1271913 - "nsInputStreamPump::OnStateStop" spent more time between "domLoading" to "loadEventEnd"

Status: RESOLVED DUPLICATE of bug 1267971

(Core :: General, defect)

Description

[Cynthia Tang [:cynthiatang]]

Test Case
  1. Launch the browser with blank page
  2. Input the google doc url with 1 table content 
     https://goo.gl/W1txdG
  3. Close the browser

Profiler: https://goo.gl/1rehgy 

From Perf Timing json, the "domLoading" to "loadEventEnd" are 424 ~ 7882 ms, diff is 7458 ms. Switch to profiling data, we can only check the Add-on start/end mark. The first "Start" to last "End" marks, time-stamp are 33189 ~ 41375 ms, diff is 8186 ms.

From Gecko Profiling data, the Range [33105, 41343]:
 8111  100.0%  Startup::XRE_Main
 2337   32.4%  ├─ nsHtml5TreeOpExecutor::RunFlushLoop
 2168   26.7%  │  ├─ nsJSUtils::EvaluateString
  137    1.7%  │  ├─ EventDispatcher::Dispatch
               │  └─ ...so on
               │
 1800   22.2%  ├─ nsInputStreamPump::OnInputStreamReady
 1650   20.3%  │  ├─ nsInputStreamPump::OnStateStop
  106    1.3%  │  ├─ nsInputStreamPump::OnStateStart
   44    0.5%  │  └─ nsInputStreamPump::OnStateTransfer
               │
 1127   13.9%  ├─ Timer::Fire
 1102   13.6%  │  ├─ js::RunScript
   14    0.2%  │  ├─ nsCycleCollector::forgetSkippable
               │  └─ ...so on
               │
  624    7.7%  ├─ nsRefreshDriver::Tick
  323    4.0%  │  ├─ PressShell::Paint
  113    1.4%  │  ├─ PressShell::Flush (Flush_Style)
               │  └─ ...so on
               └─ ...so on

Firefox version: 45.0.2
OS version: Ubuntu 14.04 LTS 64-bit