So it turns out that I was using *mksnapshot* incorrectly.
My procedure is now:-
1. Create snapshot ...
*./mksnapshot --extra_code my code.js my_snapshot.cc*
2. Copy snapshot ...
* cp **my_snapshot.cc*
* ./obj.target/v8_snapshot/geni/snapshot.cc*
3. Rebuild *Node*
Starting *node* results in availability of code from *my_code.js*.
Thus far - the code that I can *snapshot* needs to be really simple, and not
dependent on other packages.
For instance - I cannot access *console.log(..) * or use *require*.
... Any thoughts on getting these to work ? Can I combine *many* JS
files in a snapshot ?
Thanks in advance.
- Hugh
On Thursday, 7 January 2016 05:37:29 UTC-5, Jochen Eisinger wrote:
>
> The snapshot used by V8 in this case is only for builtin objects such as
> Math or Date. The current version of V8 has something called "V8 extras"
> that can be used to add additional scripts to the snapshot, but I'm not
> aware of anybody using that for node.
>
> On Wed, Jan 6, 2016 at 9:22 PM Hugh Fitzpatrick <[email protected]
> <javascript:>> wrote:
>
>>
>> Folks,
>>
>> I'm trying to understand how to use the 'snapshot' feature in v8.
>>
>> I am currently using node-v0.12.7 ... a little old - but should be ok.
>>
>> I have modified 'node.gyp' to enable snapshots.
>>
>> I can convert my sample 'foo.js' to 'snapshot.cc' via *mksnapshot* and
>> see that v8::NewContextFromSnapshot() is being called.
>>
>> So it seems that my snapshot is compiled-in, and being deserialized when
>> I run .node'.
>>
>> 'foo.js' contained a function called "sayHello()".
>>
>> I cannot call this function by v8-script-compile-run means or using the
>> REPL from node.
>>
>> Question - What am I doing wrong ?
>>
>> Is there a simple step-by-step example anywhere ?
>>
>> Thanks in advance.
>>
>> - Hugh
>>
>>
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