Fast & Non-blocking Clojure wrapper for Undertow.
STATUS: Pre-alpha, in design and prototyping phase.
(require '[pohjavirta.server :as server])
(require '[jsonista.core :as j])
(defn handler [_]
{:status 200
:headers {"Content-Type" "application/json"}
:body (j/write-value-as-bytes {:message "hello"})})
;; create and start the server
(-> #'handler server/create server/start)By default, the server listens to localhost on port 8080. Trying with HTTPie:
➜ ~ http :8080
HTTP/1.1 200 OK
Content-Length: 19
Content-Type: application/json
Date: Sun, 29 Sep 2019 17:50:17 GMT
Server: pohjavirta
{
"message": "hello"
}Let's run some load with wrk:
➜ ~ wrk -t2 -c16 -d10s http://127.0.0.1:8080
Running 10s test @ http://127.0.0.1:8080
2 threads and 16 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 106.47us 52.47us 3.20ms 98.73%
Req/Sec 70.89k 2.49k 75.84k 79.21%
1424471 requests in 10.10s, 199.70MB read
Requests/sec: 141036.08
Transfer/sec: 19.77MBAsync responses, using promesa:
(require '[promesa.core :as p])
(defn handler [_]
(-> (a/promise {:message "async"})
(a/then (fn [message]
{:status 200,
:headers {"Content-Type" "application/json"}
:body (j/write-value-as-bytes message)}))))We redefined the handler, so no need to restart the server:
➜ ~ http :8080
HTTP/1.1 200 OK
Content-Length: 19
Content-Type: application/json
Date: Sun, 29 Sep 2019 18:00:35 GMT
Server: pohjavirta
{
"message": "async"
}Performance is still good:
➜ ~ wrk -t2 -c16 -d10s http://127.0.0.1:8080
Running 10s test @ http://127.0.0.1:8080
2 threads and 16 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 106.86us 33.93us 2.15ms 94.69%
Req/Sec 70.41k 2.38k 78.25k 76.24%
1414188 requests in 10.10s, 198.26MB read
Requests/sec: 140017.14
Transfer/sec: 19.63MBWIP. See issues for Roadmap.
Copyright © 2019 Metosin Oy
Distributed under the Eclipse Public License, the same as Clojure.