feat: add new metrics (AztecProtocol#3855)

This PR adds a couple of new metrics to track performance of tree
insertions and tx processing.

yarn-project/merkle-tree/src/standard_indexed_tree/standard_indexed_tree.ts

@@ -1,7 +1,9 @@
 import { toBigIntBE, toBufferBE } from '@aztec/foundation/bigint-buffer';
 import { createDebugLogger } from '@aztec/foundation/log';
+import { Timer } from '@aztec/foundation/timer';
 import { IndexedTreeLeaf, IndexedTreeLeafPreimage } from '@aztec/foundation/trees';
 import { Hasher, SiblingPath } from '@aztec/types';
+import { TreeInsertionStats } from '@aztec/types/stats';
 
 import { LevelUp } from 'levelup';
 
@@ -507,6 +509,7 @@ export class StandardIndexedTree extends TreeBase implements IndexedTree {
     leaves: Buffer[],
     subtreeHeight: SubtreeHeight,
   ): Promise<BatchInsertionResult<TreeHeight, SubtreeSiblingPathHeight>> {
+    const timer = new Timer();
     const insertedKeys = new Map<bigint, boolean>();
     const emptyLowLeafWitness = getEmptyLowLeafWitness(this.getDepth() as TreeHeight, this.leafPreimageFactory);
     // Accumulators
@@ -603,6 +606,15 @@ export class StandardIndexedTree extends TreeBase implements IndexedTree {
     // inclusion. See {@link encodeLeaf} for  a more through param explanation.
     await this.encodeAndAppendLeaves(pendingInsertionSubtree, false);
 
+    this.log(`Inserted ${leaves.length} leaves into ${this.getName()} tree`, {
+      eventName: 'tree-insertion',
+      duration: timer.ms(),
+      batchSize: leaves.length,
+      treeName: this.getName(),
+      treeDepth: this.getDepth(),
+      treeType: 'indexed',
+    } satisfies TreeInsertionStats);
+
     return {
       lowLeavesWitnessData: lowLeavesWitnesses,
       sortedNewLeaves: sortedDescendingLeafTuples.map(leafTuple => leafTuple.leaf.toBuffer()),

yarn-project/merkle-tree/src/standard_tree/standard_tree.ts

@@ -1,3 +1,6 @@
+import { Timer } from '@aztec/foundation/timer';
+import { TreeInsertionStats } from '@aztec/types/stats';
+
 import { AppendOnlySnapshotBuilder, TreeSnapshot } from '../index.js';
 import { AppendOnlyTree } from '../interfaces/append_only_tree.js';
 import { TreeBase } from '../tree_base.js';
@@ -14,7 +17,16 @@ export class StandardTree extends TreeBase implements AppendOnlyTree {
    * @returns Empty promise.
    */
   public async appendLeaves(leaves: Buffer[]): Promise<void> {
+    const timer = new Timer();
     await super.appendLeaves(leaves);
+    this.log(`Inserted ${leaves.length} leaves into ${this.getName()} tree`, {
+      eventName: 'tree-insertion',
+      duration: timer.ms(),
+      batchSize: leaves.length,
+      treeName: this.getName(),
+      treeDepth: this.getDepth(),
+      treeType: 'append-only',
+    } satisfies TreeInsertionStats);
   }
 
   public snapshot(block: number): Promise<TreeSnapshot> {

yarn-project/merkle-tree/src/tree_base.ts

@@ -1,4 +1,5 @@
 import { toBigIntLE, toBufferLE } from '@aztec/foundation/bigint-buffer';
+import { DebugLogger, createDebugLogger } from '@aztec/foundation/log';
 import { Hasher, SiblingPath } from '@aztec/types';
 
 import { LevelUp, LevelUpChain } from 'levelup';
@@ -36,6 +37,7 @@ export abstract class TreeBase implements MerkleTree {
   private root!: Buffer;
   private zeroHashes: Buffer[] = [];
   private cache: { [key: string]: Buffer } = {};
+  protected log: DebugLogger;
 
   public constructor(
     protected db: LevelUp,
@@ -58,6 +60,8 @@ export abstract class TreeBase implements MerkleTree {
 
     this.root = root ? root : current;
     this.maxIndex = 2n ** BigInt(depth) - 1n;
+
+    this.log = createDebugLogger(`aztec:merkle-tree:${name}`);
   }
 
