Re: Exception reporting is broken in GWT: would you support a kickstarter project to fix it?

2013-05-24 Thread Thomas Broyer


On Thursday, May 23, 2013 11:11:22 PM UTC+2, Alex Epshteyn wrote:

 Hi Thomas,

 Thanks for chiming in and providing the extra info.  Good to know.

 I'd like to ask, however, the reasons for planning to remove support for 
 IE6/7/8?  Why would we do that?  It's already there and doesn't require too 
 much maintenance.


Have a look at the I/O talk: http://youtu.be/Ul-LbfkJ-tw?t=10m20s
 

 As of today, nearly 8% of my site's visitors are on IE8 and close to 1% 
 are still on IE7.  These are pretty big numbers for a high traffic website, 
 and would translate into lost revenue if the browsers weren't supported.  I 
 can't imagine Google pulling support for a browser with that kind of usage 
 for one of its products. .  Here's the full data: 
 https://docs.google.com/spreadsheet/ccc?key=0AvMlWdpkpAA6dGdpa3lsZTVQWl9qcFJrWmZCZ0ZZb0E#gid=0

 Also, as you guys can see from the data, stack emulation is still required 
 for 54% of my site's traffic.

 While I'd like to see users upgrading to the latest browsers as much as 
 any developer, let's be realistic: WinXP is not going away any time soon 
 (Microsoft dropping support for it isn't going to make people like my dad 
 go out and buy a new computer).  Google Analytics is shows that 80% of my 
 users are on Windows and 21% of those are still on Windows XP: that is a 
 very big number!


There are many other browsers available on Windows XP, and you should tell 
your dad that by continuing using an unsupported browser, his computer is 
at risk.
See 
also 
http://www.troyhunt.com/2013/01/the-impending-crisis-that-is-windows-xp.html

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Re: Exception reporting is broken in GWT: would you support a kickstarter project to fix it?

2013-05-24 Thread Jens


 There are many other browsers available on Windows XP, and you should tell 
 your dad that by continuing using an unsupported browser, his computer is 
 at risk.
 See also 
 http://www.troyhunt.com/2013/01/the-impending-crisis-that-is-windows-xp.html


Hehe, I like the IE7 tax idea mentioned on that site :) 

-- J.

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Re: Exception reporting is broken in GWT: would you support a kickstarter project to fix it?

2013-05-23 Thread Thomas Broyer


On Wednesday, May 22, 2013 11:53:47 PM UTC+2, Alex Epshteyn wrote:

 Thanks for your comment.  Let me respond to your points:

 1) I've seen this point discussed before, and the standard 
 counter-argument is that the spirit of OSS is free as in freedom, not 
 beer.  Lots of developers get paid to work on OSS projects.

 2) This is actually one of the reasons I'm thinking about raising funds. 
  I am already on the verge of using my patch inside my own GWT-based app, 
 but if I get some funding I'd be able to justify taking the extra time to 
 make sure the patch will pass the review process.


+1 to those 2 points.
 

 3) I must point out that your third argument is not in the spirit of GWT, 
 which aims to support as many browsers as possible.


That's not entirely true. GWT only ever supported the 4 major browser 
engines: Trident (IE), WebKit (SquirrelFish / V8; aka Safari / Chromium), 
Gecko (Firefox) and Presto (Opera).

Jens is right: we'll soon remove support for IE6 and 7, and then for IE8 
(not long after MS drops support for WinXP).
GWT never really supported Opera, and the level of support was only 
against the latest version. Now that Opera is moving from Presto to 
Chromium, that means one less platform to support in the very near future 
(by the next GWT release, but we'll probably keep the opera permutation 
along for one more release).

As of today, you will not get good stack traces with GWT on any modern 
 browser, including WebKit.  By relevant information, I assume you mean 
 sourcemaps support.  Well, Chrome is the only browser that currently 
 supports sourcemaps but GWT's existing support for generating stack traces 
 with that information is very buggy, and this is one of the things I'm 
 working on improving.  I'm also not optimistic that sourcemaps will achieve 
 universal support any time soon, if ever.


Chromium has it for a while (hence Chrome –all platforms–, Opera for 
Android –though what matters is the remote debugger, not the browser– and 
Opera.next), and Firefox is starting to roll it out [1,2] in 23 (currently 
Aurora channel) and I'm told the next Safari should have it too [3].
Will IE ever have it? I believe so, particularly now that MS is pushing 
languages that compile to JS (TypeScript, which can generate sourcemaps). 
Obviously that would only be available in IE11 (or later), but it seems 
like it would be possible to have support in your IDE with the help of an 
IE plugin [4] for IE8/9/10 (would it work in Windows 8 though?)

