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Carl Mastrangelo e96c37dea7 Disable Huffman encoding for small headers (#9260) 
Motivation:

Huffman coding saves only a little space, but has a huge CPU cost

Modification:

Disable huff coding for headers smaller than 512 bytes.  Also, add a
configurable limit to the encoder.

Result:

Faster HPACK

BEFORE:
```
Benchmark                     (duplicates)  (limitToAscii)  (sensitive)  (size)  Mode  Cnt       Score       Error  Units
HpackEncoderBenchmark.encode          true            true         true   SMALL  avgt   10    2572.595 ±    16.184  ns/op
HpackEncoderBenchmark.encode          true            true         true  MEDIUM  avgt   10   19580.815 ±   397.780  ns/op
HpackEncoderBenchmark.encode          true            true         true   LARGE  avgt   10  379456.381 ±  2059.919  ns/op
HpackEncoderBenchmark.encode          true            true        false   SMALL  avgt   10     730.579 ±     8.116  ns/op
HpackEncoderBenchmark.encode          true            true        false  MEDIUM  avgt   10    2087.590 ±    84.644  ns/op
HpackEncoderBenchmark.encode          true            true        false   LARGE  avgt   10   11725.228 ±    89.298  ns/op
HpackEncoderBenchmark.encode          true           false         true   SMALL  avgt   10     555.971 ±     5.120  ns/op
HpackEncoderBenchmark.encode          true           false         true  MEDIUM  avgt   10    2831.874 ±    41.801  ns/op
HpackEncoderBenchmark.encode          true           false         true   LARGE  avgt   10   36054.025 ±   179.504  ns/op
HpackEncoderBenchmark.encode          true           false        false   SMALL  avgt   10     340.337 ±     3.313  ns/op
HpackEncoderBenchmark.encode          true           false        false  MEDIUM  avgt   10    1006.817 ±     8.942  ns/op
HpackEncoderBenchmark.encode          true           false        false   LARGE  avgt   10    8784.168 ±   164.014  ns/op
HpackEncoderBenchmark.encode         false            true         true   SMALL  avgt   10    2561.934 ±    27.056  ns/op
HpackEncoderBenchmark.encode         false            true         true  MEDIUM  avgt   10   22061.105 ±   154.533  ns/op
HpackEncoderBenchmark.encode         false            true         true   LARGE  avgt   10  435744.897 ±  8853.388  ns/op
HpackEncoderBenchmark.encode         false            true        false   SMALL  avgt   10    2737.683 ±    47.142  ns/op
HpackEncoderBenchmark.encode         false            true        false  MEDIUM  avgt   10   22385.146 ±    98.430  ns/op
HpackEncoderBenchmark.encode         false            true        false   LARGE  avgt   10  408159.698 ± 12044.931  ns/op
HpackEncoderBenchmark.encode         false           false         true   SMALL  avgt   10     544.213 ±     3.279  ns/op
HpackEncoderBenchmark.encode         false           false         true  MEDIUM  avgt   10    2908.978 ±    31.026  ns/op
HpackEncoderBenchmark.encode         false           false         true   LARGE  avgt   10   36471.262 ±  1044.010  ns/op
HpackEncoderBenchmark.encode         false           false        false   SMALL  avgt   10     609.305 ±     4.371  ns/op
HpackEncoderBenchmark.encode         false           false        false  MEDIUM  avgt   10    3223.946 ±    23.505  ns/op
HpackEncoderBenchmark.encode         false           false        false   LARGE  avgt   10   39975.152 ±   655.196  ns/op
```

