telemetry(amazonq inline): perceivedLatency calculated incorrectly

packages/core/src/codewhisperer/service/inlineCompletionItemProvider.ts

@@ -169,6 +169,7 @@ export class CWInlineCompletionItemProvider implements vscode.InlineCompletionIt
             ImportAdderProvider.instance.onShowRecommendation(document, this.startPos.line, r)
             this.nextMove = 0
             TelemetryHelper.instance.setFirstSuggestionShowTime()
+            session.setPerceivedLatency()
             this._onDidShow.fire()
             if (matchedCount >= 2 || this.nextToken !== '') {
                 const result = [item]

packages/core/src/codewhisperer/util/codeWhispererSession.ts

@@ -43,6 +43,7 @@ class CodeWhispererSession {
     invokeSuggestionStartTime = 0
     timeToFirstRecommendation = 0
     firstSuggestionShowTime = 0
+    perceivedLatency = 0
 
     public static get instance() {
         return (this.#instance ??= new CodeWhispererSession())
@@ -91,6 +92,17 @@ class CodeWhispererSession {
         }
     }
 
+    setPerceivedLatency() {
+        if (this.perceivedLatency !== 0) {
+            return
+        }
+        if (this.triggerType === 'OnDemand') {
+            this.perceivedLatency = this.timeToFirstRecommendation
+        } else {
+            this.perceivedLatency = this.firstSuggestionShowTime - vsCodeState.lastUserModificationTime
+        }
+    }
+
     reset() {
         this.sessionId = ''
         this.requestContext = { request: {} as any, supplementalMetadata: {} as any }

packages/core/src/codewhisperer/util/telemetryHelper.ts

@@ -325,9 +325,7 @@ export class TelemetryHelper {
                         suggestionState: this.getSendTelemetrySuggestionState(aggregatedSuggestionState),
                         recommendationLatencyMilliseconds: e2eLatency,
                         triggerToResponseLatencyMilliseconds: session.timeToFirstRecommendation,
-                        perceivedLatencyMilliseconds: session.getPerceivedLatency(
-                            this.sessionDecisions[0].codewhispererTriggerType
-                        ),
+                        perceivedLatencyMilliseconds: session.perceivedLatency,
                         timestamp: new Date(Date.now()),
                         suggestionReferenceCount: referenceCount,
                         generatedLine: generatedLines,
@@ -388,6 +386,7 @@ export class TelemetryHelper {
         this.typeAheadLength = 0
         this.timeSinceLastModification = 0
         session.timeToFirstRecommendation = 0
+        session.perceivedLatency = 0
         this.classifierResult = undefined
         this.classifierThreshold = undefined
     }