Okay, I'm going to be playing around with this code and other
approaches for "[C" compression.
Weldon -
you say:
historically things like string compression make a difference to
heap footprint and cache miss performance
do you know of other VMs that do this optimizations and if so if
there is any public documentation?
- Craig
On Sep 22, 2006, at 7:32 AM, Weldon Washburn wrote:
hmm... I tried to putting a standard title on this email. It
looks like we
all suffer from too much email. So I repeat what I said earlier.
All,
I took a look at this code. I vote for keeping it. The reason is
because
Java is string intensive and historically things like string
compression
make a difference to heap footprint and cache miss performance.
It looks
like a significant amount of work has already been put in this code.
Craig,
It would be great if you can work on this code and get it going. I
would be
happy to work with you to get the mods committed to Harmony svn.
On 9/22/06, Alexey Varlamov <[EMAIL PROTECTED]> wrote:
Just a thought:
DRLVM yet does not support 4-byte supplement characters of UTF8
(6-bytes encoded in classfiles v49) - and this code may appear useful
if/when we are going to fix that...
--
Alexey
2006/9/21, Geir Magnusson Jr. <[EMAIL PROTECTED]>:
> So do we fix it or scrap it?
>
> geir
>
> On Sep 20, 2006, at 10:23 AM, Ivan Volosyuk wrote:
>
> > This is an old code and it is unused for quite some time. Most
likely
> > it is broken.
> > --
> > Ivan
> >
> > On 9/20/06, Craig Zilles <[EMAIL PROTECTED]> wrote:
> >>
> >> I noticed in the file trunk/vm/vmcore/src/util/
> >> vm_strings.cpp there
> >> is some code to support the storage of strings in arrays of (8b)
> >> bytes rather than arrays of (16b) unsigned shorts. In the
debugger,
> >> I placed breakpoints in this code, and it was never active in
my run.
> >>
> >> Can someone tell me the current status of this code and,
> >> if it is
> >> active, how I can turn it on? (From inspecting the source,
it looked
> >> inactive via hardcoding "false" on whether to compress the
strings).
> >> I might be interested in working on this code.
> >
> >
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>
>
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--
Weldon Washburn
Intel Middleware Products Division
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