From 5e07f98fcc6d9efe362fe24d076f1ba8f06d3da1 Mon Sep 17 00:00:00 2001
From: Bastien Caudan <bastien.caudan@gmail.com>
Date: Fri, 4 Jun 2021 18:16:39 +0200
Subject: [PATCH 1/2] enable monitoring for sandbox

---
 sandbox/index.html | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sandbox/index.html b/sandbox/index.html
index cdcc25f199..cb76820951 100644
--- a/sandbox/index.html
+++ b/sandbox/index.html
@@ -9,9 +9,11 @@
       DD_RUM.init({
         clientToken: 'xxx',
         applicationId: 'xxx',
+        internalMonitoringApiKey: 'xxx',
       })
       DD_LOGS.init({
         clientToken: 'xxx',
+        internalMonitoringApiKey: 'xxx',
       })
     </script>
   </head>

From 6667ae79de447e7aa1afa368622fd7c669b72136 Mon Sep 17 00:00:00 2001
From: Bastien Caudan <bastien.caudan@gmail.com>
Date: Fri, 4 Jun 2021 18:17:17 +0200
Subject: [PATCH 2/2] monitor high lcp, fcp, resource.duration values

---
 packages/core/src/tools/utils.ts              |  1 +
 .../resource/resourceUtils.ts                 | 17 ++++++++++
 .../view/trackInitialViewTimings.ts           | 31 ++++++++++++++++++-
 3 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/tools/utils.ts b/packages/core/src/tools/utils.ts
index 8a0f78c8e4..6f5d72cc73 100644
--- a/packages/core/src/tools/utils.ts
+++ b/packages/core/src/tools/utils.ts
@@ -3,6 +3,7 @@ import { monitor } from '../domain/internalMonitoring'
 export const ONE_SECOND = 1000
 export const ONE_MINUTE = 60 * ONE_SECOND
 export const ONE_HOUR = 60 * ONE_MINUTE
+export const ONE_DAY = 24 * ONE_HOUR
 export const ONE_KILO_BYTE = 1024
 
 export const enum DOM_EVENT {
diff --git a/packages/rum-core/src/domain/rumEventsCollection/resource/resourceUtils.ts b/packages/rum-core/src/domain/rumEventsCollection/resource/resourceUtils.ts
index 10ae559604..de66f67aad 100644
--- a/packages/rum-core/src/domain/rumEventsCollection/resource/resourceUtils.ts
+++ b/packages/rum-core/src/domain/rumEventsCollection/resource/resourceUtils.ts
@@ -9,6 +9,9 @@ import {
   ResourceType,
   ServerDuration,
   toServerDuration,
+  ONE_DAY,
+  relativeNow,
+  timeStampNow,
 } from '@datadog/browser-core'
 import { RumPerformanceResourceTiming } from '../../../browser/performanceCollection'
 
@@ -82,6 +85,20 @@ export function computePerformanceResourceDuration(entry: RumPerformanceResource
     return toServerDuration(elapsed(startTime, responseEnd))
   }
 
+  if (duration > ONE_DAY) {
+    addMonitoringMessage('resource duration > 1 day', {
+      debug: {
+        type: entry.initiatorType,
+        name: entry.name,
+        startTime: Math.round(startTime),
+        responseEnd: Math.round(responseEnd),
+        duration: Math.round(duration),
+        relativeNow: Math.round(relativeNow()),
+        timeStampNow: timeStampNow(),
+      },
+    })
+  }
+
   return toServerDuration(duration)
 }
 
diff --git a/packages/rum-core/src/domain/rumEventsCollection/view/trackInitialViewTimings.ts b/packages/rum-core/src/domain/rumEventsCollection/view/trackInitialViewTimings.ts
index 1a640ab807..16e37da771 100644
--- a/packages/rum-core/src/domain/rumEventsCollection/view/trackInitialViewTimings.ts
+++ b/packages/rum-core/src/domain/rumEventsCollection/view/trackInitialViewTimings.ts
@@ -1,4 +1,15 @@
-import { addEventListeners, DOM_EVENT, Duration, elapsed, EventEmitter, RelativeTime } from '@datadog/browser-core'
+import {
+  addEventListeners,
+  DOM_EVENT,
+  Duration,
+  elapsed,
+  EventEmitter,
+  RelativeTime,
+  ONE_DAY,
+  addMonitoringMessage,
+  relativeNow,
+  timeStampNow,
+} from '@datadog/browser-core'
 import { LifeCycle, LifeCycleEventType } from '../../lifeCycle'
 import { trackFirstHidden } from './trackFirstHidden'
 
@@ -69,6 +80,15 @@ export function trackFirstContentfulPaint(lifeCycle: LifeCycle, callback: (fcp:
       entry.name === 'first-contentful-paint' &&
       entry.startTime < firstHidden.timeStamp
     ) {
+      if (entry.startTime > ONE_DAY) {
+        addMonitoringMessage('FCP > 1 day', {
+          debug: {
+            fcp: Math.round(entry.startTime),
+            relativeNow: Math.round(relativeNow()),
+            timeStampNow: timeStampNow(),
+          },
+        })
+      }
       callback(entry.startTime)
     }
   })
@@ -109,6 +129,15 @@ export function trackLargestContentfulPaint(
         entry.startTime < firstInteractionTimestamp &&
         entry.startTime < firstHidden.timeStamp
       ) {
+        if (entry.startTime > ONE_DAY) {
+          addMonitoringMessage('LCP > 1 day', {
+            debug: {
+              lcp: Math.round(entry.startTime),
+              relativeNow: Math.round(relativeNow()),
+              timeStampNow: timeStampNow(),
+            },
+          })
+        }
         callback(entry.startTime)
       }
     }