tests run correctly
from 6 tests)
Site: http://www.kevs3d.co.uk/dev/asteroidsbench/
Regards,
Zoltan
How does TyGL perform compared to the other rasterizers?
What benchmarks do you use to guide the performance work?
On 11/12/14, 11:12 PM, Zoltan Herczeg wrote:
Hi All,
We are proud
Hi,
we encountered some unexpected issues with Cairo-EFL on our board. When it
works again, we will do some measurement.
Regards,
Zoltan
How does TyGL perform compared to the other rasterizers?
What benchmarks do you use to guide the performance work?
On 11/12/14, 11:12 PM, Zoltan Herczeg
Hi,
What makes the 2D drawing code WebKit-specific? Is it possible to package
up the rendering code into a self-contained standalone library?
It is possible to make it a standalone library in the future. But we are
working on WebKit, we want to accelerate WebKit graphics, and WebKit has a
nice
Hi All,
We are proud to announce the TyGL port (link:
http://github.com/szeged/TyGL) on the top of EFL-WebKit. TyGL (pronounced
as tigel) is part of WebKit and provides 2D-accelerated GPU rendering on
embedded systems. The engine is purely GPU based. It has been developed on
and tested against
Wow, this looks great!
Regards,
Zoltan
Hello all,
I’m excited to announce that I’ve begun work on upstreaming web replay
support into WebKit. Web replay functionality allows developers to debug
their web applications by exactly recording interactions with a web
program, and then replaying
However, I am quite happy that people have been working on improving the
libcURL support :-)
Thank you Brent. Although many people left, we are still here, and
continually improving WebKit. We are serious about it.
Regards,
Zoltan
___
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Perhaps we can come up with some JS API for shared memory lock and
propose it in TC39 or WebApps WG?
I think that would be wonderful. Anyone else interested?
We proposed a shared memory concept a long time ago:
https://bugs.webkit.org/show_bug.cgi?id=53485
Although it helps to reduce the
A message passing model a la Web Workers has some advantages compared to
threads with shared mutable state and locks:
- No possibility of deadlock
- No possibility of corrupting data structures due to races
- No performance penalty from correctly supporting fine-grained concurrent
access to
I may miss some mails, but I didn't see a proper reply for this mail.
Personally, I think WebKit and its community should also be grateful to
you guys. You did a lot for WebKit as well. Although the cooperation was
not always smooth, let's just keep the good memories. I wish you luck for
your
My point is that I think that lots of ports are part of what makes
WebKit the goodness it is. Maybe I'm alone here, or at best part of a
minority, but I wanted us to not lose sight of this idea.
I totally agree. But I also agree with those, who thinks the different
ports should not overburden
Where in WebKit do you experience problems with color conversion?
As for me WebKit2 transmits BGRA images, which needs to be converted to
RGBA before it is uploaded to a texture on GLES 2.0. These conversions
seems computation heavy for certain animations, and I was wondered whether
do we really
Hi,
In WebKit both RGBA and BGRA formats are used for different purposes and
different platforms in WebKit. Do we have a policy which one we prefer? It
would be nice to reduce conversions between them in the future as it seems
costly on embedded systems.
Regards,
Zoltan
Parsing, especially JS parsing still takes a large amount of time on page
loading. We tried to improve the preload scanner by moving it into
anouther thread, but there was no gain (except some special cases).
Synchronization between threads is surprisingly (ridiculously) costly,
usually worth for
On Jan 10, 2013, at 12:11 AM, Zoltan Herczeg zherc...@webkit.org wrote:
Parsing, especially JS parsing still takes a large amount of time on
page
loading. We tried to improve the preload scanner by moving it into
anouther thread, but there was no gain (except some special cases).
Synchronization
acceleration (yet). I
hope that we see a Core Image version of filters in the near future as
well. The code for that is in the history of the repository already.
