Instrument executor submission latency

Proof: targeted executor and dashboard tests pass; npm test passes 239/239; operator dashboard bundle builds; git diff --check passes.

Assumptions: timing fields are observational only and do not change quote response policy, signing, concurrency, arming, or live funds behavior.

Still fake: venue-native terminal fill ids and fee-complete realized PnL remain unavailable.

src/apps/trade-executor.mjs

@@ -1,4 +1,5 @@
 import process from 'node:process';
+import { performance } from 'node:perf_hooks';
 
 import { createConsumer } from '../bus/kafka/consumer.mjs';
 import { createProducer } from '../bus/kafka/producer.mjs';
@@ -179,6 +180,7 @@ await consumer.run({
 
 async function handleCommand(event) {
   const payload = event.payload;
+  const timing = startExecutorTiming(event);
   state.last_command = payload;
 
   const existing = stateStore.get(payload.command_id);
@@ -194,22 +196,22 @@ async function handleCommand(event) {
   }
 
   if (isMakerSuppressedForOwnRequest()) {
-    await publishResult(payload, {
+    await publishResult(payload, withExecutorTiming({
       status: 'rejected',
       result_code: 'own_request_preflight_in_progress',
       note: 'Own request preflight is suppressing maker quote responses to avoid self-matching.',
-    });
+    }, timing));
     return;
   }
 
   if (state.paused) return;
 
   if (!state.armed) {
-    await publishResult(payload, {
+    await publishResult(payload, withExecutorTiming({
       status: 'rejected',
       result_code: 'executor_disarmed',
       note: 'executor is disarmed',
-    });
+    }, timing));
     return;
   }
 
@@ -222,7 +224,7 @@ async function handleCommand(event) {
         message: expiry.reason,
       },
     });
-    await publishResult(payload, {
+    await publishResult(payload, withExecutorTiming({
       status: 'rejected',
       result_code: 'stale_execute_command',
       note: 'execute command deadline elapsed before relay submission',
@@ -230,7 +232,7 @@ async function handleCommand(event) {
       command_deadline_ms: expiry.deadline_ms == null ? null : String(expiry.deadline_ms),
       command_deadline_at: expiry.deadline_at,
       stale_reason: expiry.reason,
-    });
+    }, timing));
     return;
   }
 
@@ -242,27 +244,46 @@ async function handleCommand(event) {
   state.in_flight_count += 1;
 
   try {
-    const currentSaltHex = await verifierClient.currentSalt();
-    const submission = buildQuoteResponseSubmission({
+    const saltStartMs = performance.now();
+    let currentSaltHex;
+    try {
+      currentSaltHex = await verifierClient.currentSalt();
+    } finally {
+      recordExecutorTiming(timing, 'current_salt_ms', saltStartMs);
+    }
+
+    const signStartMs = performance.now();
+    let submission;
+    try {
+      submission = buildQuoteResponseSubmission({
         command: payload,
         signerAccountId: config.nearIntentsAccountId,
         signer,
         verifierContract: config.nearVerifierContract,
         currentSaltHex,
       });
+    } finally {
+      recordExecutorTiming(timing, 'sign_ms', signStartMs);
+    }
     state.last_request = submission;
 
-    const response = await relayClient.request('quote_response', [submission], {
+    const relayStartMs = performance.now();
+    let response;
+    try {
+      response = await relayClient.request('quote_response', [submission], {
         timeoutMs: config.executorResponseTimeoutMs,
       });
+    } finally {
+      recordExecutorTiming(timing, 'relay_response_ms', relayStartMs);
+    }
     state.last_venue_response = response;
     state.last_error = null;
 
-    await publishResult(payload, {
+    await publishResult(payload, withExecutorTiming({
       status: 'submitted',
       result_code: response === 'OK' ? 'quote_response_ok' : 'quote_response_ack',
       venue_response: response,
-    });
+    }, timing));
     stateStore.markSubmitted(payload.command_id, {
       quote_id: payload.quote_id,
       result: response,
@@ -274,11 +295,11 @@ async function handleCommand(event) {
       quote_id: payload.quote_id,
       error: serializeError(error),
     });
-    await publishResult(payload, {
+    await publishResult(payload, withExecutorTiming({
       status: 'failed',
       result_code: 'submission_failed',
       error: serializeError(error),
-    });
+    }, timing));
   } finally {
     state.in_flight_count = Math.max(0, state.in_flight_count - 1);
     if (state.draining && state.in_flight_count === 0) {
@@ -287,6 +308,52 @@ async function handleCommand(event) {
   }
 }
 