AFTER:
```
NEW AFTER

Benchmark                     (duplicates)  (limitToAscii)  (sensitive)  (size)  Mode  Cnt     Score     Error  Units
HpackEncoderBenchmark.encode          true            true         true   SMALL  avgt    5   379.473 ± 133.815  ns/op
HpackEncoderBenchmark.encode          true            true         true  MEDIUM  avgt    5  1118.772 ±  89.258  ns/op
HpackEncoderBenchmark.encode          true            true         true   LARGE  avgt    5  5366.828 ±  89.746  ns/op
HpackEncoderBenchmark.encode          true            true        false   SMALL  avgt    5   284.401 ±   2.088  ns/op
HpackEncoderBenchmark.encode          true            true        false  MEDIUM  avgt    5   922.805 ±  10.796  ns/op
HpackEncoderBenchmark.encode          true            true        false   LARGE  avgt    5  8727.831 ± 462.138  ns/op
HpackEncoderBenchmark.encode          true           false         true   SMALL  avgt    5   337.093 ±  22.585  ns/op
HpackEncoderBenchmark.encode          true           false         true  MEDIUM  avgt    5   693.689 ±  16.351  ns/op
HpackEncoderBenchmark.encode          true           false         true   LARGE  avgt    5  5616.786 ±  98.647  ns/op
HpackEncoderBenchmark.encode          true           false        false   SMALL  avgt    5   286.708 ±  13.765  ns/op
HpackEncoderBenchmark.encode          true           false        false  MEDIUM  avgt    5   906.279 ±  32.338  ns/op
HpackEncoderBenchmark.encode          true           false        false   LARGE  avgt    5  8304.736 ± 128.584  ns/op
HpackEncoderBenchmark.encode         false            true         true   SMALL  avgt    5   351.381 ±  15.547  ns/op
HpackEncoderBenchmark.encode         false            true         true  MEDIUM  avgt    5  1188.166 ±   7.023  ns/op
HpackEncoderBenchmark.encode         false            true         true   LARGE  avgt    5  6876.009 ±  48.117  ns/op
HpackEncoderBenchmark.encode         false            true        false   SMALL  avgt    5   434.759 ±   8.619  ns/op
HpackEncoderBenchmark.encode         false            true        false  MEDIUM  avgt    5   954.588 ±  58.514  ns/op
HpackEncoderBenchmark.encode         false            true        false   LARGE  avgt    5  8534.017 ± 552.597  ns/op
HpackEncoderBenchmark.encode         false           false         true   SMALL  avgt    5   223.713 ±   4.823  ns/op
HpackEncoderBenchmark.encode         false           false         true  MEDIUM  avgt    5  1181.538 ±  11.851  ns/op
HpackEncoderBenchmark.encode         false           false         true   LARGE  avgt    5  6670.830 ± 267.927  ns/op
HpackEncoderBenchmark.encode         false           false        false   SMALL  avgt    5   424.609 ±  27.477  ns/op
HpackEncoderBenchmark.encode         false           false        false  MEDIUM  avgt    5  1003.578 ±  53.991  ns/op
HpackEncoderBenchmark.encode         false           false        false   LARGE  avgt    5  8428.932 ± 102.838  ns/op
```
2019-07-01 21:10:33 +02:00
.github Use GitHub Issue/PR Template Feature 2016-12-07 11:40:26 -08:00
.mvn support publishing snapshots from docker based ci (#8634) 2018-12-07 06:16:39 +01:00
all Always include classes from all native transports no matter on which platfrom netty-all is build (#9111) 2019-04-30 23:24:14 +02:00
bom Remove OIO transport (and transports that depend on it). (#8580) 2018-11-21 15:23:18 +01:00
buffer Correctly take length of ByteBufInputStream into account for readLine… (#9310) 2019-07-01 20:55:47 +02:00
codec optimize some code (#9289) 2019-06-28 13:49:24 +02:00
codec-dns Add support for TCP fallback when we receive a truncated DnsResponse (#9139) 2019-05-17 14:47:10 +02:00
codec-haproxy HAProxyMessageDecoder not correctly handle delimiter in all cases (#9282) 2019-06-27 21:59:09 +02:00
codec-http Call to ‘asList’ with only one argument could be replaced with ‘singletonList’ (#9288) 2019-06-26 21:07:11 +02:00
codec-http2 Disable Huffman encoding for small headers (#9260) 2019-07-01 21:10:33 +02:00
codec-memcache codec-memcache: copy metadata in binary full request response (#9160) 2019-05-22 11:06:16 +02:00
codec-mqtt MqttConnectPayload.toString() should use Arrays.toString() instead of [].toString() (#9292) 2019-06-27 21:55:28 +02:00
codec-redis migrate java8: use requireNonNull (#8840) 2019-02-04 10:32:25 +01:00
codec-smtp SmtpRequestEncoderTest ByteBuf leak (#9075) 2019-04-19 08:47:28 +02:00
codec-socks migrate java8: use requireNonNull (#8840) 2019-02-04 10:32:25 +01:00
codec-stomp use checkPositive/checkPositiveOrZero (#8835) 2019-02-04 15:55:07 +01:00
codec-xml Update to new checkstyle plugin (#8777) 2019-01-24 16:24:19 +01:00
common optimize some code (#9289) 2019-06-28 13:49:24 +02:00
dev-tools Update version number to start working on Netty 5 2018-11-20 15:49:57 +01:00
docker Remove deprecated GraalVM native-image flags (#9118) 2019-05-22 19:22:03 +02:00
example All override methods must be added @override (#9285) 2019-06-27 13:52:06 +02:00
handler Don't loop over TLS records for SNI (#7479) 2019-07-01 11:23:31 +02:00
handler-proxy Remove code that accounts for changing EventExecutors in DefaultPromise (#8996) 2019-04-03 10:36:55 +02:00
license Updated jboss-marshalling dependency to current license (#9172) 2019-05-23 07:21:57 +02:00
microbench All override methods must be added @override (#9285) 2019-06-27 13:52:06 +02:00
resolver Close delegate resolver from RoundRobinInetAddressResolver (#9214) 2019-06-04 05:14:28 -07:00
resolver-dns Fix flaky DnsNameResolverTest.testTruncatedWithTcpFallback (#9262) 2019-06-21 09:29:15 +02:00
tarball Update version number to start working on Netty 5 2018-11-20 15:49:57 +01:00
testsuite Add support for loopbackmode and accessing the configured interface when using epoll native transport with multicast (#9218) 2019-06-07 13:45:45 -07:00
testsuite-autobahn Deprecate ChannelInboundHandlerAdapter and ChannelOutboundHandlerAdapter (#8929) 2019-03-13 09:46:10 +01:00
testsuite-http2 Deprecate ChannelInboundHandlerAdapter and ChannelOutboundHandlerAdapter (#8929) 2019-03-13 09:46:10 +01:00
testsuite-native-image remove unused imports (#9287) 2019-06-26 21:16:16 +02:00
testsuite-osgi Adjust testsuite-osgi to resolve bundles from local build (#8944) 2019-03-18 09:56:08 +01:00
testsuite-shading Use maven plugin to prevent API/ABI breakage as part of build process (#8904) 2019-03-01 19:48:29 +01:00
transport Motivation: 2019-07-01 20:48:01 +02:00
transport-native-epoll Unconditionally initialize sockaddrs in epoll linuxsocket (#9299) 2019-06-29 12:18:42 +02:00
transport-native-kqueue All override methods must be added @override (#9285) 2019-06-27 13:52:06 +02:00
transport-native-unix-common Added UDP multicast (with caveats: getInterface, getNetworkInterface, block or loopback-mode-disabled operations). 2019-05-25 10:06:13 +02:00
transport-native-unix-common-tests Merge ChannelInboundHandler and ChannelOutboundHandler into ChannelHa… (#8957) 2019-03-28 09:28:27 +00:00
transport-sctp Deprecate ChannelInboundHandlerAdapter and ChannelOutboundHandlerAdapter (#8929) 2019-03-13 09:46:10 +01:00
.fbprefs Updated Find Bugs configuration 2009-03-04 10:33:09 +00:00
.gitattributes Include mvn wrapper to make setup of development env easier 2018-01-26 08:13:17 +01:00
.gitignore Add .gitignore for docker-sync stuff 2019-03-19 14:04:21 +01:00
CONTRIBUTING.md Move the pull request guide to the developer guide 2014-03-12 13:13:58 +09:00
LICENSE.txt Relicensed to Apache License v2 2009-08-28 07:15:49 +00:00
mvnw Include mvn wrapper to make setup of development env easier 2018-01-26 08:13:17 +01:00
mvnw.cmd Include mvn wrapper to make setup of development env easier 2018-01-26 08:13:17 +01:00
NOTICE.txt Updated jboss-marshalling dependency to current license (#9172) 2019-05-23 07:21:57 +02:00
pom.xml Remove deprecated GraalVM native-image flags (#9118) 2019-05-22 19:22:03 +02:00
README.md Provide an Automatic-Module-Name for the netty-all artifact fixes #7644 2018-01-27 20:31:16 +01:00
run-example.sh Drop SPDY support (#8845) 2019-02-07 09:25:31 +01:00

