From 17060ce138e75fd2716ea98fa5a497df8c753755 Mon Sep 17 00:00:00 2001
From: Bucky Schwarz <d.w.schwarz@gmail.com>
Date: Tue, 4 Aug 2020 09:48:14 -0700
Subject: [PATCH] chore: remove rum poc

---
 ui/src/cloud/utils/rum.ts | 113 --------------------------------------
 ui/src/index.tsx          |   5 --
 2 files changed, 118 deletions(-)
 delete mode 100644 ui/src/cloud/utils/rum.ts

diff --git a/ui/src/cloud/utils/rum.ts b/ui/src/cloud/utils/rum.ts
deleted file mode 100644
index 313ff60edc..0000000000
--- a/ui/src/cloud/utils/rum.ts
+++ /dev/null
@@ -1,113 +0,0 @@
-// RUM - Real User Monitoring
-// Uses the Navigation timing API to calculate the performance of our system
-
-import {getFlags} from 'src/client'
-import {reportError} from 'src/shared/utils/errors'
-import {reportPoints} from 'src/cloud/apis/reporting'
-
-export interface Tags {
-  [key: string]: string
-}
-
-export interface Fields {
-  [key: string]: number | string
-}
-
-// See https://www.w3.org/TR/navigation-timing/timing-overview.png
-export const buildFieldsFromTiming = function buildFieldsFromTiming(
-  timing: PerformanceNavigationTiming
-): Fields {
-  // These are counted from the start of the request, hence no maths
-  const ttfb = timing.responseStart
-  const pageLoad = timing.loadEventStart
-  const domInteractive = timing.domInteractive
-
-  const redirect = timing.redirectEnd - timing.redirectStart
-
-  // Networking
-  const pageDownload = timing.responseEnd - timing.fetchStart
-  const latency = timing.responseStart - timing.fetchStart
-  const dns = timing.domainLookupEnd - timing.domainLookupStart
-
-  // Server measurements
-  const serverConnect = timing.connectEnd - timing.connectStart
-  const serverResponse = timing.responseStart - timing.requestStart
-  const totalServer = timing.responseEnd - timing.requestStart
-
-  //  UI measurements
-  let domProcessing = timing.responseEnd
-  let domContentLoading = timing.domInteractive
-  let windowLoadEvent = timing.loadEventStart
-
-  // these values will be 0 if the event hasn't fired (e.g. because it's not finished) before the request is sent
-  if (timing.domComplete > 0) {
-    domProcessing = timing.domComplete - timing.responseEnd
-  }
-  if (timing.domComplete > 0) {
-    domContentLoading = timing.domComplete - timing.domInteractive
-  }
-  if (windowLoadEvent > 0) {
-    windowLoadEvent = timing.loadEventEnd - timing.loadEventStart
-  }
-
-  // tls and worker may not be set by the user agent - guard against that
-  let tls = 0
-  if (timing.secureConnectionStart > 0) {
-    tls = timing.connectEnd - timing.secureConnectionStart
-  }
-
-  let worker = 0
-  if (timing.workerStart > 0) {
-    worker = timing.responseEnd - timing.workerStart
-  }
-
-  return {
-    dns,
-    domContentLoading,
-    domInteractive,
-    domProcessing,
-    latency,
-    pageDownload,
-    pageLoad,
-    redirect,
-    serverConnect,
-    serverResponse,
-    tls,
-    totalServer,
-    ttfb,
-    windowLoadEvent,
-    worker,
-  }
-}
-
-export const writeNavigationTimingMetrics = async function writeNavigationTimingMetrics() {
-  let flags
-  try {
-    // see flags.yml. This should always be false in OSS contexts
-    const resp = await getFlags({})
-    if (resp.status >= 300) {
-      return
-    }
-    flags = resp.data
-  } catch (error) {
-    reportError(error, {name: 'navigation timing metrics: failed to get flags'})
-    return
-  }
-
-  if (flags.appMetrics) {
-    const measurement = 'rum'
-    const tags: Tags = {
-      pathname:
-        window.location.pathname.replace(/[a-z0-9]{16}\/?/gi, '') ||
-        window.location.pathname,
-    }
-    const navigationTiming = performance.getEntriesByType(
-      'navigation'
-    )[0] as PerformanceNavigationTiming
-    const fields = buildFieldsFromTiming(navigationTiming)
-
-    const points = {points: [{measurement, tags, fields}]}
-
-    reportPoints(points)
-  }
-}
diff --git a/ui/src/index.tsx b/ui/src/index.tsx
index ba1dc76847..8b4a0bb7cc 100644
--- a/ui/src/index.tsx
+++ b/ui/src/index.tsx
@@ -19,7 +19,6 @@ import NotFound from 'src/shared/components/NotFound'
 import GetLinks from 'src/shared/containers/GetLinks'
 
 // Utilities
-import {writeNavigationTimingMetrics} from 'src/cloud/utils/rum'
 import {getRootNode} from 'src/utils/nodes'
 import {updateReportingContext} from 'src/cloud/utils/reporting'
 
@@ -87,7 +86,3 @@ class Root extends PureComponent {
 if (rootNode) {
   render(<Root />, rootNode)
 }
-
-window.addEventListener('load', () => {
-  writeNavigationTimingMetrics()
-})