That said, source maps support in the browser is related to, but different 
from stack trace resymbolization.

[1] 
https://hacks.mozilla.org/2013/05/firefox-developer-tool-features-for-firefox-23/
[2] 
https://hacks.mozilla.org/2013/05/compiling-to-javascript-and-debugging-with-source-maps/
[3] 
http://stackoverflow.com/questions/16446114/is-it-possible-to-enable-javascript-source-maps-in-safari-6
[4] http://wiki.eclipse.org/JSDT/Debug/IE

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Re: Exception reporting is broken in GWT: would you support a kickstarter project to fix it?

2013-05-23 Thread Alex Epshteyn
Hi Thomas,

Thanks for chiming in and providing the extra info.  Good to know.

I'd like to ask, however, the reasons for planning to remove support for
IE6/7/8?  Why would we do that?  It's already there and doesn't require too
much maintenance.

As of today, nearly 8% of my site's visitors are on IE8 and close to 1% are
still on IE7.  These are pretty big numbers for a high traffic website, and
would translate into lost revenue if the browsers weren't supported.  I
can't imagine Google pulling support for a browser with that kind of usage
for one of its products. .  Here's the full data:
https://docs.google.com/spreadsheet/ccc?key=0AvMlWdpkpAA6dGdpa3lsZTVQWl9qcFJrWmZCZ0ZZb0E#gid=0

Also, as you guys can see from the data, stack emulation is still required
for 54% of my site's traffic.

While I'd like to see users upgrading to the latest browsers as much as any
developer, let's be realistic: WinXP is not going away any time soon
(Microsoft dropping support for it isn't going to make people like my dad
go out and buy a new computer).  Google Analytics is shows that 80% of my
users are on Windows and 21% of those are still on Windows XP: that is a
very big number!



On Thu, May 23, 2013 at 5:13 AM, Thomas Broyer t.bro...@gmail.com wrote:



 On Wednesday, May 22, 2013 11:53:47 PM UTC+2, Alex Epshteyn wrote:

 Thanks for your comment.  Let me respond to your points:

 1) I've seen this point discussed before, and the standard
 counter-argument is that the spirit of OSS is free as in freedom, not
 beer.  Lots of developers get paid to work on OSS projects.

 2) This is actually one of the reasons I'm thinking about raising funds.
  I am already on the verge of using my patch inside my own GWT-based app,
 but if I get some funding I'd be able to justify taking the extra time to
 make sure the patch will pass the review process.


 +1 to those 2 points.


  3) I must point out that your third argument is not in the spirit of
 GWT, which aims to support as many browsers as possible.


 That's not entirely true. GWT only ever supported the 4 major browser
 engines: Trident (IE), WebKit (SquirrelFish / V8; aka Safari / Chromium),
 Gecko (Firefox) and Presto (Opera).

 Jens is right: we'll soon remove support for IE6 and 7, and then for IE8
 (not long after MS drops support for WinXP).
 GWT never really supported Opera, and the level of support was only
 against the latest version. Now that Opera is moving from Presto to
 Chromium, that means one less platform to support in the very near future
 (by the next GWT release, but we'll probably keep the opera permutation
 along for one more release).

 As of today, you will not get good stack traces with GWT on any modern
 browser, including WebKit.  By relevant information, I assume you mean
 sourcemaps support.  Well, Chrome is the only browser that currently
 supports sourcemaps but GWT's existing support for generating stack traces
 with that information is very buggy, and this is one of the things I'm
 working on improving.  I'm also not optimistic that sourcemaps will achieve
 universal support any time soon, if ever.


 Chromium has it for a while (hence Chrome –all platforms–, Opera for
 Android –though what matters is the remote debugger, not the browser– and
 Opera.next), and Firefox is starting to roll it out [1,2] in 23 (currently
 Aurora channel) and I'm told the next Safari should have it too [3].
 Will IE ever have it? I believe so, particularly now that MS is pushing
 languages that compile to JS (TypeScript, which can generate sourcemaps).
 Obviously that would only be available in IE11 (or later), but it seems
 like it would be possible to have support in your IDE with the help of an
 IE plugin [4] for IE8/9/10 (would it work in Windows 8 though?)

 That said, source maps support in the browser is related to, but different
 from stack trace resymbolization.

 [1]
 https://hacks.mozilla.org/2013/05/firefox-developer-tool-features-for-firefox-23/
 [2]
 https://hacks.mozilla.org/2013/05/compiling-to-javascript-and-debugging-with-source-maps/
 [3]
 http://stackoverflow.com/questions/16446114/is-it-possible-to-enable-javascript-source-maps-in-safari-6
 [4] http://wiki.eclipse.org/JSDT/Debug/IE

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Re: Exception reporting is broken in GWT: would you support a kickstarter project to fix it?

