doc(readme): add Travis badge, fix latency measurements being too high (should have half RTT)

cmd/bench/main.go

@@ -92,7 +92,7 @@ func BenchmarkLatency() {
 			atomic.StoreInt64(&stopped, 1)
 			wg.Wait()
 
-			final := float64(latency/int64(time.Microsecond)) / float64(samples)
+			final := float64(latency/int64(time.Microsecond)) / float64(samples) / 2
 			fmt.Printf("clients=%d, payload=%db, latency=%.1fus\n", clientsCount, len(payload), final)
 		}
 

readme.md

@@ -1,4 +1,4 @@
-# wsplice
+# wsplice [![Build Status](https://travis-ci.org/mixer/wsplice.svg?branch=master)](https://travis-ci.org/mixer/wsplice)
 
 `wsplice` is a websocket multiplexer, allowing you to connect to multiple remote hosts though a single websocket.
 
@@ -13,7 +13,7 @@ Download a binary from the [Releases page](https://github.com/mixer/wsplice/rele
     --tls-ca=my-ca.pem \
     --listen=0.0.0.0:3000
 
-# Omit the CA cert to run it over TLS, and allow it to connect 
+# Omit the CA cert to run it over TLS, and allow it to connect
 # to example.com and ws.example.com
 ./wsplice --tls-cert=my-cert.pem \
     --tls-key=my-key.pem \
@@ -22,7 +22,7 @@ Download a binary from the [Releases page](https://github.com/mixer/wsplice/rele
 
 ### Protocol
 
-Websocket frames are prefixed with two bytes, as a big endian uint16, to describe who that message goes to. The magic control index is `[0xff, 0xff]`, which is a simple JSON RPC tool. To connect to another server, you might do something like this in Node.js:
+Websocket frames are prefixed with two bytes, as a big endian uint16, to describe who that message goes to. The magic control index is `[0xff, 0xff]`, which is a simple JSON RPC protocol. To connect to another server, you might do something like this in Node.js:
 
 ```js
 const payload = Buffer.concat([
@@ -80,9 +80,9 @@ Once the client disconnects, the wsplice will call `onSocketDisconnect`. For exa
 | clients=32  | 231 mbps    | 235 mbps     | 2940 mbps     | 11200 mbps    |
 | clients=128 | 327 mbps    | 333 mbps     | 2520 mbps     | 14600 mbps    |
 | clients=512 | 46.3 mbps   | 533 mbps     | 3570 mbps     | 11200 mbps    |
-| Latency     |             |              |               |               |
-| clients=32  | 11.2μs      | 9.2μs        | 10.7μs        | 14.8μs        |
-| clients=128 | 9.3μs       | 10.4μs       | 11.4μs        | 11.3μs        |
-| clients=512 | 7.3μs       | 7.9μs        | 10.3μs        | 14.2μs        |
+| **Latency** |             |              |               |               |
+| clients=32  | 5.6μs       | 4.6μs        | 5.4μs         | 7.4μs         |
+| clients=128 | 4.7μs       | 5.2μs        | 5.7μs         | 5.7μs         |
+| clients=512 | 3.7μs       | 4.0μs        | 5.2μs         | 7.1μs         |
 
-These measurements were taken on an B8 Azure VM using the binary in `./cmd/bench`.
+These measurements were taken on an B8 Azure VM running Ubuntu 16.04, using the binary in `./cmd/bench`.