Greetings,
Dirk
-Kling
On Nov 21, 2012, at 7:30 PM, Zoltan Herczeg zherc...@webkit.org wrote:
Hi,
we start upstreaming some OpenCL
Hi,
we start upstreaming some OpenCL optimizations into WebKit.
This is the master bug:
https://bugs.webkit.org/show_bug.cgi?id=70099
Regards,
Zoltan
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Just out of curiosity, how much code modifications are required? I read
the ABI documentation the link you attached, and x32 is a regular 64 bit
mode, except it seems to me that the global descriptor table is tweaked to
store the same descriptors for all 4G address spaces, so the upper 32 bit
is
Hi,
parts(DOM, CSS, JavaScript etc) . Currently there is a real-time chart in
Web Inspector that shows the render process memory broken down into
several
components:
Unfortunately this part is removed by the mail server, and from webkit-dev
archives, but as far as I remember (we measured
The ARM support for DFG-JIT is finished, and the patch is ready to review
at bug 90198.
Regards,
Zoltan
On the topic of JIT support, the baseline JIT's role is increasingly only
to serve only to gather profiling data for the DFG JIT, and if you want
high performance JavaScript on your
, Zoltan Herczeg zherc...@webkit.org wrote:
I don't want adding instructions to SH4, MIPS, and legacy ARM to be a
blocker for JSC work.
I didn't say you have to wait. I just said you should notify us that
something is coming which will break the build.
Regards,
Zoltan
Hi Filip,
we (Gabor Loki and me) are the maintainers of the traditional ARM port,
and we are willing to fix all issues. Just let us know what we need to do.
You can assign the necessary bug reports to us and we are available in the
#squirrelfish (or #webkit) channel as well.
Regards,
Zoltan
Hi
bot cycles discovering
all the cases that we missed.
This consumes a lot of time that would be better spent working on the
higher level portions of the JIT, that benefit all platforms.
--Oliver
On Jun 21, 2012, at 11:44 PM, Zoltan Herczeg wrote:
Hi Filip,
we (Gabor Loki and me
I don't want adding instructions to SH4, MIPS, and legacy ARM to be a
blocker for JSC work.
I didn't say you have to wait. I just said you should notify us that
something is coming which will break the build.
Regards,
Zoltan
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Where are they compiled twice? If in the object file, than it is ok, since
the compiler must provide a standalone function for even inline ones. It
is needed if the function is passed as pointer. These extra functions
should be thrown out by the linker in the final binary.
Regards,
Zoltan
It's
Hi,
I don't see why it would make sense to keep two parallel tools for this
once all the workflow bugs people have are addressed.
The reason is easy. In the past when people tried to add new features to
NRWT, they were not allowed to because the feature is not useful for NRWT
devs. Eventually
Hi Dirk,
At any rate, I believe we are definitely open to adding new features;
feel free to suggest them or work on them!
I am happy to hear that.
https://bugs.webkit.org/show_bug.cgi?id=88680
This is definitely a right step! And it looks like still a lot of things
to do before NRWT reach
Hi,
is there any reason why the transformations in WebKit use doubles? We
could optimize some functions further with ARM SIMD if they would be
floats. Is there any objection to make them float if the change would have
no other side effects except some rounding because of the lower precision?
Hi,
btw if anyone interested about the details of this optimization you can
read more about it here:
http://blogs.arm.com/software-enablement/699-using-arm-neon-to-accelerate-scalable-vector-graphics-in-webkit-by-up-to-4X/
Regards,
Zoltan
Hi Jonathan,
On 21/03/2012, at 12:56 AM, Jonathan
Sziasztok!
Jatszottam penteken OpenGL-el egy kicsit (MAC-en gluttal szepen ment), es
arra gondoltam hogy elindulas keppen csinalhatnank valami brainstormingot
az egesz temarol. Nem tudom ki mennyire ismeri az OpenGL es OpenVG
mukodeset (en sem tulsagosan).
