From 4ddaa76a687d19631c313d903c4e3a883bc57980 Mon Sep 17 00:00:00 2001
From: k-fish <kevan.fisher@sentry.io>
Date: Mon, 17 Jul 2023 11:42:51 -0400
Subject: [PATCH] Normalize timings

---
 .../tracing-internal/src/browser/request.ts   | 24 +++++++++++--------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/packages/tracing-internal/src/browser/request.ts b/packages/tracing-internal/src/browser/request.ts
index 28efe77d4b99..3407c33a8f2a 100644
--- a/packages/tracing-internal/src/browser/request.ts
+++ b/packages/tracing-internal/src/browser/request.ts
@@ -182,6 +182,10 @@ function addHTTPTimings(span: Span): void {
   });
 }
 
+function getAbsoluteTime(time: number): number {
+  return ((browserPerformanceTimeOrigin || performance.timeOrigin) + time) / 1000;
+}
+
 function resourceTimingEntryToSpanData(resourceTiming: PerformanceResourceTiming): [string, string | number][] {
   const version = resourceTiming.nextHopProtocol.split('/')[1] || 'none';
 
@@ -195,16 +199,16 @@ function resourceTimingEntryToSpanData(resourceTiming: PerformanceResourceTiming
   }
   return [
     ...timingSpanData,
-    ['http.request.redirect_start', resourceTiming.redirectStart],
-    ['http.request.fetch_start', resourceTiming.fetchStart],
-    ['http.request.domain_lookup_start', resourceTiming.domainLookupStart],
-    ['http.request.domain_lookup_end', resourceTiming.domainLookupEnd],
-    ['http.request.connect_start', resourceTiming.connectStart],
-    ['http.request.secure_connection_start', resourceTiming.secureConnectionStart],
-    ['http.request.connection_end', resourceTiming.connectEnd],
-    ['http.request.request_start', resourceTiming.requestStart],
-    ['http.request.response_start', resourceTiming.responseStart],
-    ['http.request.response_end', resourceTiming.responseEnd],
+    ['http.request.redirect_start', getAbsoluteTime(resourceTiming.redirectStart)],
+    ['http.request.fetch_start', getAbsoluteTime(resourceTiming.fetchStart)],
+    ['http.request.domain_lookup_start', getAbsoluteTime(resourceTiming.domainLookupStart)],
+    ['http.request.domain_lookup_end', getAbsoluteTime(resourceTiming.domainLookupEnd)],
+    ['http.request.connect_start', getAbsoluteTime(resourceTiming.connectStart)],
+    ['http.request.secure_connection_start', getAbsoluteTime(resourceTiming.secureConnectionStart)],
+    ['http.request.connection_end', getAbsoluteTime(resourceTiming.connectEnd)],
+    ['http.request.request_start', getAbsoluteTime(resourceTiming.requestStart)],
+    ['http.request.response_start', getAbsoluteTime(resourceTiming.responseStart)],
+    ['http.request.response_end', getAbsoluteTime(resourceTiming.responseEnd)],
   ];
 }