利用siege测了一下单机JFinal框架+undertow的的性能，也不知道下面的结果到底算是性能如何呢？  为了测最快速度，我只写了一个controller的method直接返回renderNull();

gary@ubuntu18$ siege -c1000 -r100 http://127.0.0.1:8000/mock/siege

** SIEGE 4.0.4

** Preparing 1000 concurrent users for battle.

The server is now under siege...

Transactions:       100000 hits

Availability:       100.00 %

Elapsed time:        19.29 secs

Data transferred:         0.00 MB

Response time:         0.18 secs

Transaction rate:      5184.03 trans/sec

Throughput:         0.00 MB/sec

Concurrency:       929.95

Successful transactions:      100000

Failed transactions:            0

Longest transaction:         2.11

Shortest transaction:         0.00

gary@ubuntu18$ siege -c1000 -r200 http://127.0.0.1:8000/mock/siege

** SIEGE 4.0.4

** Preparing 1000 concurrent users for battle.

The server is now under siege...

Transactions:       200000 hits

Availability:       100.00 %

Elapsed time:        40.25 secs

Data transferred:         0.00 MB

Response time:         0.19 secs

Transaction rate:      4968.94 trans/sec

Throughput:         0.00 MB/sec

Concurrency:       947.82

Successful transactions:      200000

Failed transactions:            0

Longest transaction:         2.36

Shortest transaction:         0.00

另外也调了了一下undertow的ioThread以及workerThread， 基本ioThread最好状态是在 cpu核数×2的数值上， workerThread不宜超过500