Improve performance

.taprc

@@ -1,4 +1,2 @@
-ts: false
-jsx: false
-flow: false
-coverage: true
+files:
+  - test/**/*.test.js

README.md

@@ -34,10 +34,9 @@ returned.
 
 ```js
 proxyaddr(req, function (addr) { return addr === '127.0.0.1' })
-proxyaddr(req, function (addr, i) { return i < 1 })
 ```
 
-The `trust` arugment may also be a single IP address string or an
+The `trust` argument may also be a single IP address string or an
 array of trusted addresses, as plain IP addresses, CIDR-formatted
 strings, or IP/netmask strings.
 

benchmark/compiling.js

@@ -1,3 +1,4 @@
+'use strict'
 
 /**
  * Globals for benchmark.js

benchmark/kind.js

@@ -1,3 +1,4 @@
+'use strict'
 
 /**
  * Globals for benchmark.js

benchmark/matching.js

@@ -1,3 +1,4 @@
+'use strict'
 
 /**
  * Globals for benchmark.js

benchmark/prefix-length-from-subnet-mask.js

@@ -0,0 +1,25 @@
+'use strict'
+
+/**
+ * Globals for benchmark.js
+ */
+const { prefixLengthFromSubnetMask } = require('../lib/prefix-length-from-subnet-mask')
+
+/**
+ * Module dependencies.
+ */
+const benchmark = require('benchmark')
+
+const suite = new benchmark.Suite()
+
+const ip = '255.255.254.0'
+
+suite.add('prefixLengthFromSubnetMask', function () {
+  prefixLengthFromSubnetMask(ip)
+})
+
+suite.on('cycle', function onCycle (event) {
+  console.log(String(event.target))
+})
+
+suite.run({ async: false })