feat!: remove backend interactions from nargo

[TomAFrench]

This is the nuclear option of separating nargo and bb. Nargo no longer downloads or interacts with bb at all.

[AztecBot]

Benchmark results

Metrics with a significant change:

• circuit_witness_generation_time_in_ms (root-parity): 295 (+47%)

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.

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	740	740	740
l1_rollup_calldata_gas	6,668	6,692	6,692
l1_rollup_execution_gas	586,853	586,877	586,877
l2_block_processing_time_in_ms	1,620	6,065	12,066 (-1%)
l2_block_building_time_in_ms	27,201	107,016	213,240 (-1%)
l2_block_rollup_simulation_time_in_ms	27,014	106,356	211,966 (-1%)
l2_block_public_tx_process_time_in_ms	11,199	43,948 (-1%)	87,518 (-2%)

L2 chain processing

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

Metric	5 blocks	10 blocks
node_history_sync_time_in_ms	18,366 (+2%)	34,100 (+2%)
node_database_size_in_bytes	22,929,488	39,612,496
pxe_database_size_in_bytes	29,868	59,425

Circuits stats

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

Circuit	circuit_simulation_time_in_ms	circuit_input_size_in_bytes	circuit_output_size_in_bytes	circuit_witness_generation_time_in_ms	circuit_proving_time_in_ms	circuit_proof_size_in_bytes
private-kernel-init	143 (+2%)	19,396	46,118	N/A	N/A	N/A
private-kernel-inner	419	72,583	46,118	N/A	N/A	N/A
private-kernel-reset	680 (+1%)	219,992	46,118	N/A	N/A	N/A
private-kernel-ordering	446 (+1%)	70,968	64,163	N/A	N/A	N/A
base-parity	8.22	128	64.0	286 (-6%)	12,815 (+1%)	2,208
root-parity	51.6 (+1%)	27,064	64.0	⚠️ 295 (+47%)	157,477 (+2%)	2,720
base-rollup	721	111,126	925	9,046	139,288	3,104
root-rollup	73.2 (+1%)	11,454	789	189 (-3%)	15,303 (-1%)	3,424
public-kernel-app-logic	156 (+1%)	78,057	68,775	312 (+6%)	486 (-5%)	90,432
public-kernel-tail	537	183,482	7,723	542 (+5%)	383 (-3%)	10,144
public-kernel-setup	127 (-2%)	78,057	68,775	343 (-3%)	466 (+2%)	90,432
public-kernel-teardown	130 (-1%)	78,057	68,775	286 (-1%)	406 (-1%)	90,432
merge-rollup	6.88 (+3%)	2,696	925	223 (+7%)	3,331 (-4%)	3,104

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	13.2 (+1%)	21.5 (+1%)	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	0.771 (+1%)	0.662	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	61.9	99.8	319	613 (+2%)	1,203	2,381	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	0.635	0.617	0.580	0.573 (+1%)	0.571	0.569	N/A
batch_insert_into_indexed_tree_20_depth_ms	N/A	N/A	73.3	144 (+1%)	455	899 (+2%)	1,781	3,548	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	0.643	0.648	0.619	0.619 (+1%)	0.617	0.617	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	80.9 (+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	108
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	0.711

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	67,453	1,052,013

Transaction size based on fee payment method

| Metric | |
| - | |

Transaction processing duration by data writes.

Metric	0 new note hashes	1 new note hashes	2 new note hashes
tx_pxe_processing_time_ms	2,952	3,075 (+1%)	7,529 (+1%)

Metric	0 public data writes	1 public data writes	2 public data writes	4 public data writes	8 public data writes
tx_sequencer_processing_time_ms	817 (-1%)	1,122	1,183	2,192 (-1%)	1,361