README.md

Netty Project

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.

Links

How to build

For the detailed information about building and developing Netty, please visit the developer guide. This page only gives very basic information.

You require the following to build Netty:

Note that this is build-time requirement. JDK 5 (for 3.x) or 6 (for 4.0+) is enough to run your Netty-based application.

Branches to look

Development of all versions takes place in each branch whose name is identical to <majorVersion>.<minorVersion>. For example, the development of 3.9 and 4.0 resides in the branch '3.9' and the branch '4.0' respectively.

Usage with JDK 9

Netty can be used in modular JDK9 applications as a collection of automatic modules. The module names follow the reverse-DNS style, and are derived from subproject names rather than root packages due to historical reasons. They are listed below:

  • io.netty.all
  • io.netty.buffer
  • io.netty.codec
  • io.netty.codec.dns
  • io.netty.codec.haproxy
  • io.netty.codec.http
  • io.netty.codec.http2
  • io.netty.codec.memcache
  • io.netty.codec.mqtt
  • io.netty.codec.redis
  • io.netty.codec.smtp
  • io.netty.codec.socks
  • io.netty.codec.stomp
  • io.netty.codec.xml
  • io.netty.common
  • io.netty.handler
  • io.netty.handler.proxy
  • io.netty.resolver
  • io.netty.resolver.dns
  • io.netty.transport
  • io.netty.transport.epoll (native omitted - reserved keyword in Java)
  • io.netty.transport.kqueue (native omitted - reserved keyword in Java)
  • io.netty.transport.unix.common (native omitted - reserved keyword in Java)
  • io.netty.transport.rxtx
  • io.netty.transport.sctp
  • io.netty.transport.udt

Automatic modules do not provide any means to declare dependencies, so you need to list each used module separately in your module-info file.