2013-05-23 Thread Juan Pablo Gardella
I agree on do not remove IE7 and IE8. A lot of user still using them.


2013/5/23 Alex Epshteyn alexander.epsht...@gmail.com

 Hi Thomas,

 Thanks for chiming in and providing the extra info.  Good to know.

 I'd like to ask, however, the reasons for planning to remove support for
 IE6/7/8?  Why would we do that?  It's already there and doesn't require too
 much maintenance.

 As of today, nearly 8% of my site's visitors are on IE8 and close to 1%
 are still on IE7.  These are pretty big numbers for a high traffic website,
 and would translate into lost revenue if the browsers weren't supported.  I
 can't imagine Google pulling support for a browser with that kind of usage
 for one of its products. .  Here's the full data:
 https://docs.google.com/spreadsheet/ccc?key=0AvMlWdpkpAA6dGdpa3lsZTVQWl9qcFJrWmZCZ0ZZb0E#gid=0

 Also, as you guys can see from the data, stack emulation is still required
 for 54% of my site's traffic.

 While I'd like to see users upgrading to the latest browsers as much as
 any developer, let's be realistic: WinXP is not going away any time soon
 (Microsoft dropping support for it isn't going to make people like my dad
 go out and buy a new computer).  Google Analytics is shows that 80% of my
 users are on Windows and 21% of those are still on Windows XP: that is a
 very big number!



 On Thu, May 23, 2013 at 5:13 AM, Thomas Broyer t.bro...@gmail.com wrote:



 On Wednesday, May 22, 2013 11:53:47 PM UTC+2, Alex Epshteyn wrote:

 Thanks for your comment.  Let me respond to your points:

 1) I've seen this point discussed before, and the standard
 counter-argument is that the spirit of OSS is free as in freedom, not
 beer.  Lots of developers get paid to work on OSS projects.

 2) This is actually one of the reasons I'm thinking about raising funds.
  I am already on the verge of using my patch inside my own GWT-based app,
 but if I get some funding I'd be able to justify taking the extra time to
 make sure the patch will pass the review process.


 +1 to those 2 points.


  3) I must point out that your third argument is not in the spirit of
 GWT, which aims to support as many browsers as possible.


 That's not entirely true. GWT only ever supported the 4 major browser
 engines: Trident (IE), WebKit (SquirrelFish / V8; aka Safari / Chromium),
 Gecko (Firefox) and Presto (Opera).

 Jens is right: we'll soon remove support for IE6 and 7, and then for IE8
 (not long after MS drops support for WinXP).
 GWT never really supported Opera, and the level of support was only
 against the latest version. Now that Opera is moving from Presto to
 Chromium, that means one less platform to support in the very near future
 (by the next GWT release, but we'll probably keep the opera permutation
 along for one more release).

 As of today, you will not get good stack traces with GWT on any modern
 browser, including WebKit.  By relevant information, I assume you mean
 sourcemaps support.  Well, Chrome is the only browser that currently
 supports sourcemaps but GWT's existing support for generating stack traces
 with that information is very buggy, and this is one of the things I'm
 working on improving.  I'm also not optimistic that sourcemaps will achieve
 universal support any time soon, if ever.


 Chromium has it for a while (hence Chrome –all platforms–, Opera for
 Android –though what matters is the remote debugger, not the browser– and
 Opera.next), and Firefox is starting to roll it out [1,2] in 23 (currently
 Aurora channel) and I'm told the next Safari should have it too [3].
 Will IE ever have it? I believe so, particularly now that MS is pushing
 languages that compile to JS (TypeScript, which can generate sourcemaps).
 Obviously that would only be available in IE11 (or later), but it seems
 like it would be possible to have support in your IDE with the help of an
 IE plugin [4] for IE8/9/10 (would it work in Windows 8 though?)

 That said, source maps support in the browser is related to, but
 different from stack trace resymbolization.

 [1]
 https://hacks.mozilla.org/2013/05/firefox-developer-tool-features-for-firefox-23/
 [2]
 https://hacks.mozilla.org/2013/05/compiling-to-javascript-and-debugging-with-source-maps/
 [3]
 http://stackoverflow.com/questions/16446114/is-it-possible-to-enable-javascript-source-maps-in-safari-6
 [4] http://wiki.eclipse.org/JSDT/Debug/IE

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Re: Exception reporting is broken in GWT: would you support a kickstarter project to fix it?

