We are embedding V8 into our shared library that is accessed in two ways.
The first is through a node module we built. We also have daemonized
services that access the library directly, not through node. We are seeing
performance problems in both, and think there may be a problem with the V8
linking in node and us linking it in separately.
On Tuesday, November 24, 2015 at 2:53:37 AM UTC-8, Jakob Kummerow wrote:
>
> How do you link your embedding application?
>
> On Tue, Nov 24, 2015 at 1:13 AM, Nick Sorrentino <ni...@metavine.com
> <javascript:>> wrote:
>
>> Yes I have the same results when running d8, so it must be an issue in
>> the way I have it built up. Do I need to initialize V8 different now to
>> utilize snapshots? Or possibly a change to my make script? The embedders
>> guide mentions a method InitializeExternalStartupData, but that looks like
>> it is not in version 4.5.
>>
>> On Monday, November 23, 2015 at 1:36:39 AM UTC-8, Jakob Kummerow wrote:
>>
>>> Well, for me turning the snapshot on or off reproduces exactly what
>>> you're seeing, and I'm not seeing any other regressions:
>>>
>>> current tip of tree:
>>> $ time out/x64.release/d8 -e ""
>>> real *0m0.011s*
>>> user 0m0.003s
>>> sys 0m0.008s
>>>
>>> current tip of tree, snapshot=off:
>>> $ time out/x64.release/d8 -e ""
>>> real *0m0.064s*
>>> user 0m0.052s
>>> sys 0m0.012s
>>>
>>> branch-heads/4.5:
>>> $ time out/x64.release/d8 -e ""
>>> real *0m0.014s*
>>> user 0m0.007s
>>> sys 0m0.007s
>>>
>>> branch-heads/4.5, snapshot=off:
>>> $ time out/x64.release/d8 -e ""
>>> real *0m0.094s*
>>> user 0m0.086s
>>> sys 0m0.008s
>>>
>>> branch-heads/4.1:
>>> $ time out/x64.release/d8 -e ""
>>> real *0m0.015s*
>>> user 0m0.005s
>>> sys 0m0.010s
>>>
>>> branch-heads/4.1, snapshot=off:
>>> $ time out/x64.release/d8 -e ""
>>> real *0m0.089s*
>>> user 0m0.077s
>>> sys 0m0.012s
>>>
>>>
>>> On Sat, Nov 21, 2015 at 7:19 PM, Nick Sorrentino <ni...@metavine.com>
>>> wrote:
>>>
>>>> Sorry, I should have mentioned, we did try with both snapshot on and
>>>> off and still had the same performance issue.
>>>>
>>>> On Saturday, November 21, 2015 at 3:26:15 AM 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-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-u...@googlegroups.com <javascript:>
>> 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 <javascript:>.
>> 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.
