Well, doing something 100,000 times takes time. Why do you expect it to be
faster? What does your JavaScript function do? How long does it take to
execute it a single time? Have you profiled your app? Have you narrowed
down whether the majority of the time is spent in JS or C++? And in which
line(s)?
On Thu, Jan 24, 2013 at 7:36 AM, Neha <nehatripathi28...@gmail.com> wrote:
> To be more elaborate, i am trying to use v8 on windows woth C++
> application.
>
> When i initialize my application, i compile the script.
> The compile script is stored along with the context in which it is
> compiled.
> So i have code as follows:
>
>
> v8::Persistent <v8::Context> context = v8::Context::New( NULL, context);
>
> v8::Handle <v8::String> source = v8::String::New ( "my script");
>
> v8::Handle <v8::Script> compiledSource = v8::Script::Compile( source );
>
> v8::Persistent <v8::Script > scriptHandle =
> v8::Persistent<v8::Script>::New(compiledSource );
>
> I cache the scriptHandle, and context (Persisten handle) in my application.
>
>
>
> Later in another funtion i try to Run the script as follows:
>
> {
>
> v8::Locker l( isolate );
>
> v8::Isolate::Scope iscope( isolate );
>
> v8::HandleScope handle_scope;
>
> for(int i = 0; i < 1; i++)
> {
> //pV8Item is the object (cache) where is store the persistent handle of
> context and compiled script
>
> ( pV8Item->contextOrder )->Enter();
>
> ( pV8Item->objOrder )->SetInternalField( 0, v8::External::New(order) );
>
> ( pV8Item->sRulepCompExp )->Run();
>
> }
>
> }
>
> I have to run the above function 100,000 times. There is a performance hit
> here. The function takes a long time to execute. Any help on this?
>
>
>
>
>
>
> On Tuesday, January 22, 2013 4:53:08 PM UTC+5:30, Neha wrote:
>
>>
>> The function having the performance hit :
>>
>>
>> v8::Locker l( isolate );
>>
>> v8::Isolate::Scope iscope( isolate );
>>
>> v8::HandleScope handle_scope;
>> for(int i = 0; i < 1; i++)
>> {
>> //pV8Item is the object (structure) where is store the persistent handle
>> of context and compiled script
>>
>> ( pV8Item->contextOrder )->Enter();
>>
>> ( pV8Item->objOrder )->SetInternalField( 0, v8::External::New(order) );
>>
>> ( pV8Item->sRulepCompExp )->Run();
>>
>>
>> }
>>
>> On Tuesday, January 22, 2013 1:54:13 PM UTC+5:30, Neha wrote:
>>
>>> Hi,
>>>
>>> I store the context and compiled source in a persistent handle.
>>> Later i try to retrive the persistent handle and in the stored context
>>> try the run the script.
>>>
>>> like->
>>>
>>> context->Enter();
>>> script->Run();
>>> context->Exit();
>>>
>>> I see a huge performance hit here. It takes about 500 ms to just execute
>>> the above three statements. is there any solution to this?
>>>
>> --
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>
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