2013-05-23 Thread Jens


 I'd like to ask, however, the reasons for planning to remove support for 
 IE6/7/8?  Why would we do that?  


To simplify the code base and moving on (HTML 5) I would say. 

JQuery for example already did that transition. JQuery 2.0 does not support 
IE6-8 anymore but they still maintain JQuery 1.9.x for people that still 
need IE6-8 browser support. In terms of GWT you can still use the last 
version that supports IE6-8 and then decide yourself when its time to move 
to a newer GWT version for your site.

-- J.

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Re: Exception reporting is broken in GWT: would you support a kickstarter project to fix it?

2013-05-23 Thread Alex Epshteyn
Fair enough, but I'm curious to know why leaving the code that supports
legacy browsers would interfere with implementing new features.  For
example, if you want to implement a new widget called XPanel, it think it's
perfectly fine to say that this widget doesn't support IE6/7/8, and leave
it up to userland to chose whether to use the new widget and how to work
around it for new browsers.

Do you have a specific example?  I'm curious.


On Thu, May 23, 2013 at 5:54 PM, Jens jens.nehlme...@gmail.com wrote:

 To simplify the code base and moving on (HTML 5) I would say.

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Re: Exception reporting is broken in GWT: would you support a kickstarter project to fix it?

2013-05-23 Thread Jens


 Do you have a specific example?  I'm curious.


Existing widgets should also work great on mobile devices, its not just 
about writing new widgets. 

Its also not just about widgets in general. For example there is currently 
an issue in GWT-RPC where only IE9 has a memory leak because GWT-RPC uses 
eval() to parse the server response and IE9 keeps everything eval'd in 
memory. Slightly changing the server code and switching to JSON.parse() on 
the client would solve the problem, but IE6/7 do not support JSON.parse(). 
So to fix this issue for IE9 the server serialization needs to figure out 
which IE version is talking to the server and then generate different 
responses (either JS or JSON). Targeting different browsers on client side 
is easy (deferred binding) but this time the server must target different 
browser versions as well. So its more complicated than it could be.

https://code.google.com/p/google-web-toolkit/issues/detail?id=5736
https://gwt-review.googlesource.com/#/c/2900/

I think thats a good example where IE6/7 support costs more development 
resources although you know that IE6/7 doesn't really play a big role 
anymore. Microsoft recommends to not use them anymore and 2014 they will 
stop supporting IE6-8 as Windows XP extended support ends in April 2014.

So would you invest a lot of work today in supporting browsers whose 
support officially ends in less than a year? Probably not. Its a good time 
now to slowly phasing out IE6/7 and later IE 8 support.

-- J.

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Exception reporting is broken in GWT: would you support a kickstarter project to fix it?

2013-05-22 Thread Alex Epshteyn
One of the big problems with deployed GWT apps has always been the
impossibility of tracing JavaScript exceptions back to the Java source
code.  What we need is a true equivalent of Java stack traces.

There was an effort made by the GWT team a couple years ago to solve
this problem ( 
https://code.google.com/p/google-web-toolkit/wiki/WebModeExceptions
), and it was a good start, but unfortunately they gave up without
producing an adequate solution. If you've ever tried to use the
compiler.emulatedStack.recordLineNumbers setting, you know that it is
badly broken: the line numbers and file names reported in the stack
traces are incorrect most of the time, while the the resulting
compiled JavaScript is 70-90% larger than the original.  The way this
feature is currently implemented, the compiler puts instrumentations
in the wrong places most of the time, doesn't do enough to optimize
for code size, and does not provide enough information via symbol maps
for StackTraceDeobfuscator.  On Chrome, theoretically we could use
compiler.useSourceMaps instead, but that feature is badly broken too.

I have spent the last 2 months working on this problem full time, and
I almost have the perfect solution ready.  But I'm an indie developer,
and I can't really afford to go unpaid much longer, because I've
already put business aside for two months to work on this (originally
I thought it would take a week, but I kept finding more and more bugs
and tricky problems to solve, which is why I'm guessing the original
developers gave up on seeing this project through to fruition).

If I started a crowdfunding campaign to help me fund this work to
completion, would you or your employer be willing to contribute?  The
original Google Atlanta team did an amazing job developing GWT for 10+
years, but those guys are all gone, and Google has not had a dedicated
team working on GWT since last summer, so I think it will be up to the
user community to fund its future development from now on.

My goal is perfect JavaScript stack traces with exact Java line
numbers, with only a 50-60% output size increase and similar
performance metrics.  For browsers that support sourcemaps (only
Chrome for now), there will be no output size increase at all, because
I intend to fix all the bugs associated with the
compiler.useSourceMaps feature as well.