Eszerint:
Oops sorry. Ignore this mail.
Regards,
Zoltan
Sziasztok!
Jatszottam penteken OpenGL-el egy kicsit (MAC-en gluttal szepen ment), es
arra gondoltam hogy elindulas keppen csinalhatnank valami brainstormingot
az egesz temarol. Nem tudom ki mennyire ismeri az OpenGL es OpenVG
mukodeset (en sem
But are you planning to run test builds against live websites? That's
not very polite on people's servers (i certainly wouldn't like anyone
stress-testing my own servers for their benefit). And like some other
people said, tests that rely on network randomness are not very
reliable indicators
Just be careful with copyright issues.
Regards,
Zoltan
Go for it.
Adam
On Sat, Jan 21, 2012 at 2:12 AM, Sergio Villar Senin svil...@igalia.com
wrote:
Hi,
I've been thinking about this for some time now, but only a recent bug
I'm constantly hitting these days
Hi!
Condition cc=ALL is the default function parameter in C++
(http://www.learncpp.com/cpp-tutorial/77-default-parameters/).
There is no conditional instruction support in MacroAssembler level in
SFX, but some lower-level optimizations use conditional execution.
Regards,
Zoltan
Hi!
I found
Hi,
I am working on rewriting the css lexer, and someone suggested that it
should be mentioned to a broader community, since we can drop the flex
tool dependency from WebKit which affects all build systems. This mail is
just a note, since the patch is not yet ready.
Hi Anton,
I am sorry if it didn't sound clear enough in our original message,
but we're not proposing a new language support, but we're proposing a
patch which allows others runtimes to run along with JS in the
browser.
and they mostly replied to that (including some solution ideas like
It's not quite true that multiple languages are exposed to the web. One
Turing-complete language is exposed, and any Turing-complete language can
be compiled to any other Turing-complete language. The fact that some
developers compile their favorite languages to JS doesn't mean that we
should
Hi,
WebKit supports ARM and Thumb2 instructions sets (called ARMv7). You can
find them here (or in your own source code):
http://trac.webkit.org/browser/trunk/Source/JavaScriptCore/assembler
SquirrelFish Extreme is just a codename for the JavaScript JIT compiler
(and Nitro is another).
The JIT
Hi,
I like this idea. Multicore cpus are getting widespread even in the
low-end devices nowadays.
Regards,
Zoltan
Hi folks.
To help move WebKit and JavaScriptCore forward, I'd like to remove old
platform cruft that creates particular pain points for development.
To that end, I'd like to
Hi,
ThreadSpecific contains the platform dependent TLS (Thread Local Storage)
implementation for WebKit.
In Platform.h:
#if PLATFORM(ANDROID)
#define WTF_USE_PTHREADS 1
...
Thus, Android should use pthread.h (Please check this line in your
Source/JavaScriptCore/wtf/Platform.h)
You could try
Hi,
If you maintain some bots, and you saw rounding issues which makes 1px
difference on let's say 32 and 64 bit environments for several layout
tests, you may interested in this bug:
https://bugs.webkit.org/show_bug.cgi?id=62204
I try to explain what exactly happens there, and it could be used
Like it. I only have a few questions:
* Where would the build (WebKitBuild) directory would go? Perhaps a Build/
would fit in the root directory.
* Some manual-tests belong to the regression tests, and some are belong to
the performance test. Would be good to separate them.
* I think the build
LayoutTests = Tests
That would kill the new Ttab is enough to enter the Tools directory
feature :P I like the Ltab for generic tests.
