v8 provide Extension for the reusable scripts or native code, you
could special the extension when create context
std::auto_ptr<v8::ExtensionConfiguration> cfg;
// fill the array
for (size_t i=0; i<ext_names.size(); i++)
{
ext_ptrs.push_back(ext_names[i].c_str());
}
if (!ext_ptrs.empty()) cfg.reset(new v8::ExtensionConfiguration
(ext_ptrs.size(), &ext_ptrs[0]));
m_context = v8::Context::New(cfg.get());
if you could use python, the code should be like following in pyv8
<http://code.google.com/p/pyv8/source/browse/trunk/demos/ext.py>
from PyV8 import *
firstSrc = "function hello(s) { return 'hello ' + s; }"
firstPy = JSExtension("hello/javascript", firstSrc, register=False)
firstPy.register()
secondSrc = "native function title(s);"
secondPy = JSExtension("title/python", secondSrc, lambda secondfunc:
lambda name: "Mr. " + name, register=False)
secondPy.register()
with JSContext(extensions=['title/python', 'hello/javascript']) as
ctx:
print ctx.eval("hello(title('flier'))")
On 1月3日, 上午6时15分, mme <[email protected]> wrote:
> I am experimenting with having a lot of different contexts(1000+)
> running in a single process multi threaded application which share the
> same javascript codebase.
> Every time a new context is created, I currently run the compiled
> javascript source code in the scope of the new context.
> Depending on the size of the source code, the memory usage of a single
> context goes up to over 1MB in my tests, too much for the application
> I have in mind.
>
> Is it possible to either:
>
> .) serialize contexts that have not been used recently to disk and
> load them back into memory on demand
> .) create a single context containing the javascript definitions once
> and "link" new contexts to this context
> .) reduce memory usage by creating a custom snapshot that contains my
> javascript source at runtime
>
> or would this go against v8's design ?
>
> Is there any other way to reduce memory usage in this case?
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