Just following up to my initial post, I have implemented the above
look in native code using Android's SDK. The native code performs in
a few milliseconds as hoped. This goes to confirm that for compute
intensive tasks, Dalvik can be hundreds of times slower than native.
Hi,
Can you
The Android 2.1 SDK is out, but - at least from a first test on the
emulator that comes with the SDK - it does not look like the Dalvik
JIT has been activated :-(.
On 7 Jan., 17:55, Biosopher biosop...@gmail.com wrote:
The Dalvik JIT appears to result in a 1.7x improvement when run on an
armv7.
I was under the impression that was coming with Flan. 2.1 is still Eclair.
S
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Sena Gbeckor-Kove
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On Jan 7, 9:06 am, Biosopher biosop...@gmail.com wrote:
Just following up to my initial post, I have implemented the above
look in native code using Android's SDK. The native code performs in
a few milliseconds as hoped. This goes to confirm that for compute
intensive tasks, Dalvik can be
On Jan 7, 8:55 am, Biosopher biosop...@gmail.com wrote:
The Dalvik JIT appears to result in a 1.7x improvement when run on an
armv7.
That's a stale prototype. Quoting from the link you included, an old
snapshot of what we consider a promising proof-of-concept.
The Android team's independent
So, any news of the official Android version?
Cheers
S
---
Sena Gbeckor-Kove
CTO/Founder - imKon
UK : +44 7788 146652
NL : +31 62 434 1290
s...@imkon.com|www.imkon.com
Asia (Singapore) :
35 Selegie Road, #09-14/15 Parklane Shopping Mall, 188307 Singapore, Singapore
Europe
The Dalvik JIT appears to result in a 1.7x improvement when run on an
armv7.
Here's the post from the Android team:
http://groups.google.com/group/android-platform/browse_thread/thread/331d5f5636f5f532/dee6e0a81ae72264?#dee6e0a81ae72264
The Android team's independent benchmark results are here
Hi dm1973,
Actually these tests are not useless. Of course good modern compilers
should optimize away the code above. The reality is that the Android
compiler is not a good compiler so it does not optimize the above
code. This allows the simple example above to show the performance
limitations
Just following up to my initial post, I have implemented the above
look in native code using Android's SDK. The native code performs in
a few milliseconds as hoped. This goes to confirm that for compute
intensive tasks, Dalvik can be hundreds of times slower than native.
--
You received this
Fyi, there is no Dalvik or Android compiler; the Java code is just compiled
with the regular javac.
On Thu, Jan 7, 2010 at 9:03 AM, Biosopher biosop...@gmail.com wrote:
Hi dm1973,
Actually these tests are not useless. Of course good modern compilers
should optimize away the code above. The
Flan not 2.1 which is still Eclair.
S
---
Sena Gbeckor-Kove
CTO/Founder - imKon
UK : +44 7788 146652
NL : +31 62 434 1290
s...@imkon.com|www.imkon.com
Asia (Singapore) :
35 Selegie Road, #09-14/15 Parklane Shopping Mall, 188307 Singapore, Singapore
Europe (London) :
145-157 St
You'll have to use the NDK and write some native C code to do your
math, that will speed it up a lot. And use fixed point if you need
floats.
-niko
On Jan 6, 11:08 am, Biosopher biosop...@gmail.com wrote:
I'm writing a processing intensive digital sound processing app
(requires numerous
Thanks Niko,
I've been researching the NDK and am about to run the same performance
tests there as well. I really didn't want to add the additional
complexity of the NDK but seems that might be the only solution.
I found a blog documenting the same performance issues so it appears
my own
the next sdk release is suppose to have a Dalvik JIT i nit doubling
speed/performance..
I am in the same boat, have image processing projects but am holding
off until JIT is out..
On Jan 6, 11:49 am, niko20 nikolatesl...@yahoo.com wrote:
You'll have to use the NDK and write some native C code
Do you have any references for the statement below? And does next sdk
release refer to the Android 2.1 SDK?
Thanks
On 6 Jan., 19:49, Fred Grott(Android Expert, http://mobilebytes.wordpress.com)
fred.gr...@gmail.com wrote:
the next sdk release is suppose to have a Dalvik JIT i nit doubling
Your tests are pretty useless. Most modern compilers will optimize
away all of that code so what you are measuring is the overhead of
your timing code.
That being said interpreted byte code is slow. Either write native
code where it matters or wait for JIT.
On Jan 6, 9:08 am, Biosopher
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