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Spring CustomHttpClient for RestTemplate

Benchmark Results of Http Client Tuning

JDK Client

$ wrk -d 60 -t 200 -c 300 http://localhost:8081/default
Running 1m test @ http://localhost:8081/default
  200 threads and 300 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   428.28ms  197.76ms   1.99s    90.31%
    Req/Sec     2.23      0.79     5.00     83.94%
  28137 requests in 1.00m, 12.67MB read
  Socket errors: connect 0, read 0, write 0, timeout 41
Requests/sec:    468.06
Transfer/sec:    215.81KB

Apache Client

$ wrk -d 60 -t 200 -c 300 http://localhost:8081/apache
Running 1m test @ http://localhost:8081/apache
  200 threads and 300 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   419.24ms  193.38ms   2.00s    88.88%
    Req/Sec     2.32      0.79     5.00     85.59%
  28635 requests in 1.00m, 12.89MB read
  Socket errors: connect 0, read 0, write 0, timeout 41
Requests/sec:    476.37
Transfer/sec:    219.64KB

Apache Client via Spring Cloud Commons

$ wrk -d 60 -t 200 -c 300 http://localhost:8081/apachespring
Running 1m test @ http://localhost:8081/apachespring
  200 threads and 300 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   423.83ms  215.93ms   2.00s    89.00%
    Req/Sec     2.35      0.83     5.00     83.71%
  28460 requests in 1.00m, 12.81MB read
  Socket errors: connect 0, read 0, write 0, timeout 56
  Non-2xx or 3xx responses: 1
Requests/sec:    473.47
Transfer/sec:    218.30KB

OkHttpClient via Spring Cloud Commons

$ wrk -d 60 -t 200 -c 300 http://localhost:8081/ok
Running 1m test @ http://localhost:8081/ok
  200 threads and 300 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   377.16ms  175.46ms   1.99s    91.24%
    Req/Sec     2.64      0.73     5.00     88.59%
  32005 requests in 1.00m, 14.41MB read
  Socket errors: connect 0, read 0, write 0, timeout 50
  Non-2xx or 3xx responses: 3
Requests/sec:    531.75
Transfer/sec:    245.16KB