Cheers,
Zoltan
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Hm, thinking a bit about it I realized these renamings could help the
usability of the source code. I actually use a lot the WebKitBuild
directory, and would be happy if it would be renamed to Build (= Btab),
and Scripts could go to the root directory. In that case, LayoutTests =
Tests would be be
On 6 December 2010 22:31, Zoltan Herczeg zherc...@inf.u-szeged.hu
wrote:
Crash in WTF::fastMalloc? Such things only happen if something
overwrites
memory areas belongs to the memory manager (i.e overwrites some bytes
before or after a block returned by malloc). Try some valgrind
It is possible to add macros to the code to help valgrind know which
areas are being used by a custom allocator. (See
VALGRIND_MALLOCLIKE_BLOCK and VALGRIND_FREELIKE_BLOCK, for example.)
I'm not sure if they're useful in this situation, but they're worth
taking a look at.
I see. That
Hi,
try webkit-help, which is the right place for such qestions.
Regards,
Zoltan
Hi,
I'm having problems building WebKit Cairo port (from 23/11 nightly).
First it gives an error on RenderMediaControls.cpp which includes
CoreGraphics/CoreGraphics.h and it shouldn't (right? this is part of
Hi,
ANGLE looks like a graphics helper library. Why it is placed in the root
WebKit directory? Perhaps WebCore/platform/graphics or some kind of
/3rparty directory would be better, wouldn't it?
Regards,
Zoltan
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Patches sit in the queue for numerous reasons. Some of us used to
scan the queue every day. But I've stopped doing that. Now I scan it
more like once a week or two.
There is no good way to find which patches might I have a chance of
reviewing, so you end up spending 30 minutes just to
We can't really download them from stixfonts.org.
Alex, wouldn't be possible to contact them and ask some help? Maybe they
could offer us an acceptable solution.
Zoltan
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Hi,
nice job, Haithem.
This page explains how to contribute code to WebKit:
http://webkit.org/coding/contributing.html
You may find helpful the bugzilla entries for other JSC-JIT ports:
ARM: https://bugs.webkit.org/show_bug.cgi?id=24986
MIPS: https://bugs.webkit.org/show_bug.cgi?id=30144
Both
Hi,
why don't you simply use a workaround?
script
function success()
{
alert(Success);
continueTask(true);
}
function failure()
{
alert(Failure);
continueTask(false);
}
function continueTask(success)
{
x= 10+1;
}
/script
Zoltan
Hello,
As part of my project, we
Hi,
https://bugs.webkit.org/show_bug.cgi?id=32561
Zoltan
Is there any way to map specific bytecode instruction instances to the
position in the source code of the JavaScript code they correspond to?
--
View this message in context:
Hi!
Your wiki says:
DrawingArea - an abstraction for a cross-process drawing area. Multiple
drawing strategies are possible, the simplest is just a shared memory
bitmap.
Could you tell me more about it? I am working on a parallel painting
feature (GraphicsContext commands can be forwarded to
We should make the new tool record the order so order-specific failures
can be explored.
A custom random generator would be enough. The seed can be given by a user
or a just starts with a random value which is reported when the test
finish. Much easier to share seed-revision pairs than
Hi,
Thank all of you for your feedbacks!
Let's continue this discussion in the bug report, I will provide more
details there.
Zoltan
On Sat, Apr 3, 2010 at 9:32 PM, Zoltan Herczeg zherc...@inf.u-szeged.hu
wrote:
Hi,
I am working on a parallel painting feature for WebKit (bug id: 36883
, style resolution,
or javascript execution/bindings.
-eric
On Sat, Apr 3, 2010 at 10:32 PM, Zoltan Herczeg
zherc...@inf.u-szeged.hu wrote:
Hi,
I am working on a parallel painting feature for WebKit (bug id: 36883).
Basically it records the painting commands on the main thread, and
replay
Hi,
I am working on a parallel painting feature for WebKit (bug id: 36883).
Basically it records the painting commands on the main thread, and replay
them on a painting thread. The gain would be that the recording operation
is cheap. Currently it is Qt specific, but I could make it more platform
But in cases like the SharedBuffer one, there is no mystery about who
allocated the memory. The mystery is typically who is holding on to a
reference to it.
