Tidy up documentation.

Author: ioquatix

guides/getting-started/readme.md

@@ -17,14 +17,10 @@ $ bundle add async-dns
 Here is a simple example showing how to use the resolver:
 
 ``` ruby
-Async do
-	resolver = Async::DNS::System.resolver
-	
-	addresses = resolver.addresses_for("www.google.com.")
-	
-	puts addresses.inspect
-end
-# [#<Resolv::IPv4 202.124.127.240>, #<Resolv::IPv4 202.124.127.216>, #<Resolv::IPv4 202.124.127.223>, #<Resolv::IPv4 202.124.127.227>, #<Resolv::IPv4 202.124.127.234>, #<Resolv::IPv4 202.124.127.230>, #<Resolv::IPv4 202.124.127.208>, #<Resolv::IPv4 202.124.127.249>, #<Resolv::IPv4 202.124.127.219>, #<Resolv::IPv4 202.124.127.218>, #<Resolv::IPv4 202.124.127.212>, #<Resolv::IPv4 202.124.127.241>, #<Resolv::IPv4 202.124.127.238>, #<Resolv::IPv4 202.124.127.245>, #<Resolv::IPv4 202.124.127.251>, #<Resolv::IPv4 202.124.127.229>]
+resolver = Async::DNS::System.resolver
+
+resolver.addresses_for("www.google.com.")
+# => [#<Resolv::IPv4 172.217.167.100>, #<Resolv::IPv6 2404:6800:4006:809::2004>]
 ```
 
 ### Server
@@ -54,55 +50,3 @@ server.run
 Then to test you could use `dig` like so:
 
     dig @localhost -p 5300 google.com
-
-## FAQ
-
-### File Handle Limitations
-
-I get the error `Errno::EMFILE: Too many open files - socket(2) - udp` when trying to run a server. What should I do?
-
-On some platforms (e.g. Mac OS X) the number of file descriptors is relatively low by default and should be increased by calling `ulimit -n 10000` before running tests or even before starting a server which expects a large number of concurrent incoming connections.
-
-### Server
-
-The performance is on the same magnitude as `bind9`. Some basic benchmarks resolving 1000 names concurrently, repeated 5 times, using `Async::DNS::Resolver` gives the following:
-
-``` 
-                              user     system      total        real
-Async::DNS::Server         4.280000   0.450000   4.730000 (  4.854862)
-Bind9                         4.970000   0.520000   5.490000 (  5.541213)
-```
-
-These benchmarks are included in the unit tests. To test bind9 performance, it must be installed and `which named` must return the executable.
-
-## Performance
-
-We welcome additional benchmarks and feedback regarding Async::DNS performance. To check the current performance results, consult the [travis build job output](https://travis-ci.org/socketry/async-dns).
-
-### Resolver
-
-The `Async::DNS::Resolver` is highly concurrent and can resolve individual names as fast as the built in `Resolv::DNS` resolver. Because the resolver is asynchronous, when dealing with multiple names, it can work more efficiently:
-
-``` 
-                              user     system      total        real
-Async::DNS::Resolver       0.020000   0.010000   0.030000 (  0.030507)
-Resolv::DNS                   0.070000   0.010000   0.080000 (  1.465975)
-```
-
-These benchmarks are included in the unit tests.
-
-### Server
-
-The performance is on the same magnitude as `bind9`. Some basic benchmarks resolving 1000 names concurrently, repeated 5 times, using `Async::DNS::Resolver` gives the following:
-
-``` 
-                              user     system      total        real
-Async::DNS::Server         4.280000   0.450000   4.730000 (  4.854862)
-Bind9                         4.970000   0.520000   5.490000 (  5.541213)
-```
-
-These benchmarks are included in the unit tests. To test bind9 performance, it must be installed and `which named` must return the executable.
-
-### DNSSEC support
-
-DNSSEC is currently not supported and is [unlikely to be supported in the future](http://sockpuppet.org/blog/2015/01/15/against-dnssec/). Feel free to submit a PR.

lib/async/dns/endpoint.rb

@@ -7,6 +7,7 @@
 
 module Async
 	module DNS
+		# DNS endpoint helpers.
 		module Endpoint
 			# Get a list of standard nameserver connections which can be used for querying any standard servers that the system has been configured with.
 			def self.for(nameservers, port: 53, **options)

lib/async/dns/resolver.rb

@@ -185,7 +185,7 @@ def dispatch_query(name, resource_class)
 		end
 
 		# Send the message to available servers. If no servers respond correctly, nil is returned. This result indicates a failure of the resolver to correctly contact any server and get a valid response.
-		def dispatch_request(message, parent: Async::Task.current)
+		def dispatch_request(message)
 			request = Request.new(message, @endpoint)
 			error = nil