feat: Delay l2l1 message hashing to the base rollup

[sirasistant]

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Changes to circuit sizes

Generated at commit: 3d5717546f7834507d0db8359554b2f787d10106, compared to commit: 7dca2aa2b91c86b79e8f9eb2810fc980651256a4

🧾 Summary (100% most significant diffs)

Program	ACIR opcodes (+/-)	%	Circuit size (+/-)	%
public_kernel_tail_simulated	0 ➖	0.00%	+24 ❌	+5.69%
private_kernel_empty_simulated	0 ➖	0.00%	+24 ❌	+5.65%
private_kernel_tail_simulated	0 ➖	0.00%	+24 ❌	+5.65%
public_kernel_app_logic_simulated	0 ➖	0.00%	+48 ❌	+1.34%
public_kernel_setup_simulated	0 ➖	0.00%	+48 ❌	+1.34%
public_kernel_teardown_simulated	0 ➖	0.00%	+48 ❌	+1.34%
private_kernel_tail_to_public_simulated	0 ➖	0.00%	+48 ❌	+1.34%
rollup_base	+2,696 ❌	+0.79%	+97,918 ❌	+1.15%
private_kernel_empty	+24 ❌	+1.27%	+48 ❌	+0.55%
public_kernel_tail	+2,444 ❌	+0.24%	+5,043 ❌	+0.05%
public_kernel_teardown	+188 ❌	+0.06%	-22,845 ✅	-1.36%
public_kernel_setup	+12 ❌	+0.01%	-23,027 ✅	-1.44%
public_kernel_app_logic	+188 ❌	+0.06%	-23,133 ✅	-3.74%
private_kernel_tail	-2,144 ✅	-10.35%	-97,083 ✅	-27.66%
private_kernel_tail_to_public	-1,758 ✅	-2.31%	-96,607 ✅	-35.58%

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Full diff report 👇

Program	ACIR opcodes (+/-)	%	Circuit size (+/-)	%
public_kernel_tail_simulated	1 (0)	0.00%	446 (+24)	+5.69%
private_kernel_empty_simulated	1 (0)	0.00%	449 (+24)	+5.65%
private_kernel_tail_simulated	1 (0)	0.00%	449 (+24)	+5.65%
public_kernel_app_logic_simulated	1 (0)	0.00%	3,618 (+48)	+1.34%
public_kernel_setup_simulated	1 (0)	0.00%	3,618 (+48)	+1.34%
public_kernel_teardown_simulated	1 (0)	0.00%	3,618 (+48)	+1.34%
private_kernel_tail_to_public_simulated	1 (0)	0.00%	3,621 (+48)	+1.34%
rollup_base	344,426 (+2,696)	+0.79%	8,608,937 (+97,918)	+1.15%
private_kernel_empty	1,919 (+24)	+1.27%	8,735 (+48)	+0.55%
public_kernel_tail	1,004,156 (+2,444)	+0.24%	9,273,080 (+5,043)	+0.05%
public_kernel_teardown	296,066 (+188)	+0.06%	1,657,162 (-22,845)	-1.36%
public_kernel_setup	216,967 (+12)	+0.01%	1,576,422 (-23,027)	-1.44%
public_kernel_app_logic	294,456 (+188)	+0.06%	595,988 (-23,133)	-3.74%
private_kernel_tail	18,565 (-2,144)	-10.35%	253,933 (-97,083)	-27.66%
private_kernel_tail_to_public	74,403 (-1,758)	-2.31%	174,909 (-96,607)	-35.58%

[AztecBot]

Benchmark results

Metrics with a significant change:

• protocol_circuit_simulation_time_in_ms (private-kernel-tail-to-public): 2,572 (-44%)
• avm_simulation_time_ms (Token:_increase_public_balance): 62.6 (+563%)

