Bug 1301104 - Add tab spinner interstitial probe with a higher ceiling to...

Bug 1301104 - Add tab spinner interstitial probe with a higher ceiling to better measure degenerate cases on a CLOSED TREE. r=billm,chutten,liuche, a=lizzard

MozReview-Commit-ID: 2XzfXDqoB

--HG--
extra : source : c8096f896f7cf570dd77b503861650847337febc
extra : intermediate-source : 3cbdde40fc56b4eb663ec6a2ac434da523cbef8a

browser/base/content/tabbrowser.xml

@@ -3783,6 +3783,9 @@
             spinnerDisplayed: function () {
               this.assert(!this.spinnerTab);
               TelemetryStopwatch.start("FX_TAB_SWITCH_SPINNER_VISIBLE_MS", window);
+              // We have a second, similar probe for capturing recordings of
+              // when the spinner is displayed for very long periods.
+              TelemetryStopwatch.start("FX_TAB_SWITCH_SPINNER_VISIBLE_LONG_MS", window);
               this.addMarker("AsyncTabSwitch:SpinnerShown");
             },
 
@@ -3791,6 +3794,7 @@
               this.log("DEBUG: spinner time = " +
                        TelemetryStopwatch.timeElapsed("FX_TAB_SWITCH_SPINNER_VISIBLE_MS", window));
               TelemetryStopwatch.finish("FX_TAB_SWITCH_SPINNER_VISIBLE_MS", window);
+              TelemetryStopwatch.finish("FX_TAB_SWITCH_SPINNER_VISIBLE_LONG_MS", window);
               this.addMarker("AsyncTabSwitch:SpinnerHidden");
               // we do not get a onPaint after displaying the spinner
               this.maybeFinishTabSwitch();

toolkit/components/telemetry/Histograms.json

@@ -4346,6 +4346,16 @@
     "n_buckets": 20,
     "description": "Firefox: If the spinner interstitial displays during tab switching, records the time in ms the graphic is visible"
   },
+  "FX_TAB_SWITCH_SPINNER_VISIBLE_LONG_MS": {
+    "expires_in_version": "54",
+    "kind": "exponential",
+    "low": 1000,
+    "high": 64000,
+    "n_buckets": 7,
+    "bug_numbers": [1301104],
+    "alert_emails": ["mconley@mozilla.com"],
+    "description": "Firefox: If the spinner interstitial displays during tab switching, records the time in ms the graphic is visible. This probe is similar to FX_TAB_SWITCH_SPINNER_VISIBLE_MS, but is for truly degenerate cases."
+  },
   "FX_TAB_CLICK_MS": {
     "expires_in_version": "default",
     "kind": "exponential",