Getting IP is slow

Hi, I'm UltimateExpress creator. I've decided to move this to a separate issue. Here's a benchmark of UltimateExpress that returns "Hello world": ``` wrk http://localhost:13333/ -d 30 -t 1 -c 200 Running 30s test @ http://localhost:13333/ 1 threads and 200 connections Thread Stats Avg Stdev Max +/- Stdev Latency 2.84ms 512.94us 26.13ms 94.46% Req/Sec 70.91k 5.30k 83.20k 87.00% 2115784 requests in 30.01s, 415.66MB read Requests/sec: 70504.66 Transfer/sec: 13.85MB ``` And here's same thing but with IP being read once using `getRemoteAddress()`: ``` wrk http://localhost:13333/ -d 30 -t 1 -c 200 Running 30s test @ http://localhost:13333/ 1 threads and 200 connections Thread Stats Avg Stdev Max +/- Stdev Latency 3.40ms 488.65us 27.40ms 93.50% Req/Sec 59.16k 3.65k 67.21k 88.00% 1765220 requests in 30.01s, 400.66MB read Requests/sec: 58822.26 Transfer/sec: 13.35MB ``` Around 12k req/sec reduction. And when using `getRemoteAddressAsText()`, it's even worse: ``` wrk http://localhost:13333/ -d 30 -t 1 -c 200 Running 30s test @ http://localhost:13333/ 1 threads and 200 connections Thread Stats Avg Stdev Max +/- Stdev Latency 3.49ms 565.67us 23.14ms 93.83% Req/Sec 57.65k 4.07k 66.79k 90.67% 1721099 requests in 30.02s, 359.46MB read Requests/sec: 57336.60 Transfer/sec: 11.98MB ```