Index: tools/perf/measurements/page_cycler.py |
diff --git a/tools/perf/measurements/page_cycler.py b/tools/perf/measurements/page_cycler.py |
index 5316986f0522ca5d0e86afcee9897fbc50eb62aa..b774de42a21e6def4949c2568b94fab53cc566a2 100644 |
--- a/tools/perf/measurements/page_cycler.py |
+++ b/tools/perf/measurements/page_cycler.py |
@@ -132,7 +132,13 @@ class PageCycler(page_measurement.PageMeasurement): |
results.AddValue(scalar.ScalarValue( |
results.current_page, '%stimes.page_load_time' % chart_name_prefix, |
- 'ms', tab.EvaluateJavaScript('__pc_load_time'))) |
+ 'ms', tab.EvaluateJavaScript('__pc_load_time'), |
+ description='Average page load time. Measured from ' |
+ 'performance.timing.navigationStart until the completion ' |
+ 'time of a layout after the window.load event. Cold times ' |
+ 'are the times when the page is loaded cold, i.e. without ' |
+ 'loading it before, and warm times are times when the ' |
+ 'page is loaded after being loaded previously.')) |
self._has_loaded_page[page.url] += 1 |