I have a technique to capture ref/deref problems with gdb. When the object
is created (inside the object constructor), I just put a
Hi,
It's also a big help when peers (which aren't necessarily WebKit
reviewers)
look over it and give review-style feedback as well. Especially when said
peers know more about that code than any of the official reviewers.
Is that really help? Sometimes when a patch looks good to me, it
Hi,
thanks for all of your for your help.
I would be worried about correctness - if painting is not complete by
the time the paint method returns, then you could get flashes of
intermediate states showing up onscreen.
We plan to do the painting on a background image. When all the painting
Hi,
the dateProtoFuncGetTimezoneOffset does not use the argList argument,
while functionPrint does. Perhaps passing this argument is still not yet
WinCE compatible. ArgList contains a pointer to the arguments (JSValue
pointers), and the length of the arguments. This structure is 8 bytes on
32 bit
Hi Patrick,
hm, I feel I found something. Please have a look at
JavaScriptCore/jit/JITOpcodes.cpp : privateCompileCTIMachineTrampolines.
The second one, when JSVALUE32_64 is disabled. If JIT_OPTIMIZE_NATIVE_CALL
is enabled, a specialized code is generated to call native builtin
functions (like
Hi,
it would be a great to have a macro in WebKit, which would be enabled on
embedded systems. We could replace macros like PLATFORM(SYMBIAN) in
TextCodecQt.cpp to this new macro. However, TARGET_OS_EMBEDDED macro
enables WTF_PLATFORM_IPHONE. Well, not only symbian and iPhone exist in
embedded
Hi,
according to my measurements, a large chunk of WebKit memory consumption
comes from WebCore::TextResourceDecoder::decode
(loader/TextResourceDecoder.cpp:818) which calls String::append
(String.cpp:82). The comment there says:
// FIXME: This is extremely inefficient.
I would volunteer to
Hi,
seems the original mail was sent to both webkit-dev and webkit-help. My
reply was on webkit-help, and the discussion continued there.
https://lists.webkit.org/pipermail/webkit-help/2009-November/000380.html
Perhaps we should clarify better the purpose of these mailing lists, since
if people
Hi,
these entry/leave functions are implemented in assembly for all ports. It
is faster this way. (Previously, the jit generated these functions, but
the reviewers convinced us to do this way).
External .asm files would be a nightmare, since we have to create (and
maintain) the build rules for
as I haven't
used 3 parameter assembler language before although I'm sure I could do
this with a couple of hours research.
Can you maybe show me how to get the jit to generate this for this
toolchain?
Jason.
-Original Message-
From: Zoltan Herczeg [mailto:zherc...@inf.u-szeged.hu
Hi
fortunately, no, I don't need double branch here. cmpvs reg0, reg0 is a
conditional instruction, which only executes if the v flag is set.
My proposal would be to add a new DoubleCondition called DoubleEqualOrNAN,
or something similar to clarify what we expect from the conditional
branch.
Hi,
My stougle with USE_JSVALUE32_64 still continues on ARM. In
emit_op_jfalse, there is a comparison here (fpRegT0 contains 0.0):
addJump(branchDouble(DoubleEqual, fpRegT0, fpRegT1), target + 2);
In x86, if either operand is NaN, the zero flag is set by definition
(ucomisd instruction). I have
a
BEQ or BNE is used afterwards) or to test for unorderedness (in the V
flag).
Gavin, do you have any ideas here?
Geoff
On Oct 12, 2009, at 4:05 AM, Zoltan Herczeg wrote:
Hi,
My stougle with USE_JSVALUE32_64 still continues on ARM. In
emit_op_jfalse, there is a comparison here (fpRegT0
Hi,
I am not sure this is a bug, so I am curios about your opinion. Currently,
I am trying to enable JSVALUE32_64 on ARM. First step, as usual, with all
optimizations disabled. Unfortunately, I got a crash. If JIT_OPTIMIZE_CALL
is disabled, callee is loaded to regT1 and regT2, while if enabled,
Hi Kevin,
WebKit approach is NOT to free memory before quit to make the quit process
as fast as possible. The memory manager should free the unfreed objects.
