build: support PGO

[wanghenshui]

No description provided.

[AlexStocks]

恨水：编译选项，在编译阶段生成 profile，然后进行调优。

[zamazan4ik]

@wanghenshui @AlexStocks what is the status of this task? I didn't find related to PGO changes in Pika.

Recently I did many PGO benchmarks on multiple projects - the results are available here. I think the most interesting results for you will be PGO results on different databases (including Redis, Memcached, DragonflyDB, and many others) - link.

We need to evaluate PGO's applicability to Pika. And if it helps to achieve better performance - add a note to the documentation about that. In this case, users and maintainers will be aware of another optimization opportunity for Pika. Also, PGO integration into the build scripts can help users and maintainers easily apply PGO for their own workloads.

After PGO, I can suggest evaluating LLVM BOLT as an additional optimization step after PGO.

If you already tested PGO on Pika - could you please share the current status with the performance results?

Thanks in advance!

[wanghenshui]

@wanghenshui @AlexStocks what is the status of this task? I didn't find related to PGO changes in Pika.

Recently I did many PGO benchmarks on multiple projects - the results are available here. I think the most interesting results for you will be PGO results on different databases (including Redis, Memcached, DragonflyDB, and many others) - link.

We need to evaluate PGO's applicability to Pika. And if it helps to achieve better performance - add a note to the documentation about that. In this case, users and maintainers will be aware of another optimization opportunity for Pika. Also, PGO integration into the build scripts can help users and maintainers easily apply PGO for their own workloads.

After PGO, I can suggest evaluating LLVM BOLT as an additional optimization step after PGO.

If you already tested PGO on Pika - could you please share the current status with the performance results?

Thanks in advance!

sorry, current we focus on server stable and dev-ops building, PGO is move to next year, when server is robustness enough

[AlexStocks]

@zamazan4ik If you have some suggestions, you can left them here.

If you would like to add PGO for PIKA and submit your PR, our community appreciate your great work.

First of all, thank you.