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Re: Exception reporting is broken in GWT: would you support a kickstarter project to fix it?

2013-05-22 Thread Jens
I dont think you will get paid for it, because:

1.) Its somewhat not in the spirit of open source software
2.) Your patch must go through review and there is no guarantee that it 
will be committed
3.) GWT will remove IE6/7 support soon and probably in 2014 also IE8 
support. Also Opera moves to WebKit. That means that there is probably no 
need for StackTrace emulation anymore in the near future as modern browsers 
provide the relevant information.

-- J.

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Re: Exception reporting is broken in GWT: would you support a kickstarter project to fix it?

2013-05-22 Thread Alex Epshteyn
Thanks for your comment.  Let me respond to your points:

1) I've seen this point discussed before, and the standard counter-argument
is that the spirit of OSS is free as in freedom, not beer.  Lots of
developers get paid to work on OSS projects.

2) This is actually one of the reasons I'm thinking about raising funds.  I
am already on the verge of using my patch inside my own GWT-based app, but
if I get some funding I'd be able to justify taking the extra time to make
sure the patch will pass the review process.

3) I must point out that your third argument is not in the spirit of GWT,
which aims to support as many browsers as possible.

As of today, you will not get good stack traces with GWT on any modern
browser, including WebKit.  By relevant information, I assume you mean
sourcemaps support.  Well, Chrome is the only browser that currently
supports sourcemaps but GWT's existing support for generating stack traces
with that information is very buggy, and this is one of the things I'm
working on improving.  I'm also not optimistic that sourcemaps will achieve
universal support any time soon, if ever.



On Wed, May 22, 2013 at 4:38 PM, Jens jens.nehlme...@gmail.com wrote:

 I dont think you will get paid for it, because:

 1.) Its somewhat not in the spirit of open source software
 2.) Your patch must go through review and there is no guarantee that it
 will be committed
 3.) GWT will remove IE6/7 support soon and probably in 2014 also IE8
 support. Also Opera moves to WebKit. That means that there is probably no
 need for StackTrace emulation anymore in the near future as modern browsers
 provide the relevant information.

 -- J.

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Re: Exception reporting is broken in GWT: would you support a kickstarter project to fix it?

2013-05-22 Thread Alex Epshteyn
Correction: when I said that a browser needs to support sourcemaps to
generate accurate stack traces, that wasn't entirely accurate.  What a
browser needs to support is the stack property of exception objects,
which provides a JavaScript stack trace with both line and column numbers.
 It's the GWT compiler that uses a sourcemap to derive original Java line
numbers and filenames from the browser-provided line and column numbers.
 This functionality is currently broken in GWT, however, and Chrome is
currently the only browser that provides column numbers.  And even if more
browsers add column info in the future, it's almost certain that their
stack trace formats will all be different, so we'll have to patch GWT every
time a new browser adds the support.  My proposed project will leave us in
good shape to be able to do that easily.


On Wed, May 22, 2013 at 5:53 PM, Alex Epshteyn alexander.epsht...@gmail.com
 wrote:

 Thanks for your comment.  Let me respond to your points:

 1) I've seen this point discussed before, and the standard
 counter-argument is that the spirit of OSS is free as in freedom, not
 beer.  Lots of developers get paid to work on OSS projects.

 2) This is actually one of the reasons I'm thinking about raising funds.
  I am already on the verge of using my patch inside my own GWT-based app,
 but if I get some funding I'd be able to justify taking the extra time to
 make sure the patch will pass the review process.

 3) I must point out that your third argument is not in the spirit of GWT,
 which aims to support as many browsers as possible.

 As of today, you will not get good stack traces with GWT on any modern
 browser, including WebKit.  By relevant information, I assume you mean
 sourcemaps support.  Well, Chrome is the only browser that currently
 supports sourcemaps but GWT's existing support for generating stack traces
 with that information is very buggy, and this is one of the things I'm
 working on improving.  I'm also not optimistic that sourcemaps will achieve
 universal support any time soon, if ever.



 On Wed, May 22, 2013 at 4:38 PM, Jens jens.nehlme...@gmail.com wrote:

 I dont think you will get paid for it, because:

 1.) Its somewhat not in the spirit of open source software
 2.) Your patch must go through review and there is no guarantee that it
 will be committed
 3.) GWT will remove IE6/7 support soon and probably in 2014 also IE8
 support. Also Opera moves to WebKit. That means that there is probably no
 need for StackTrace emulation anymore in the near future as modern browsers
 provide the relevant information.

 -- J.

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