+function startExecutorTiming(event) {
+  const receivedAt = new Date();
+  const commandEventAtMs = Date.parse(
+    event?.ingested_at
+    || event?.observed_at
+    || event?.payload?.decision_at
+    || '',
+  );
+  return {
+    received_at: receivedAt.toISOString(),
+    started_at_ms: performance.now(),
+    command_event_age_ms: Number.isFinite(commandEventAtMs)
+      ? roundTimingMs(receivedAt.getTime() - commandEventAtMs)
+      : null,
+  };
+}
+
+function recordExecutorTiming(timing, field, startedAtMs) {
+  if (!timing) return;
+  timing[field] = roundTimingMs(performance.now() - startedAtMs);
+}
+
+function withExecutorTiming(payload, timing) {
+  return {
+    ...payload,
+    executor_timing: finishExecutorTiming(timing),
+  };
+}
+
+function finishExecutorTiming(timing) {
+  if (!timing) return null;
+  return {
+    received_at: timing.received_at,
+    command_event_age_ms: timing.command_event_age_ms,
+    current_salt_ms: timing.current_salt_ms ?? null,
+    sign_ms: timing.sign_ms ?? null,
+    relay_response_ms: timing.relay_response_ms ?? null,
+    executor_total_ms: roundTimingMs(performance.now() - timing.started_at_ms),
+  };
+}
+
+function roundTimingMs(value) {
+  const number = Number(value);
+  return Number.isFinite(number) ? Math.round(number * 1000) / 1000 : null;
+}
+
 async function publishResult(command, extraPayload) {
   const event = buildEventEnvelope({
     source: 'trade-executor',

src/core/operator-dashboard.mjs

@@ -2415,6 +2415,7 @@ function normalizeLiveExecutionResult(payload, event) {
     venue_response: payload.venue_response || null,
     error_message: payload.error?.message || null,
     note: payload.note || null,
+    timing: payload.executor_timing || null,
   };
 }
 

src/lib/postgres.mjs

@@ -3617,6 +3617,7 @@ function normalizeExecutionResultRow(row) {
     venue_response: resultPayload.venue_response || null,
     error_message: resultPayload.error?.message || null,
     note: resultPayload.note || null,
+    timing: resultPayload.executor_timing || null,
   };
 }
 

src/operator-dashboard/static/pages/StrategyPage.jsx

@@ -34,6 +34,29 @@ function formatRelativeAge(value, now) {
   return age === 'Unavailable' ? 'Age unavailable' : `${age} ago`;
 }
 
+function formatTimingMs(value) {
+  const number = Number(value);
+  if (!Number.isFinite(number)) return null;
+  return `${number < 10 ? number.toFixed(1) : number.toFixed(0)} ms`;
+}
+
+function formatExecutionTiming(timing) {
+  if (!timing) return null;
+  const parts = [
+    ['total', timing.executor_total_ms],
+    ['cmd age', timing.command_event_age_ms],
+    ['salt', timing.current_salt_ms],
+    ['sign', timing.sign_ms],
+    ['relay', timing.relay_response_ms],
+  ]
+    .map(([label, value]) => {
+      const formatted = formatTimingMs(value);
+      return formatted ? `${label} ${formatted}` : null;
+    })
+    .filter(Boolean);
+  return parts.length ? `Timing: ${parts.join(', ')}` : null;
+}
+
 function IdentifierRow({ label, value }) {
   if (!value) return <div className="status-subtle">{`${label}: unavailable`}</div>;
 