However, this approach makes really hard to find the real leaks (which
are unreferenced objects).
In my experince the unfreed (non-leak)
Hi,
-m64 means: generate code for 64 bit machines. ARM is not a 64 bit
architecture. Does your Ubuntu use a x86-64 kernel? Which WebKit platform
do you use? Perhaps a mechanism detected your architecture and pass this
flag to WebKit to make optimized code for your machine.
Zoltan
hi,
i'm
Darin has already submitted a big patch to the bug report, which hopefully
solve all of these issues.
Zoltan
In WTF_USE_JSVALUE32 DateInstance needs to override createStrucutre to
remove the HasDefaultMark bit
--Oliver
On Sep 2, 2009, at 6:54 AM, Zoltan Herczeg wrote:
Hi Geoff
Hi Oliver,
it seems on ARM using WTF_USE_JSVALUE32, the internal value of a date
object is sometimes freed by the garbage collector.
More specifically:
The double (millisecond) representation of a date object (returned by a
new Date expression) is stored in JSWrapperObject: m_internalValue. This
Hi,
Im not sure if Im asking the right place
yes :), such qestions should go to webkit-help
Cheers,
Zoltan
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will help to the leak hunters in the future.
Cheers,
Zoltan
On Thursday 30 July 2009 02:55:18 am Zoltan Herczeg wrote:
Hi,
any thoughts on this? I hope my qestion was clear :) I would like to
pack
the static declarations into wrapper classes, so we can add platform
and/or compilation mode (debug
Hi,
any thoughts on this? I hope my qestion was clear :) I would like to pack
the static declarations into wrapper classes, so we can add platform
and/or compilation mode (debug/release) dependent functionality to all
static variables (i.e: freeing them on exit).
Zoltan
Hi all,
Valgrind
Hi all,
Valgrind reports a lot of memory leaks when QtLauncher quits, because many
static local variables are not freed. I did a little research and realized
there is no consistent way to define static variables in webkit:
WebCore/css/CSSSelector.cpp: CSSSelector::extractPseudoType()
using a
Hi,
by default, gc::collect() is triggered by a timer at regular intervals. In
QtLauncher, gc::collect() is not called in any other way, so the remaining
JS objects cause memory leaks when QtLauncher exits. Although this
approach may not be considered a bug, since the program soon quits, I
would
Hi,
Can future versions
of the SunSpider driver be made so that they won't become irrelevant over
time?
I feel the weighting is more of an issue here than the total runtime.
Eventually some tests become dominant, and the gain (or loss) on them
almost determine the final results.
Besides,
Hi,
we hope the general arm-jit will soon go to mainline, so we could have
enough time to countinue our work on other JSC enhancements. We would like
to hear your opinion about them (Are they still valid? Has someone else
already been working on it? Which one is important for you?):
- runtime
Hi,
1) The armv7 port is separate from the armv6 work, and uses the thumb2
instruction set. Both ports are (I hope!) useful.
We hope it as well.
2) We would have liked to let the community know about the arm v7 port
sooner. Unfortunately, we were not at liberty to disclose it until the
Hi,
1.Want to know the build instructions for building WebKit on OMAP 3530?
WebKit is written in c++, so you don't need to do anything special for
your CPU. Just run WebKitTools/Scripts/build-webkit
2.Does the WebKit source need to be changed(makefile) so that it builds
for OMAP 3530?
If
Hi,
how can I extract the name of a JS function in JIT.cpp?
Zoltan
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On Jun 16, 2009, at 3:55 AM, Zoltan Herczeg wrote:
Hi,
how can I extract the name of a JS function in JIT.cpp?