   /**

yarn-project/pxe/src/pxe_service/pxe_service.ts

@@ -23,6 +23,7 @@ import { padArrayEnd } from '@aztec/foundation/collection';
 import { Fr } from '@aztec/foundation/fields';
 import { SerialQueue } from '@aztec/foundation/fifo';
 import { DebugLogger, createDebugLogger } from '@aztec/foundation/log';
+import { Timer } from '@aztec/foundation/timer';
 import { NoirWasmVersion } from '@aztec/noir-compiler/versions';
 import {
   AuthWitness,
@@ -52,6 +53,7 @@ import {
   getNewContractPublicFunctions,
   isNoirCallStackUnresolved,
 } from '@aztec/types';
+import { TxPXEProcessingStats } from '@aztec/types/stats';
 
 import { PXEServiceConfig, getPackageInfo } from '../config/index.js';
 import { ContractDataOracle } from '../contract_data_oracle/index.js';
@@ -353,7 +355,13 @@ export class PXEService implements PXE {
       const deployedContractAddress = txRequest.txContext.isContractDeploymentTx ? txRequest.origin : undefined;
       const newContract = deployedContractAddress ? await this.db.getContract(deployedContractAddress) : undefined;
 
+      const timer = new Timer();
       const tx = await this.#simulateAndProve(txRequest, newContract);
+      this.log(`Processed private part of ${tx.data.end.newNullifiers[0]}`, {
+        eventName: 'tx-pxe-processing',
+        duration: timer.ms(),
+        ...tx.getStats(),
+      } satisfies TxPXEProcessingStats);
       if (simulatePublic) {
         await this.#simulatePublicCalls(tx);
       }

yarn-project/scripts/src/benchmarks/aggregate.ts

@@ -24,7 +24,10 @@ import {
   NodeSyncedChainHistoryStats,
   NoteProcessorCaughtUpStats,
   Stats,
+  TreeInsertionStats,
   TxAddedToPoolStats,
+  TxPXEProcessingStats,
+  TxSequencerProcessingStats,
 } from '@aztec/types/stats';
 
 import * as fs from 'fs';
@@ -151,6 +154,26 @@ function processTxAddedToPool(entry: TxAddedToPoolStats, results: BenchmarkColle
   append(results, 'tx_size_in_bytes', entry.newContractCount, entry.size);
 }
 
+/** Process entries for events tx-private-part-processed, grouped by new commitments */
+function processTxPXEProcessingStats(entry: TxPXEProcessingStats, results: BenchmarkCollectedResults) {
+  append(results, 'tx_pxe_processing_time_ms', entry.newCommitmentCount, entry.duration);
+}
+
+/** Process entries for events tx-public-part-processed, grouped by public data writes */
+function processTxSequencerProcessingStats(entry: TxSequencerProcessingStats, results: BenchmarkCollectedResults) {
+  append(results, 'tx_sequencer_processing_time_ms', entry.publicDataUpdateRequests, entry.duration);
+}
+
+/** Process a tree insertion event and updates results */
+function processTreeInsertion(entry: TreeInsertionStats, results: BenchmarkCollectedResults) {
+  const bucket = entry.batchSize;
+  if (entry.treeType === 'append-only') {
+    append(results, 'batch_insert_into_append_only_tree_ms', bucket, entry.duration);
+  } else if (entry.treeType === 'indexed') {
+    append(results, 'batch_insert_into_indexed_tree_ms', bucket, entry.duration);
+  }
+}
+
 /** Processes a parsed entry from a log-file and updates results */
 function processEntry(entry: Stats, results: BenchmarkCollectedResults) {
   switch (entry.eventName) {
@@ -168,6 +191,12 @@ function processEntry(entry: Stats, results: BenchmarkCollectedResults) {
       return processNodeSyncedChain(entry, results);
     case 'tx-added-to-pool':
       return processTxAddedToPool(entry, results);
+    case 'tx-pxe-processing':
+      return processTxPXEProcessingStats(entry, results);
+    case 'tx-sequencer-processing':
+      return processTxSequencerProcessingStats(entry, results);
+    case 'tree-insertion':
+      return processTreeInsertion(entry, results);
     default:
       return;
   }

yarn-project/scripts/src/benchmarks/markdown.ts

@@ -95,10 +95,13 @@ function getCell(
   row: string,
   col: string,
 ) {
-  const value = data[row][col];
+  const value: number | undefined = data[row][col];
   const formattedValue = formatValue(value);
-  const baseValue = base ? (base[row] ?? {})[col] : undefined;
-  const percentDiff = baseValue ? Math.round(((value - baseValue) / baseValue) * 100) : undefined;
+  const baseValue: number | undefined = base?.[row]?.[col];
+  const percentDiff =
+    typeof baseValue === 'number' && baseValue > 0 && typeof value === 'number'
+      ? Math.round(((value - baseValue) / baseValue) * 100)
+      : undefined;
   if (!percentDiff || Math.abs(percentDiff) < 1) {
     return formattedValue;
   }
@@ -118,7 +121,11 @@ function withDesc(name: string) {
 }
 
