Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!1.eu.feeder.erje.net!newsfeed.datemas.de!weretis.net!feeder1.news.weretis.net!news.solani.org!.POSTED!not-for-mail From: Thomas 'PointedEars' Lahn Newsgroups: comp.lang.javascript Subject: Re: Is it necessary to explicitly destroy elements? Date: Sun, 17 May 2015 08:01:24 +0200 Organization: PointedEars Software (PES) Lines: 44 Message-ID: <1975681.PYLPBkoTqA@PointedEars.de> References: <2602320.PcnAOMWr9L@PointedEars.de> Reply-To: Thomas 'PointedEars' Lahn Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 8Bit X-Trace: solani.org 1431842647 23338 eJwFwQkBwDAIA0BLZDwFOdAR/xJ65xqIeyw8zOlsMLdUwoUo1UU3uWO2dbI+AQd6TTML89sDGecQ1w== (17 May 2015 06:04:07 GMT) X-Complaints-To: abuse@news.solani.org NNTP-Posting-Date: Sun, 17 May 2015 06:04:07 +0000 (UTC) User-Agent: KNode/4.14.2 X-User-ID: eJwFwYEBwDAEBMCVhPgwjuL3H6F3bjjod+G4TqfYc81EyOqUKrLNBqyMiTcx/G7pKnZ8yUKdjxTJzV7r/AFKqRY9 Cancel-Lock: sha1:n5mopxQ0LvyzaEloYugphWi/sRA= X-NNTP-Posting-Host: eJwFwQEBACAIA7BKIueXOCjaP4JbOI1HYBDx4i0dpcQF82Jvb1VWMbfFuI2cc92kVwbgoz8L5BBa Mail-Copies-To: usenet@PointedEars.de Xref: csiph.com comp.lang.javascript:27706 Joao Rodrigues wrote: > Thomas 'PointedEars' Lahn wrote: >> Stefan Ram wrote: >>> - avoid circular references between JavaScript objects and DOM objects >>> - avoid using closure variables in event handlers >>> - avoid using inline event handlers (onclick='f()') >>> - avoid using expando properties >>> - nullify expando properties and DOM references when not needed anymore >> >> The IE memory leak issue has been resolved as of IE 9, so given the >> target environments none of this is necessary anymore. Therefore, the >> programming language to which these measures applied, was JScript, not >> JavaScript, and only the MSHTML DOM, not all DOMs. > > Even though newer versions of modern browsers seem to have solved the > memory leak problems of yore, this issue may arise again because of the > single-page applications, for one, JS animations without properly > clearing timers. That is a separate issue. Yes, one should clear one?s timers. > So, we have one more reason to use CSS animations instead of JS > animations. True, but /non sequitur/. > There is a good article by Addy Osmani teaching how to chase leaks with > Chrome DevTools [2]. > > [2] > profiling-in-devtools/> Your research is lacking depth. This article was published on 2013-04-11, around the time that Chrome 26 was released, which used WebKit as layout engine. The current stable Chrome version is 42 and uses a different layout engine, Blink. -- PointedEars FAQ: | SVN: Twitter: @PointedEars2 | ES Matrix: Please do not cc me. / Bitte keine Kopien per E-Mail.