Re: [Htmlunit-user] (no subject)

[Brad C. <pr...@ya...>]

I tried the change and it seems to at least speed up htmlunit's unit tests by a
couple of seconds. Compiling all the javascript when most of the time it's only used
once seems a little wasteful anyway, so I'm going to check it in. 

Chris: if this change doesn't fix the 64k barrier problem you're having please post
a bug in the tracker.

Brad C

--- Andrey Subbotin <asu...@oi...> wrote:

> The Rhino javascript interpreter HtmlUnit uses can run in two modes:
> compilation (where javascript code is converted into java classes; this is
> your case) and interpretation. If you have HtmlUnit source, you can go to
> JavascriptEngine.getPageInfo() and add line
> 
>     newPageInfo.context_.setOptimizationLevel(-1);
> 
> That will switch Rhino to interpretation mode and presumably solve your
> problem.
> 
> In fact I'd request HtmlUnit authors to either make it default mode, or at
> least make it configurable from public API. The compilation mode caused VM
> crashes for me (JDK 1.3.1.09 both Windows and Linux; our pages have large js
> files of about 500KB per page; after a sequence of 3-5 pages VM throws
> OutOfMemory exceptions in random places without actually taking significant
> memory from OS); switching to interpretation code fixed that without
> noticeable slowdown. The interpretation mode is more stable without any
> obvious downside.
> 
> Best regards
>     Andrey
> 
> From: "Erskine, Chris" <chr...@ed...>
> > I am getting the following Exception for a test that I am trying to
> develop.
> > It looks like the root cause is
> > java.lang.RuntimeException: java.lang.ClassFormatError:
> > org/mozilla/javascript/gen/c396 (Code of a method longer than 65535 bytes)
> > This appears to be due to compiling the JavaScript arrays that are defined
> > in on the page.  Is there some way to get around this problem?  Would it
> be
> > possible to fix HtmlUnit to break the source up into some smaller modules
> to
> > prevent this from happening.  If it is thought that this would work, I can
> > try to see if I can get it to work.
> 
> ..
> 
> > Enclosed exception:
> > java.lang.RuntimeException: java.lang.ClassFormatError:
> > org/mozilla/javascript/gen/c396 (Code of a method longer than 65535 bytes)
> > at
> > org.mozilla.javascript.optimizer.Codegen.compile(Codegen.java:113)
> > at org.mozilla.javascript.Context.compile(Context.java:2076)
> > at org.mozilla.javascript.Context.compile(Context.java:2006)
> > at org.mozilla.javascript.Context.compileReader(Context.java:899)
> > at org.mozilla.javascript.Context.evaluateReader(Context.java:817)
> > at org.mozilla.javascript.Context.evaluateString(Context.java:784)
> 
> ...
> 
>