 /** Formats a numeric value for display. */
-function formatValue(value: number) {
+function formatValue(value: number | undefined): string {
+  if (typeof value === 'undefined') {
+    return 'N/A';
+  }
+
   if (value < 100) {
     return value.toPrecision(3);
   }
@@ -180,6 +187,10 @@ export function getMarkdown() {
   const metricsByChainLength = Metrics.filter(m => m.groupBy === 'chain-length').map(m => m.name);
   const metricsByCircuitName = Metrics.filter(m => m.groupBy === 'circuit-name').map(m => m.name);
   const metricsByContractCount = Metrics.filter(m => m.groupBy === 'contract-count').map(m => m.name);
+  const metricsByLeafCount = Metrics.filter(m => m.groupBy === 'leaf-count').map(m => m.name);
+
+  const metricsTxPxeProcessing = Metrics.filter(m => m.name === 'tx_pxe_processing_time_ms').map(m => m.name);
+  const metricsTxSeqProcessing = Metrics.filter(m => m.name === 'tx_sequencer_processing_time_ms').map(m => m.name);
 
   const baseHash = process.env.BASE_COMMIT_HASH;
   const baseUrl = baseHash && `[\`${baseHash.slice(0, 8)}\`](${S3_URL}/benchmarks-v1/master/${baseHash}.json)`;
@@ -202,7 +213,7 @@ ${getWarningsSummary(benchmark, baseBenchmark)}
 
 <summary>Detailed results</summary>
 
-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. 
+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.
 ${prSourceDataText}
 ${baseCommitText}
 
@@ -221,11 +232,20 @@ ${getTableContent(pick(benchmark, metricsByChainLength), baseBenchmark, 'blocks'
 Stats on running time and I/O sizes collected for every circuit run across all benchmarks.
 ${getTableContent(transpose(pick(benchmark, metricsByCircuitName)), transpose(baseBenchmark), '', 'Circuit')}
 
+### Tree insertion stats
+
+The duration to insert a fixed batch of leaves into each tree type.
+${getTableContent(pick(benchmark, metricsByLeafCount), baseBenchmark, 'leaves')}
+
 ### Miscellaneous
 
 Transaction sizes based on how many contracts are deployed in the tx.
 ${getTableContent(pick(benchmark, metricsByContractCount), baseBenchmark, 'deployed contracts')}
 
+Transaction processing duration by data writes.
+${getTableContent(pick(benchmark, metricsTxPxeProcessing), baseBenchmark, 'new commitments')}
+${getTableContent(pick(benchmark, metricsTxSeqProcessing), baseBenchmark, 'public data writes')}
+
 </details>
 ${COMMENT_MARK}
 `;

yarn-project/sequencer-client/src/sequencer/public_processor.ts

@@ -44,7 +44,9 @@ import { computeVarArgsHash } from '@aztec/circuits.js/abis';
 import { arrayNonEmptyLength, isArrayEmpty, padArrayEnd } from '@aztec/foundation/collection';
 import { createDebugLogger } from '@aztec/foundation/log';
 import { to2Fields } from '@aztec/foundation/serialize';
+import { Timer } from '@aztec/foundation/timer';
 import { ContractDataSource, FunctionL2Logs, L1ToL2MessageSource, MerkleTreeId, Tx } from '@aztec/types';
+import { TxSequencerProcessingStats } from '@aztec/types/stats';
 import { MerkleTreeOperations } from '@aztec/world-state';
 
 import { getVerificationKeys } from '../index.js';
@@ -159,12 +161,23 @@ export class PublicProcessor {
 
   protected async processTx(tx: Tx): Promise<ProcessedTx> {
     if (!isArrayEmpty(tx.data.end.publicCallStack, item => item.isEmpty())) {
+      const timer = new Timer();
+
       const [publicKernelOutput, publicKernelProof, newUnencryptedFunctionLogs] = await this.processEnqueuedPublicCalls(
         tx,
       );
       tx.unencryptedLogs.addFunctionLogs(newUnencryptedFunctionLogs);
 