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	5,911 (+3%)	1,608 (+4%)	721 (+2%)	742	792 (+4%)
proof_construction_time_sha256_30_ms	12,454 (+6%)	3,362 (+7%)	1,496 (+5%)	1,502 (+4%)	1,534 (+2%)
proof_construction_time_sha256_100_ms	46,197 (+5%)	13,026 (+5%)	6,302 (+10%)	6,079 (+9%)	5,975 (+8%)
proof_construction_time_poseidon_hash_ms	80.0 (+3%)	35.0 (+3%)	35.0 (+3%)	60.0	90.0 (+2%)
proof_construction_time_poseidon_hash_30_ms	1,569 (+3%)	427 (+3%)	206 (+3%)	227 (+2%)	272 (+1%)
proof_construction_time_poseidon_hash_100_ms	5,773 (+3%)	1,566 (+3%)	699 (+4%)	754 (+4%)	776 (+4%)

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	740	740	740
l1_rollup_calldata_gas	6,680	6,720	6,716
l1_rollup_execution_gas	611,947	612,138	612,285
l2_block_processing_time_in_ms	237 (-4%)	444 (-4%)	804 (-2%)
l2_block_building_time_in_ms	9,456 (+1%)	18,089 (-2%)	36,807
l2_block_rollup_simulation_time_in_ms	9,456 (+1%)	18,089 (-2%)	36,806
l2_block_public_tx_process_time_in_ms	7,897 (+1%)	16,352 (-2%)	34,942

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	2,631 (-6%)	3,605 (-5%)
node_database_size_in_bytes	12,697,680 (-1%)	16,896,080
pxe_database_size_in_bytes	16,254	26,813

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	proof_size_in_bytes	num_public_inputs	size_in_gates
private-kernel-init	102 (+6%)	395 (+2%)	21,846	44,858	N/A	N/A	N/A	N/A
private-kernel-inner	176 (+5%)	699 (+2%)	72,545	45,005	N/A	N/A	N/A	N/A
private-kernel-tail	672 (-3%)	802 (-3%)	53,216 (-1%)	50,574 (+2%)	N/A	N/A	N/A	N/A
base-parity	5.82	594 (+1%)	160	96.0	1,792 (+4%)	13,188	19.0	65,536
root-parity	110 (+1%)	127 (-1%)	69,084	96.0	31,103 (+2%)	13,188	19.0	4,194,304
base-rollup	2,946	5,349 (+1%)	182,736	664	99,085 (+3%)	14,020	45.0	16,777,216
root-rollup	97.7 (+1%)	116 (-2%)	54,525	716	28,790 (+1%)	13,988	44.0	4,194,304
public-kernel-setup	89.7 (-1%)	2,808	103,513 (+1%)	70,710 (+1%)	17,944 (+3%)	128,708 (+1%)	3,629 (+1%)	2,097,152
public-kernel-app-logic	104	4,164 (+2%)	103,513 (+1%)	70,710 (+1%)	10,347 (-3%)	128,708 (+1%)	3,629 (+1%)	1,048,576
public-kernel-tail	566 (-1%)	30,666 (+10%)	403,238	11,326 (+4%)	102,856 (-1%)	27,204 (+3%)	457 (+6%)	16,777,216
private-kernel-reset-tiny	197 (-21%)	827	68,621	44,750	N/A	N/A	N/A	N/A
private-kernel-tail-to-public	⚠️ 2,572 (-44%)	1,534 (-1%)	942,862 (-4%)	1,697	N/A	N/A	N/A	N/A
public-kernel-teardown	85.9 (+1%)	4,192 (+3%)	103,513 (+1%)	70,710 (+1%)	18,882 (-2%)	128,708 (+1%)	3,629 (+1%)	2,097,152
merge-rollup	59.4 (-1%)	N/A	35,742	664	N/A	N/A	N/A	N/A
undefined	N/A	N/A	N/A	N/A	150,892 (-3%)	N/A	N/A	N/A

