189,128	664	N/A
block-root-rollup	42.1	N/A	58,217	2,448	N/A
public-kernel-setup	85.6	N/A	114,433	79,670	N/A
public-kernel-app-logic	97.7 (-1%)	N/A	114,251	79,670	N/A
public-kernel-tail	564 (-1%)	N/A	487,098	16,414	N/A
private-kernel-reset-small	289	N/A	66,345	45,629	N/A
private-kernel-tail-to-public	⚠️ 795 (-43%)	599	446,385	1,825	N/A
public-kernel-teardown	84.7	N/A	114,697	79,670	N/A
merge-rollup	20.3 (-3%)	N/A	38,182	664	N/A
undefined	N/A	N/A	N/A	N/A	107,179 (+5%)

Stats on running time collected for app circuits

Function	input_size_in_bytes	output_size_in_bytes	witness_generation_time_in_ms
ContractClassRegisterer:register	1,344	11,731	345 (+1%)
ContractInstanceDeployer:deploy	1,408	11,731	18.1
MultiCallEntrypoint:entrypoint	1,920	11,731	423
FeeJuice:deploy	1,376	11,731	382 (-2%)
SchnorrAccount:constructor	1,312	11,731	62.3 (-1%)
SchnorrAccount:entrypoint	2,336	11,731	369
FeeJuice:claim	1,344	11,731	35.4 (+5%)
Token:privately_mint_private_note	1,280	11,731	69.9 (-3%)
FPC:fee_entrypoint_public	1,344	11,731	22.5 (+11%)
Token:transfer	1,312	11,731	206
Benchmarking:create_note	1,344	11,731	75.2 (-1%)
SchnorrAccount:verify_private_authwit	1,280	11,731	25.1 (+1%)
Token:unshield	1,376	11,731	490 (+1%)
FPC:fee_entrypoint_private	1,376	11,731	652 (+1%)

AVM Simulation

Time to simulate various public functions in the AVM.

Function	time_ms	bytecode_size_in_bytes
FeeJuice:_increase_public_balance	⚠️ 132 (+201%)	1,172 (-2%)
FeeJuice:set_portal	9.59 (-10%)	1,149 (-3%)
Token:constructor	263 (+4%)	7,311 (-2%)
FPC:constructor	47.0	4,743 (-2%)
FeeJuice:check_balance	37.1 (+1%)	999
Token:mint_public	41.8 (-5%)	2,087 (-2%)
Token:assert_minter_and_mint	263 (+9%)	1,404 (-2%)
AuthRegistry:set_authorized	37.0 (-2%)	501
FPC:prepare_fee	60.6 (-2%)	1,334 (-3%)
Token:transfer_public	⚠️ 14.0 (-41%)	5,482 (-1%)
FPC:pay_refund	37.8 (-12%)	1,840 (-4%)
Benchmarking:increment_balance	978 (-1%)	1,531 (-3%)
Token:_increase_public_balance	37.1 (-6%)	1,163
FPC:pay_refund_with_shielded_rebate	53.1 (+1%)	1,844 (-4%)

Public DB Access

Time to access various public DBs.

Function	time_ms
get-nullifier-index	0.159 (-3%)

Tree insertion stats

The duration to insert a fixed batch of leaves into each tree type.

Metric	1 leaves	16 leaves	64 leaves	128 leaves	256 leaves	512 leaves	1024 leaves
batch_insert_into_append_only_tree_16_depth_ms	2.14 (-1%)	3.79 (-1%)	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_16_depth_hash_count	16.7	31.8	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_16_depth_hash_ms	0.112 (-1%)	0.106 (-1%)	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_32_depth_ms	N/A	N/A	11.1 (-1%)	17.4 (-1%)	30.5 (-1%)	58.9 (-3%)	113
batch_insert_into_append_only_tree_32_depth_hash_count	N/A	N/A	95.9	159	287	543	1,055
batch_insert_into_append_only_tree_32_depth_hash_ms	N/A	N/A	0.106 (-1%)	0.101 (-1%)	0.0992 (-1%)	0.102 (-3%)	0.101
batch_insert_into_indexed_tree_20_depth_ms	N/A	N/A	14.2 (-2%)	25.8 (-2%)	43.5 (-1%)	82.1 (-2%)	164 (+1%)
batch_insert_into_indexed_tree_20_depth_hash_count	N/A	N/A	109	207	357	691	1,363
batch_insert_into_indexed_tree_20_depth_hash_ms	N/A	N/A	0.108 (-2%)	0.105 (-1%)	0.105 (+2%)	0.101 (-3%)	0.101 (-2%)
batch_insert_into_indexed_tree_40_depth_ms	N/A	N/A	16.0 (-1%)	N/A	N/A	N/A	N/A
batch_insert_into_indexed_tree_40_depth_hash_count	N/A	N/A	129	N/A	N/A	N/A	N/A
batch_insert_into_indexed_tree_40_depth_hash_ms	N/A	N/A	0.105 (-2%)	N/A	N/A	N/A	N/A

Miscellaneous

Transaction sizes based on how many contract classes are registered in the tx.

Metric	0 registered classes	1 registered classes
tx_size_in_bytes	72,419	668,302

Transaction size based on fee payment method

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