-      return makeProcessedTx(tx, publicKernelOutput, publicKernelProof);
+      const processedTransaction = await makeProcessedTx(tx, publicKernelOutput, publicKernelProof);
+      this.log(`Processed public part of ${tx.data.end.newNullifiers[0]}`, {
+        eventName: 'tx-sequencer-processing',
+        duration: timer.ms(),
+        publicDataUpdateRequests:
+          processedTransaction.data.end.publicDataUpdateRequests.filter(x => !x.leafSlot.isZero()).length ?? 0,
+        ...tx.getStats(),
+      } satisfies TxSequencerProcessingStats);
+
+      return processedTransaction;
     } else {
       return makeProcessedTx(tx);
     }

yarn-project/types/src/logs/log_filter.ts

@@ -1,6 +1,6 @@
 import { AztecAddress, FunctionSelector } from '@aztec/circuits.js';
 
-import { TxHash } from '../tx/index.js';
+import { TxHash } from '../tx/tx_hash.js';
 import { LogId } from './log_id.js';
 
 /**

yarn-project/types/src/stats/metrics.ts

@@ -1,7 +1,13 @@
 import { StatsEventName } from './stats.js';
 
 /** How a metric is grouped in benchmarks: by block size, by length of chain processed, or by circuit name. */
-export type MetricGroupBy = 'block-size' | 'chain-length' | 'circuit-name' | 'contract-count';
+export type MetricGroupBy =
+  | 'block-size'
+  | 'chain-length'
+  | 'circuit-name'
+  | 'contract-count'
+  | 'leaf-count'
+  | 'data-writes';
 
 /** Definition of a metric to track in benchmarks. */
 export interface Metric {
@@ -127,6 +133,30 @@ export const Metrics = [
     description: 'Size of txs received in the mempool.',
     events: ['tx-added-to-pool'],
   },
+  {
+    name: 'tx_pxe_processing_time_ms',
+    groupBy: 'data-writes',
+    description: 'Time to process the private part of a tx.',
+    events: ['tx-pxe-processing'],
+  },
+  {
+    name: 'tx_sequencer_processing_time_ms',
+    groupBy: 'data-writes',
+    description: 'Time to process the public part of a tx.',
+    events: ['tx-sequencer-processing'],
+  },
+  {
+    name: 'batch_insert_into_append_only_tree_ms',
+    groupBy: 'leaf-count',
+    description: 'Time to insert a batch of leaves into an append-only tree',
+    events: ['tree-insertion'],
+  },
+  {
+    name: 'batch_insert_into_indexed_tree_ms',
+    groupBy: 'leaf-count',
+    description: 'Time to insert a batch of leaves into an indexed tree',
+    events: ['tree-insertion'],
+  },
 ] as const satisfies readonly Metric[];
 
 /** Metric definitions to track from benchmarks. */

yarn-project/types/src/stats/stats.ts

@@ -138,6 +138,50 @@ export type TxStats = {
   newContractDataSize: number;
   /** Number of new contracts deployed in this tx. */
   newContractCount: number;
+  /** comm */
+  newCommitmentCount: number;
+  /** a */
+  newNullifierCount: number;
+};
+
+/**
+ * Stats for a tx that has been processed by the public processor.
+ */
+export type TxPXEProcessingStats = {
+  /** Name of the event. */
+  eventName: 'tx-pxe-processing';
+  /** Duration in ms. */
+  duration: number;
+} & TxStats;
+
+/**
+ * Stats for a tx that has been processed by the public processor.
+ */
+export type TxSequencerProcessingStats = {
+  /** Name of the event. */
+  eventName: 'tx-sequencer-processing';
+  /** Duration in ms. */
+  duration: number;
+  /** Count of how many public writes this tx has made. Acts as a proxy for how 'heavy' this tx */
+  publicDataUpdateRequests: number;
+} & TxStats;
+
+/**
+ * Stats for tree insertions
+ */
+export type TreeInsertionStats = {
+  /** Name of the event. */
+  eventName: 'tree-insertion';
+  /** Duration in ms. */
+  duration: number;
+  /** The size of the insertion batch */
+  batchSize: number;
+  /** The tree name */
+  treeName: string;
+  /** The tree depth */
+  treeDepth: number;
+  /** Tree type */
+  treeType: 'append-only' | 'indexed';
 };
 
 /** A new tx was added to the tx pool. */
@@ -154,7 +198,10 @@ export type Stats =
   | L2BlockBuiltStats
   | L2BlockHandledStats
   | NoteProcessorCaughtUpStats
-  | TxAddedToPoolStats;
+  | TxAddedToPoolStats
+  | TxPXEProcessingStats
+  | TxSequencerProcessingStats
+  | TreeInsertionStats;
 
 /** Set of event names across emitted stats. */
 export type StatsEventName = Stats['eventName'];