Thank you for your prompt response.
I am not sure how, but this commit
https://github.com/v8/v8/commit/8c7c087812e343ed8f2c37b21a29aa0de560268d
decreases the speed by 10-20 times.

On Thu, 23 Feb 2023 at 15:29, Jakob Gruber <[email protected]> wrote:

> Hi Victor,
>
> please bisect into V8 and if you find the culprit commit, file a bug at
> crbug.com/v8/new.
>
> On Thu, Feb 23, 2023 at 2:25 PM Victor Polevoy <[email protected]>
> wrote:
>
>> Forgot to mention two things.
>> To define this function, the redis-cli has to be used:
>>
>> ❯ redis-cli
>> 127.0.0.1:6379> RG.FUNCTION LOAD "#!js name=lib\n
>> redis.register_function('foo', ()=>{return 1;});"
>>
>> Another thing is that one has to have Redis installed and the RedisGears
>> module loaded. The easiest way to start is the README within the
>> repository:
>> https://github.com/RedisGears/RedisGears/blob/master/README.md#getting-started
>> On Thursday, 23 February 2023 at 14:22:14 UTC+1 Victor Polevoy wrote:
>>
>>> We found a huge performance degradation from version *10.8.168.21*
>>> until version *10.9.194.9*.
>>>
>>> Version 10.8.168.21
>>> Summary: throughput summary: *469483.56* requests per second latency
>>> summary (msec): avg min p50 p95 p99 max 0.205 0.168 0.183 0.327 0.863 1.055
>>>
>>> Version 10.9.194.9
>>> Summary: throughput summary: *20759.81* requests per second latency
>>> summary (msec): avg min p50 p95 p99 max 2.356 0.584 2.383 2.735 3.023 5.999
>>>
>>> The latest available version, *11.0.226.16*, still has the same issue.
>>>
>>> We use V8 in our RedisGears project (
>>> https://github.com/RedisGears/RedisGears/). We use redis-benchmark for
>>> performance measurements - if you have Redis installed and running, define
>>> the function:
>>>
>>> *RG.FUNCTION LOAD "#!js name=lib\n redis.register_function('foo',
>>> ()=>{return 1;});"*
>>>
>>> And then run the benchmark:
>>>
>>> *redis-benchmark -c 1 -P 100 rg.fcall lib foo 0*
>>>
>>> We had to downgrade to the 10.8.168.21 version as a decrease of 20x is a
>>> bit too much.
>>>
>>> --
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-- 
Best, Victor Polevoy.

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