Stats on running time collected for app circuits

Function	input_size_in_bytes	output_size_in_bytes	witness_generation_time_in_ms	proof_size_in_bytes	proving_time_in_ms
ContractClassRegisterer:register	1,344	11,731	336 (+1%)	N/A	N/A
ContractInstanceDeployer:deploy	1,408	11,731	18.0 (+1%)	N/A	N/A
MultiCallEntrypoint:entrypoint	1,920	11,731	473 (+1%)	N/A	N/A
GasToken:deploy	1,376	11,731	382 (+2%)	N/A	N/A
SchnorrAccount:constructor	1,312	11,731	175 (+1%)	N/A	N/A
SchnorrAccount:entrypoint	2,304	11,731	560	N/A	N/A
Token:privately_mint_private_note	1,280	11,731	218 (+1%)	N/A	N/A
FPC:fee_entrypoint_public	1,344	11,731	33.8 (-5%)	N/A	N/A
Token:transfer	1,312	11,731	797 (+2%)	N/A	N/A
AuthRegistry:set_authorized (avm)	18,491	N/A	N/A	147,456	2,562 (+3%)
FPC:prepare_fee (avm)	22,958	N/A	N/A	147,520	3,237 (+4%)
Token:transfer_public (avm)	61,614	N/A	N/A	147,520	17,682 (+1%)
AuthRegistry:consume (avm)	41,719	N/A	N/A	147,488	7,560 (+2%)
FPC:pay_refund (avm)	26,227	N/A	N/A	147,488	7,334 (+1%)
Benchmarking:create_note	1,344	11,731	166 (-2%)	N/A	N/A
SchnorrAccount:verify_private_authwit	1,280	11,731	27.7 (+1%)	N/A	N/A
Token:unshield	1,376	11,731	752 (+2%)	N/A	N/A
FPC:fee_entrypoint_private	1,376	11,731	1,001 (+3%)	N/A	N/A

AVM Simulation

Time to simulate various public functions in the AVM.

Function	time_ms	bytecode_size_in_bytes
GasToken:_increase_public_balance	92.1 (+3%)	8,139
GasToken:set_portal	10.9 (+13%)	2,362
Token:constructor	118	31,107
FPC:constructor	92.4	24,011
GasToken:mint_public	77.4 (+1%)	6,150
Token:mint_public	88.7 (+6%)	11,720
Token:assert_minter_and_mint	77.2 (-11%)	8,028
AuthRegistry:set_authorized	8.55 (-4%)	4,537
FPC:prepare_fee	294 (-5%)	8,812
Token:transfer_public	34.5 (+23%)	47,374
FPC:pay_refund	69.6	12,114
Benchmarking:increment_balance	974 (-1%)	7,450
Token:_increase_public_balance	⚠️ 62.6 (+563%)	8,960
FPC:pay_refund_with_shielded_rebate	139	12,663

Public DB Access

Time to access various public DBs.

Function	time_ms
get-nullifier-index	0.149 (-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	2.09 (-2%)	3.79	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_16_depth_hash_count	16.8	31.7	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_16_depth_hash_ms	0.109 (-2%)	0.107	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_32_depth_ms	N/A	N/A	10.8	17.5 (-2%)	30.3 (-1%)	60.5 (-1%)	112 (-7%)
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	0.104	0.102 (-1%)	0.0988 (-1%)	0.104 (-1%)	0.101 (-5%)
batch_insert_into_indexed_tree_20_depth_ms	N/A	N/A	13.9	25.2 (-3%)	43.0 (-1%)	88.3 (+5%)	161 (-4%)
batch_insert_into_indexed_tree_20_depth_hash_count	N/A	N/A	109	207	355	691	1,363
batch_insert_into_indexed_tree_20_depth_hash_ms	N/A	N/A	0.106	0.102 (-2%)	0.105 (-1%)	0.109 (+5%)	0.102 (-4%)
batch_insert_into_indexed_tree_40_depth_ms	N/A	N/A	16.3 (-2%)	N/A	N/A	N/A	N/A
batch_insert_into_indexed_tree_40_depth_hash_count	N/A	N/A	133	N/A	N/A	N/A	N/A
batch_insert_into_indexed_tree_40_depth_hash_ms	N/A	N/A	0.104 (-1%)	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	63,596 (+1%)	665,010

Transaction size based on fee payment method

| Metric | |
| - | |

[LeilaWang]

Nice work! 🔥