Zoltan
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Hi guys at Apple,
it looks we are in the way of the train. You have plans, we don't know
about them, you have commit rights, we don't, so the tides are against us.
Hints on the mailing lists are scarce, although a year ago someone from
you asked whether others are interested in design
If you're interested in review or commit rights, they're granted based
on a track record of good work, good judgement, and good
collaboration. You can read more about the policy here:
http://webkit.org/coding/commit-review-policy.html
.
Please work on your collaboration skills. Right now,
Hi,
http://webkit.sed.hu/node/15
As you can see on the charts there, you should consider the whole
environment not just WebKit alone. Large amount of resources are allocated
by other libs as well.
Zoltan
On 2009-06-11, at 12:50, James Howlett wrote:
Hi,
Is there any plan to reduce the
structure or point to double is not aligned and I'm still trying to find
where they are.
I'm not sure how the fake stack would be, would you mind explains a bit
more?
Did you face same problem?
Thanks also for your articles that gives new ideas.
rgds
joe
--- On Wed, 6/3/09, Zoltan Herczeg
what you're envisaging 'fake_sp' would be used for.
I've just landed a patch to move the pushes pops in wrapper
functions, and to switch put transition realloc to use a regular
function call, hopefully this tidies things up a little.
cheers,
G.
On Jun 4, 2009, at 1:19 AM, Zoltan Herczeg
Hi,
true, some architectures have strict policies for stack handling. Perhaps
the worst one is PowerPC with its organized stack frame (back chains,
pre-defined register save areas, etc). I think a fake stack pointer for
JIT can solve the x86 compatibility problem.
1) allocate enough aligned
Hi,
we plans to make a super instruction for floor(expr1/expr2), which is an
integer division (if both operands are integer numbers). We hope it would
be benficial for embedded systems. I think the implementation would be
similar to the JS apply() function: the fast case detects whether both
Hi,
How to dump SquirrelFish opcode and machine code?
Here is what I would like to do, for each JS file that WebCore passes to
SquirrelFish, configure SquirrelFish to dump opcode and machine code.
Thank you for any tips.
I am not sure you can do SF byte code dump out of the box since SF
codes, no
interpreter. http://code.google.com/apis/v8/design.html#mach_code
Thank you.
On Thu, May 21, 2009 at 2:12 PM, Zoltan Herczeg
zherc...@inf.u-szeged.hu wrote:
Hi,
The JavaScript engine does 3 steps:
1) Parse JS files
2) Generate SquirellFish byte code (ByteCodeGenerator.h is part
Hi,
I don't think so. It is not worth to do it on a desktop pc since
interpreter is always slower than JIT. However, the story is different for
embedded systems, when they enter low-memory mode. We made some
experiments before, and it seems possible to switch between jit and
interpreter, but I am
Hi,
The JavaScript engine does 3 steps:
1) Parse JS files
2) Generate SquirellFish byte code (ByteCodeGenerator.h is part of it)
3) Compile SF byte code to machine code by its JIT compiler (optional)
The last step depends on the architecture (supported or not) and C++
compiler directives. If JIT
Hi,
I don't know anything about MIPS architecture (only x86, ARM and PowerPC),
but we have experienced similar things on ARM, until we have found the
gcc's __clear_cache(void* begin, void* end) function. It calls a kernel
utility, which flushes out the data cache (some mrc instructions can only
Hi,
I have made some measurements on ARM. You can read the results on our blog
site: http://webkit.sed.hu/node/14
Zoltan
Right now, the branch is about even with trunk on SunSpider.
Geoff
On May 5, 2009, at 6:11 AM, Zoltan Herczeg wrote:
Hi,
we have noticed that there is a new
Hi,
we have noticed that there is a new SquirellFish branch, called
Nitro-Extreme. You mentioned before (perhaps a year ago), that you plan to
change the JSNumber format to eliminate number (double) allocations. This
is the aim of this branch, isn't it? Do you have any results? Is it faster
than
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