[nginx] performance tuning nginx config

[mikz]

• enable PCRE JIT
• decrease timer resolution

Before

Running 5m test @ http://localhost:8080/?user_key=foo
  10 threads and 100 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    35.62ms   43.91ms   1.17s    96.23%
    Req/Sec   330.45    119.79     1.43k    60.45%
  978844 requests in 5.00m, 350.02MB read
Requests/sec:   3262.07
Transfer/sec:      1.17MB

After

Running 5m test @ http://localhost:8080/?user_key=foo
  10 threads and 100 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    30.21ms   28.69ms   1.22s    96.09%
    Req/Sec   360.57    111.95     0.94k    60.84%
  1071946 requests in 5.00m, 383.31MB read
Requests/sec:   3571.97
Transfer/sec:      1.28MB

---

Looks like 10% increase.

[davidor]

It would be interesting to measure the performance improvement.
The benchmark task says 1.8krps vs 4.8krps. I don't think it can be trusted :)

[davidor]

👍
Remember to solve the changelog conflicts before merging.