Wow, that's absolutely fantastic. Would you like to contribute it upstream,
maybe a PR?

On Sun, 5 Mar, 2023, 9:21 pm Fikavec F, <fika...@yandex.ru> wrote:

> Thanks to everyone for your help (especially Mikhail Khludnev and Michael
> Gibney)!
>
>    I rewrote JSONResponseWriter using fasterxml jackson library
> (com.fasterxml.jackson.core.JsonGenerator, I took the SmileResponseWriter
> code as a basis) and added it to the collection as my own
> queryResponseWriter in solrconfig.xml - in the test virtual infrastructure
> I got 4x+ acceleration in json format without gzip (set http header
> 'Accept-Encoding: '), and about 2x with gzip enabled (with set http header
> 'Accept-Encoding: gzip'). I think that on real hardware, the acceleration
> may be a little more. CBOR from the jackson library turned out to be also
> very fast and easy to add, it is also supported in python by the cbor2
> library and works very very fast, which is not to say about smile.
>
>    Now we know for sure that Solr is capable of sending data in json
> format at speeds of more than a few gigabits+, but the default
> JSONResponseWriter cannot overcome 450 megabits - using the jackson library
> for serialization solves this problem (
> https://github.com/wizzardo/json-benchmarks).
>
> Best Regards,
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