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Bug 1178966 - Add FHR probe to measure eyeball time spent on newtab [r=bsmedberg]

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This commit is contained in:
Maxim Zhilyaev 2015-07-08 21:41:10 -07:00
parent 35df9007ee
commit 104990cd70
2 changed files with 39 additions and 1 deletions
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26
browser/base/content/newtab/page.js
View File

@ -164,6 +164,23 @@ let gPage = {
}
},
/**
* Handles unload event
*/
_handleUnloadEvent: function Page_handleUnloadEvent() {
gAllPages.unregister(this);
// compute page life-span and send telemetry probe: using milli-seconds will leave
// many low buckets empty. Instead we use half-second precision to make low end
// of histogram linear and not loose the change in user attention
let delta = Math.round((Date.now() - this._firstVisibleTime) / 500);
if (this._suggestedTilePresent) {
Services.telemetry.getHistogramById("NEWTAB_PAGE_LIFE_SPAN_SUGGESTED").add(delta);
}
else {
Services.telemetry.getHistogramById("NEWTAB_PAGE_LIFE_SPAN").add(delta);
}
},
/**
* Handles all page events.
*/
@ -173,7 +190,7 @@ let gPage = {
this.onPageVisibleAndLoaded();
break;
case "unload":
gAllPages.unregister(this);
this._handleUnloadEvent();
break;
case "click":
let {button, target} = aEvent;
@ -225,6 +242,9 @@ let gPage = {
}
}
// save timestamp to compute page life-span delta
this._firstVisibleTime = Date.now();
if (document.readyState == "complete") {
this.onPageVisibleAndLoaded();
} else {
@ -256,6 +276,10 @@ let gPage = {
if (node.classList && node.classList.contains("newtab-cell")) {
if (sites[++i]) {
lastIndex = i;
if (sites[i].link.targetedSite) {
// record that suggested tile is shown to use suggested-tiles-histogram
this._suggestedTilePresent = true;
}
}
}
}

14
toolkit/components/telemetry/Histograms.json
View File

@ -4781,6 +4781,20 @@
"kind": "boolean",
"description": "New tab page is enhanced (showing suggestions)."
},
"NEWTAB_PAGE_LIFE_SPAN": {
"expires_in_version": "default",
"kind": "exponential",
"high": "1200",
"n_buckets": 100,
"description": "Life-span of a new tab without suggested tile: time delta between first-visible and unload events (half-seconds)."
},
"NEWTAB_PAGE_LIFE_SPAN_SUGGESTED": {
"expires_in_version": "default",
"kind": "exponential",
"high": "1200",
"n_buckets": 100,
"description": "Life-span of a new tab with suggested tile: time delta between first-visible and unload events (half-seconds)."
},
"NEWTAB_PAGE_PINNED_SITES_COUNT": {
"expires_in_version": "default",
"kind": "enumerated",