feat!: introduce UnconstrainedContext

[nventuro]

Continuing the work from #6442, this PR further formalizes the notion of a top-level unconstrained execution context by introducing a struct that represents it (instead of relying on the unit type). Not only is this less cryptic, it also provides access to data previously unavailable such as the current block number and contract address, which we'll need for some unconstrained getters like SharedMutable's.

The macro functions could potentially be refactored somewhat now that private, public and unconstrained are more similar, but I'm not sure we want to invest much effort there so I made the change as small as possible.

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Benchmark results

No metrics with a significant change found.

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	5,736 (-1%)	1,554 (-1%)	701 (-1%)	749 (-1%)	782
proof_construction_time_sha256_30_ms	11,833 (-2%)	3,156 (-2%)	1,407 (-1%)	1,420 (-2%)	1,466 (-2%)
proof_construction_time_sha256_100_ms	44,857 (-2%)	12,075 (-3%)	5,663 (-2%)	5,551 (-1%)	5,481 (-1%)
proof_construction_time_poseidon_hash_ms	78.0 (-1%)	34.0 (-3%)	35.0 (+3%)	58.0	87.0
proof_construction_time_poseidon_hash_30_ms	1,520 (-1%)	419 (-1%)	202	227	268
proof_construction_time_poseidon_hash_100_ms	5,748 (-1%)	1,560 (-2%)	724 (-1%)	786 (-4%)	792 (-2%)

L2 block published to L1

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

Metric	8 txs	32 txs	64 txs
l1_rollup_calldata_size_in_bytes	1,412	1,412	1,412
l1_rollup_calldata_gas	9,464	9,476	9,452
l1_rollup_execution_gas	608,000	608,012	607,988
l2_block_processing_time_in_ms	1,290 (-2%)	4,826 (-1%)	9,602
l2_block_building_time_in_ms	43,924 (-1%)	173,919 (-1%)	347,840 (-1%)
l2_block_rollup_simulation_time_in_ms	43,729 (-1%)	173,189 (-1%)	346,383 (-1%)
l2_block_public_tx_process_time_in_ms	40,505 (-1%)	169,882 (-1%)	343,102 (-1%)

L2 chain processing

Each column represents the number of blocks on the L2 chain where each block has 16 txs.

Metric	3 blocks	5 blocks
node_history_sync_time_in_ms	9,326 (-4%)	14,270 (-2%)
node_database_size_in_bytes	14,487,632	21,348,432
pxe_database_size_in_bytes	18,071	29,868

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	proving_time_in_ms	input_size_in_bytes	output_size_in_bytes	proof_size_in_bytes	num_public_inputs	size_in_gates
private-kernel-init	136 (+1%)	495	11,933 (-3%)	20,634	64,614	89,536	2,731	524,288
private-kernel-inner	407	1,006	45,216 (+1%)	92,326	64,614	89,536	2,731	2,097,152
private-kernel-tail	582 (-1%)	2,822	47,156	96,545	77,732	11,648	297	2,097,152
base-parity	6.54	890 (-1%)	2,601 (+1%)	128	64.0	2,208	2.00	131,072
root-parity	50.0	46.7 (-6%)	34,622 (+1%)	27,100	64.0	2,720	18.0	2,097,152
base-rollup	11,959	2,337 (-1%)	64,999	119,738	756	3,648	47.0	4,194,304
root-rollup	113 (+1%)	62.9 (-1%)	19,549	25,309	620	3,456	41.0	1,048,576
public-kernel-app-logic	568 (-1%)	3,469 (-2%)	39,010 (-1%)	108,073	86,550	116,768	3,582	2,097,152
public-kernel-tail	1,123 (-1%)	23,616 (+2%)	154,351 (-1%)	403,238	7,646	11,648	297	8,388,608
private-kernel-reset-small	589 (-1%)	2,074 (-1%)	40,709	120,737	64,614	89,536	2,731	2,097,152
public-kernel-setup	677	2,680	37,742	108,073	86,550	116,768	3,582	2,097,152
public-kernel-teardown	586 (+1%)	3,551 (-1%)	39,233	108,073	86,550	116,768	3,582	2,097,152
merge-rollup	28.9	N/A	N/A	16,542	756	N/A	N/A	N/A
private-kernel-tail-to-public	N/A	8,699	86,526 (+1%)	N/A	N/A	116,768	3,582	4,194,304

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	size_in_gates	num_public_inputs
ContractClassRegisterer:register	1,344	9,944	465 (-1%)	N/A	N/A	N/A	N/A
ContractInstanceDeployer:deploy	1,408	9,944	42.0	N/A	N/A	N/A	N/A
MultiCallEntrypoint:entrypoint	1,920	9,944	1,789	N/A	N/A	N/A	N/A
SchnorrAccount:constructor	1,312	9,944	1,462	N/A	N/A	N/A	N/A
SchnorrAccount:entrypoint	2,304	9,944	2,817 (+2%)	16,768	50,211 (-1%)	2,097,152	457
Token:privately_mint_private_note	1,280	9,944	1,660 (+1%)	N/A	N/A	N/A	N/A
FPC:fee_entrypoint_public	1,344	9,944	1,135	16,768	10,112 (+1%)	524,288	457
Token:transfer	1,376	9,944	5,456	16,768	48,154 (+1%)	2,097,152	457
Benchmarking:create_note	1,344	9,944	1,468 (+5%)	N/A	N/A	N/A	N/A
SchnorrAccount:spend_private_authwit	1,280	9,944	81.7	N/A	N/A	N/A	N/A
Token:unshield	1,376	9,944	3,933 (-3%)	N/A	N/A	N/A	N/A
FPC:fee_entrypoint_private	1,376	9,944	4,805 (-4%)	N/A	N/A	N/A	N/A

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	512 leaves	1024 leaves	2048 leaves	4096 leaves	32 leaves
batch_insert_into_append_only_tree_16_depth_ms	10.4 (-1%)	17.4	N/A	N/A	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	N/A	N/A
batch_insert_into_append_only_tree_16_depth_hash_ms	0.607 (-1%)	0.522	N/A	N/A	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_32_depth_ms	N/A	N/A	48.8	76.2	247	471 (-1%)	937	1,859	N/A
batch_insert_into_append_only_tree_32_depth_hash_count	N/A	N/A	95.9	159	543	1,055	2,079	4,127	N/A
batch_insert_into_append_only_tree_32_depth_hash_ms	N/A	N/A	0.498	0.469	0.449	0.440 (-1%)	0.444	0.443	N/A
batch_insert_into_indexed_tree_20_depth_ms	N/A	N/A	58.6	113	359	691 (-2%)	1,397	2,778	N/A
batch_insert_into_indexed_tree_20_depth_hash_count	N/A	N/A	106	208	692	1,363	2,707	5,395	N/A
batch_insert_into_indexed_tree_20_depth_hash_ms	N/A	N/A	0.506	0.506	0.486	0.475 (-1%)	0.482 (+1%)	0.482	N/A
batch_insert_into_indexed_tree_40_depth_ms	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	62.8 (-1%)
batch_insert_into_indexed_tree_40_depth_hash_count	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	107
batch_insert_into_indexed_tree_40_depth_hash_ms	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	0.555

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	84,053	665,267

Transaction size based on fee payment method

| Metric | |
| - | |

[benesjan]

Nice