Using a LUA script to write the subscriptions#30
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smasry wants to merge 1 commit intoanycable:masterfrom
Closed
Using a LUA script to write the subscriptions#30smasry wants to merge 1 commit intoanycable:masterfrom
smasry wants to merge 1 commit intoanycable:masterfrom
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Member
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Hey, thanks for the pull request! Why you decided to use Lua? Is there any performance bottleneck you hit into, and how much Lua improved the situation? |
Contributor
Author
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@Envek There are performance improvements using LUA. In testing we see a ~50% reduction from an average of 4ms to a 2ms when calling write_subscription with using a LUA script. |
Member
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Oh, wow, drop from 4 to 2 ms is a lot. It is surprising, tbh. Interesting, what Redis server are you using and how “far” it is from your application? High RTT can be a cause for this distinction. Also, do you use broadcasting and how many subscriptions per fingerprint you have? I tried to optimize this use case in #28, but didn't finish yet (maybe it is related, not sure). |
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Using a LUA script to write the subscriptions to redis.