@@ -112,6 +135,8 @@ function StageCard({ title, at, status, children }) {
 }
 
 function LifecycleDetails({ item }) {
+  const executionTiming = formatExecutionTiming(item.execution?.timing);
+
   return (
     <div className="lifecycle-detail-panel">
       <div className="lifecycle-stage-grid">
@@ -135,6 +160,7 @@ function LifecycleDetails({ item }) {
           <div>{item.execution?.result_code || 'No executor result code stored'}</div>
           {item.execution?.error_message ? <div className="status-subtle">{item.execution.error_message}</div> : null}
           {!item.execution?.error_message && item.execution?.note ? <div className="status-subtle">{item.execution.note}</div> : null}
+          {executionTiming ? <div className="status-subtle">{executionTiming}</div> : null}
           {item.execution?.status === 'submitted' ? (
             <div className="status-subtle">Submitted means the relay accepted the response; it does not prove a trade.</div>
           ) : null}

test/operator-dashboard-ui-static.test.mjs

@@ -29,6 +29,11 @@ test('strategy page owns consolidated quote lifecycle and successful trade table
   assert.match(strategySource, /setDisplayItems\(items \|\| \[\]\)/);
   assert.match(strategySource, /item\.execution\?\.error_message/);
   assert.match(strategySource, /item\.execution\?\.note/);
+  assert.match(strategySource, /formatExecutionTiming/);
+  assert.match(strategySource, /item\.execution\?\.timing/);
+  assert.match(strategySource, /current_salt_ms/);
+  assert.match(strategySource, /relay_response_ms/);
+  assert.match(strategySource, /Timing:/);
   assert.match(strategySource, /item\.execution\?\.status === 'submitted'/);
   assert.match(strategySource, /Submitted means the relay accepted the response; it does not prove a trade\./);
   assert.doesNotMatch(strategySource, /Actionable|actionable/);

test/operator-dashboard.test.mjs

@@ -326,6 +326,13 @@ test('live quote updates stay capped and publish lifecycle rows without refresh'
         pair: config.activePair,
         status: 'submitted',
         result_code: 'quote_response_ok',
+        executor_timing: {
+          command_event_age_ms: 3,
+          current_salt_ms: 42,
+          sign_ms: 1.5,
+          relay_response_ms: 111,
+          executor_total_ms: 157,
+        },
       },
     },
   });
@@ -336,6 +343,13 @@ test('live quote updates stay capped and publish lifecycle rows without refresh'
   assert.ok(submittedUpdates.find((update) => update.type === 'status_bar.updated'));
   assert.equal(submittedLifecycleUpdate.recent_lifecycle_rows[0].quote_id, 'quote-10');
   assert.equal(submittedLifecycleUpdate.recent_lifecycle_rows[0].lifecycle_state, 'submitted');
+  assert.deepEqual(submittedLifecycleUpdate.recent_lifecycle_rows[0].execution.timing, {
+    command_event_age_ms: 3,
+    current_salt_ms: 42,
+    sign_ms: 1.5,
+    relay_response_ms: 111,
+    executor_total_ms: 157,
+  });
   assert.doesNotMatch(
     `${submittedLifecycleUpdate.recent_lifecycle_rows[0].lifecycle_label} ${submittedLifecycleUpdate.recent_lifecycle_rows[0].reason_text}`,
     /completed|successful trade|asset delta/i,

test/trade-executor-static.test.mjs

@@ -25,3 +25,14 @@ test('trade executor exposes summarized durable command state', () => {
   assert.match(source, /stateStore\.getSummary\(\{ limit: 50 \}\)/);
   assert.doesNotMatch(source, /durable_state:\s*stateStore\.getState\(\)/);
 });
+
+test('trade executor records hot path timing in result payloads', () => {
+  assert.match(source, /node:perf_hooks/);
+  assert.match(source, /startExecutorTiming\(event\)/);
+  assert.match(source, /executor_timing/);
+  assert.match(source, /current_salt_ms/);
+  assert.match(source, /sign_ms/);
+  assert.match(source, /relay_response_ms/);
+  assert.match(source, /executor_total_ms/);
+  assert.match(source, /withExecutorTiming\(\{[\s\S]*?result_code: 'submission_failed'/);
+});