I do have another question before creating another Isolate: Would creating a new Context (from the main Node Isolate) be suited to work in a thread?
Le mardi 4 août 2020 à 11:02:25 UTC-4, Paul Maréchal a écrit : > Thanks for the pointers! I'll go with creating an Isolate and keep it in > the scope of the native thread for all my RegExp evaluations. I was eyeing > shipping a different regex engine already, but thanks to what you wrote > I'll be able to try using v8's and see if that is enough for me. > > Le mardi 4 août 2020 à 06:03:35 UTC-4, Jakob Kummerow a écrit : > >> Creating a separate Isolate for RegExp work is certainly possible. >> Whether it's a good idea depends on your constraints. Things to consider: >> - creating an Isolate has a cost; you can reduce overhead if you can keep >> it around for several RegExp evaluations >> - on the flip side, keeping an Isolate (and its heap) around consumes >> more memory >> - you could ship another RegExp engine instead, at the cost of some >> binary size >> - depending on how many RegExps you want to evaluate and at what times, >> you could consider doing that on the main thread in the existing (Node) >> Isolate, and only do non-RegExp work on the background thread. >> >> >> On Tue, Aug 4, 2020 at 12:38 AM Maréchal Paul <[email protected]> >> wrote: >> >>> Hi Jakob, >>> >>> Thank you for the answer. Now that you mention it, even with the >>> `Local<RegExp> New(Local<String> pattern, Flags flags)` method, I'd need an >>> isolate to hold the pattern indeed. >>> >>> Then I have the following question: Is it a good idea for me to try and >>> instantiate an Isolate of some sort, and have that run in the native thread >>> I try to run the regexp into? >>> >>> Le lun. 3 août 2020 à 17:44, Jakob Kummerow <[email protected]> a >>> écrit : >>> >>>> A v8::RegExp requires an Isolate. (There are at least two indicators >>>> for this: (1) the class RegExp derives from Object, as such they are >>>> JavaScript objects, and JavaScript objects always belong to an Isolate; >>>> (2) >>>> Local<>s are used to hold RegExp instances, and Locals are used to refer >>>> to >>>> objects on the managed heap, which is part of an Isolate.) >>>> >>>> Aside from that, v8::RegExps operate on v8::Strings, which also require >>>> an Isolate to live in. >>>> >>>> >>>> On Mon, Aug 3, 2020 at 10:37 PM Paul Maréchal <[email protected]> >>>> wrote: >>>> >>>>> Hi, >>>>> >>>>> I am writing a Node.js addon that does work in a native thread. I need >>>>> to run a regex match in said thread and I was hoping to use V8's RegExp >>>>> objects. >>>>> >>>>> It is fair to say that I'm not a C++ expert, so I was wondering if >>>>> anyone had any pointers regarding this? Is it even possible/a good idea? >>>>> >>>>> The API I am looking at has a deprecated static method that looked >>>>> interesting but I don't understand how I am supposed to use the new one? >>>>> https://v8docs.nodesource.com/node-10.15/d8/da7/classv8_1_1_reg_exp.html#aad5eb4ac27a23660c32f289da9427367 >>>>> >>>>> Thanks in advance, >>>>> Paul. >>>>> >>>>> -- >>>>> -- >>>>> v8-dev mailing list >>>>> [email protected] >>>>> http://groups.google.com/group/v8-dev >>>>> --- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "v8-dev" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/v8-dev/667aed79-f5df-4005-ab55-e079cfc20b92n%40googlegroups.com >>>>> >>>>> <https://groups.google.com/d/msgid/v8-dev/667aed79-f5df-4005-ab55-e079cfc20b92n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> >>>> -- >>>> -- >>>> v8-dev mailing list >>>> [email protected] >>>> http://groups.google.com/group/v8-dev >>>> --- >>>> You received this message because you are subscribed to a topic in the >>>> Google Groups "v8-dev" group. >>>> To unsubscribe from this topic, visit >>>> https://groups.google.com/d/topic/v8-dev/B7tJko0Itnk/unsubscribe. >>>> To unsubscribe from this group and all its topics, send an email to >>>> [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/v8-dev/CAKSzg3QpALxgBg8d4x1Uc8DENY09xRmhT%2Bjuo%2B_GYpOFDfpgng%40mail.gmail.com >>>> >>>> <https://groups.google.com/d/msgid/v8-dev/CAKSzg3QpALxgBg8d4x1Uc8DENY09xRmhT%2Bjuo%2B_GYpOFDfpgng%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- >>> -- >>> v8-dev mailing list >>> [email protected] >>> http://groups.google.com/group/v8-dev >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "v8-dev" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> >> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/v8-dev/CAOKZV0a-X7RVVrr%3DQ%2B%2B%2Bi0FsCdfXt8VdTGWycofVvXJYyeTdfQ%40mail.gmail.com >>> >>> <https://groups.google.com/d/msgid/v8-dev/CAOKZV0a-X7RVVrr%3DQ%2B%2B%2Bi0FsCdfXt8VdTGWycofVvXJYyeTdfQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- -- v8-dev mailing list [email protected] http://groups.google.com/group/v8-dev --- You received this message because you are subscribed to the Google Groups "v8-dev" group. 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