[Seasar-user:21835] Re: kumu.jsについで

[周 偉明]

米林さん

Thank you for your reply.

I got it!

Thank you very much.

Best Regards,

2014-03-14 00:25:48 (+09:00) Masaaki Yonebayashi <yone at abby.co.jp> wrote
> 周さん
> 米林です。
> 
> kumu.js is old  javascript library, which was used long time ago.
> It support old browsers.
> 
> Try to do in the following manner.
> Unzip the jar file, should be abolished prototype extensions to modify the
> kumu.js.
> And should be placed in the WEB-INF/lib create a jar file, including the
> kumu.js the modified.
> 
> 
> 
> 2014-03-13 10:53 GMT+09:00 周 偉明 <zhou_w at worksap.co.jp>:
> 
> > 米林さん、
> >
> > Thank you for you reply!
> >
> > I'm using a bunch of JavaScript libraries, most notably jQuery UI tabs
> > https://jqueryui.com/tabs/ version 1.9.2.
> > When the number of tabs gets large, the performance degrades dramatically
> > in IE7/IE8. Another library has
> > similar performance degradation is jqgrid http://www.trirand.com/blog/version 4.4.3.
> >
> > As a result of investigation, these libraries rely heavily on
> > Array.unshift, which is overridden by kumu.js with
> > its own implementation. Saving it and restoring later after kumu.js can be
> > a workaround:
> >
> > <script type="text/javascript">
> > var originalUnshift = Array.unshift;
> > </script>
> > <script type="text/javascript"
> >  src="/teedaExtension/org/seasar/teeda/ajax/js/kumu.js"></script>
> > <script>
> > Array.prototype.unshift = originalUnshift;
> > </script>
> >
> > With this trick, I got almost 5x speed up in IE7/IE8. But there are many
> > places in my project have kumu.js linked,
> > so I have to apply this trick everywhere and it's really troublesome.
> >
> > This kind of performance penalty happens in real IE7/IE8, but not in the
> > IE7/IE8 simulated mode of IE9+,
> > nor in modern browsers such as Chrome/Firefox. That's probably because
> > that the JavaScript engine of modern
> > browsers are no optimized that the additional performance overhead caused
> > by overridden Array.unshift is not
> > sensible.
> >
> > Generally I think replacing the built-in methods provided by the browsers
> > is not a good idea.
> >
> > Any advice or suggestion will be greatly appreciated.
> >
> > Best Regards,
> >
> >
> >
> > 2014-03-13 06:30:31 (+09:00) Masaaki Yonebayashi <yone at abby.co.jp> wrote
> > > 米林です。
> > >
> > > What specific process do you do when the performance desgrade?
> > >
> > > 2014年2月19日水曜日、周 偉明<zhou_w at worksap.co.jp>さんは書きました:
> > >
> > > > お世話になっています。
> > > > 周と申します。
> > > >
> > > > kumu.js is overriding the prototype of array:
> > > >
> > > > Array.prototype = Kumu.extend(Array.prototype, {
> > > >   map:Kumu.map,
> > > >   filter:Kumu.filter,
> > > >   shift:Kumu.shift,
> > > >   unshift:Kumu.unshift,
> > > >   include:Kumu.include
> > > >
> > > > });
> > > >
> > > > which is causing serious performance problems in JavaScript heavy page
> > in
> > > > IE7,8.
> > > >
> > > > What's the reason? If kumu.js is trying to deal with legacy browsers
> > > > without
> > > > all these methods provided, at least it should the existence of the
> > methods
> > > > before overriding them.
> > > >
> > > > Any advice or suggestion will be greatly appreciated.
> > > >
> > > > Best Regards,
> > > >
> > > > _______________________________________________
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> > > >
> > >
> > >
> > > --
> > > 米 林   正 明
> > > 株式会社Abby(エビイ)
> > > http://abby.co.jp
> > _______________________________________________
> > Seasar-user mailing list
> > Seasar-user at ml.seasar.org
> > https://ml.seasar.org/mailman/listinfo/seasar-user
> >
> 
> 
> 
> -- 
> 米 林   正 明
> 株式会社Abby(エビイ)
> http://abby.co.jp