On Tue, Nov 24, 2015 at 2:11 PM, Chia-Wen Ho <chiawen...@gmail.com> wrote:
> Hi Jakob,
>
> One interesting point to me here. You mention in "3.32 was just a random
> daily snapshot". What kind of objects will be included in the snapshot?
>
Sorry, I didn't mean that in the "snapshot=off" sense. I meant: "version
3.32" is just a snapshot of our repository on some arbitrary day, not an
officially supported stable version. Some projects use the term "nightly
build".
> I am also doing the upgrade from 3.25 to 4.5. For my application, I need
> to replace all original "Error Object" with my customized one (doing in
> JavaScript space, not C++).
> In 3.25 version, it worked ok. However, after upgrading to 4.5, it is not
> working any more! I found turning "snapshot=off" solved this problem. Based
> on the observation, I think the default snapshot in 4.5 contains "Error
> Object", while in old version (3.25), "Error Object" is not included in the
> random snapshot? Is my guess right? Could you help point out where I can
> "customize" the snapshot? (Currently I turn off snapshot, and I'm afraid I
> have performance issue, sign...). Thanks.
>
I'm not sure I understand. You shouldn't need to customize the snapshot.
Are you modifying V8's source code? What does "it is not working" mean?
> On Saturday, November 21, 2015 at 7:26:15 PM UTC+8, Jakob Kummerow wrote:
>>
>> The purpose of the snapshot is to speed up Isolate and Context creation.
>> If you build with snapshot=off, startup will be slower.
>>
>> (Also, I'm really glad you're moving away from version 3.32.3, which was
>> just a random daily snapshot, not suitable for production use.)
>>
>> On Sat, Nov 21, 2015 at 2:34 AM, Nick Sorrentino <ni...@metavine.com>
>> wrote:
>>
>>> We recently updated our version of V8 from 3.32.3 to 4.5.103.35. We are
>>> seeing a major performance impact on Isolate and Context creation.
>>>
>>> In version 4.1 we were seeing times around 6ms and on 4.5 we are seeings
>>> times around 45ms. The code we are benching marking is below. Any
>>> guidance here?
>>>
>>>
>>> // Initialise the isolate create parameters
>>>
>>> Utility::ArrayBufferAllocator allocator;
>>>
>>> v8::Isolate::CreateParams create_params;
>>>
>>> create_params.array_buffer_allocator = &allocator;
>>>
>>>
>>>
>>> // Create a v8 isolate object
>>>
>>> v8::Isolate* pIsolate = v8::Isolate::New( create_params );
>>>
>>>
>>>
>>> // Execute the script
>>>
>>> {
>>>
>>> // Lock the v8 isolate object
>>>
>>> v8::Locker oLocker( pIsolate );
>>>
>>>
>>>
>>> // Create a scope for the v8 isolate object
>>>
>>> v8::Isolate::Scope oIsolateScope( pIsolate );
>>>
>>>
>>>
>>> // Create a handle scope
>>>
>>> v8::HandleScope oHandleScope( pIsolate );
>>>
>>>
>>>
>>> // Create a template for the global object where we set the
>>> built-in global functions.
>>>
>>> v8::Handle<v8::ObjectTemplate> global = v8::ObjectTemplate::New(
>>> pIsolate );
>>>
>>>
>>>
>>> // Bind the functions to the global object template
>>>
>>> global->Set( v8::String::NewFromUtf8( pIsolate, u8
>>> "VEUnconfigureAnchorContext" ), v8::FunctionTemplate::New( pIsolate,
>>> LocalUnconfigureAnchorContext, v8::External::New( pIsolate,
>>> m_pScriptObject ) ) );
>>> //more methods added here (~200)
>>>
>>> // Create a new context based on the global object template
>>>
>>> v8::Handle<v8::Context> oContext = v8::Context::New( pIsolate,
>>> NULL, global );
>>>
>>> }
>>>
>>>
>>> How We are making version 3.32
>>> make library=shared soname_version=3.32.3 i18nsupport=off
>>> OUTDIR=../$(DEPS_BUILD_BASE_DIR)v8 x64.release
>>>
>>> How We are making version 4.5
>>>
>>> make library=shared soname_version=4.5.103 i18nsupport=off snapshot=off
>>> OUTDIR=../$(DEPS_BUILD_BASE_DIR)v8 x64.release
>>>
>>>
>>>
>>> Any advice our guidance would be greatly appreciated.
>>>
>>> --
>>> --
>>> v8-users mailing list
>>> v8-u...@googlegroups.com
>>> http://groups.google.com/group/v8-users
>>> ---
>>> You received this message because you are subscribed to the Google
>>> Groups "v8-users" group.
>>> To unsubscribe from this group and stop receiving emails from it, send
>>> an email to v8-users+u...@googlegroups.com.
>>> For more options, visit https://groups.google.com/d/optout.
>>>
>>
>> --
> --
> v8-users mailing list
> v8-users@googlegroups.com
> http://groups.google.com/group/v8-users
> ---
> You received this message because you are subscribed to the Google Groups
> "v8-users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to v8-users+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
>
--
--
v8-users mailing list
v8-users@googlegroups.com
http://groups.google.com/group/v8-users
---
You received this message because you are subscribed to the Google Groups
"v8-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to v8-users+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
