Open Bug 971301 Opened 6 years ago Updated Last year

Investigate console logging expenses


(Firefox for Android :: General, defect)

Not set




(Reporter: rnewman, Unassigned)


(Depends on 1 open bug, Blocks 1 open bug)


(Keywords: perf)

Nick and I have a sneaking suspicion that calls to Log.* and isLoggable are having an impact on our overall perf. It is, after all, I/O -- and a lot of it. And a lot of string concatenation, allocation, and GC, too.

We should:

* Measure
* Switch to Logger (which is more efficient) or remove log statements
* Consider the use of selective preprocessing or Proguarding to eliminate the argument-compilation costs of disabled logging.

Furthermore, I think that initializing for a console.log statement in browser.js is causing ConsoleAPI.init to have a measurable impact on our startup profile. This is called from

  HealthReportStatusListener.init() @ browser.js:5529
  pbu_privacyContextFromWindow() @ PrivateBrowsingUtils.jsm:23
  AppUtils.jsm (via Webapps*)

We should strip out unnecessary logging from browser.js and its dependent modules so that we can delay initialization of the console API.
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