|  Version: 9.4.0.M0 | 
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To test a Jetty release, complete the following steps for each release you want to test:
Download the staged release:
wget https://oss.sonatype.org/content/repositories/jetty-[reponumber]/org/eclipse/jetty/jetty-distribution/[jetty-version]/jetty-distribution-9.[jetty-minor-version].tar.gz
Start jetty:
cd [installdir] ; java -jar start.jar
test.war webapp.Verify that hot deployment works.
cd [installdir] ; touch [pathToJettyDistribution]/webapps.demo/test.xml
test.war gets redeployed in STDOUT.Verify that the spdy example webapp and spdy-proxy do work
cd jetty_src/jetty-spdy/spdy-example-webapp mvn jetty:run-forked
Stop the server with CTRL+C and restart it in proxy mode:
mvn -Pproxy jetty:run-forked
Clone CometD.
clone git://github.com/cometd/cometd.git git clone git://github.com/cometd/cometd.git
Edit pom.xml and update jetty-version.
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <jetty-version>7.6.2.v20120308</jetty-version>
        <jetty-plugin-version>${jetty-version}</jetty-plugin-version>
        <slf4j-version>1.6.4</slf4j-version>
        <spring-version>3.1.0.RELEASE</spring-version>
    </properties>
    <repositories>
    <repository>
      <id>Jetty Staging</id>
      <url>https://oss.sonatype.org/content/repositories/jetty-988/</url>
    </repository>
  </repositories>Build Cometd:
mvn clean install
Make sure that the performance results are reasonably fast. On a MacBook Pro i7 2.6ghz dualcore produces the following:
 ========================================
Statistics Started at Fri Mar 09 13:44:35 CET 2012
Operative System: Mac OS X 10.7.3 amd64
JVM : Oracle Corporation Java HotSpot(TM) 64-Bit Server VM runtime 23.0-b16 1.7.0_04-ea-b14
Processors: 4
System Memory: 99.583336% used of 30.0 GiB
Used Heap Size: 36.490677 MiB
Max Heap Size: 1920.0 MiB
Young Generation Heap Size: 896.0 MiB
- - - - - - - - - - - - - - - - - - - -
Testing 1000 clients in 100 rooms, 10 rooms/client
Sending 1000 batches of 10x50 bytes messages every 10000 ?s
[GC [PSYoungGen: 786432K->8736K(917504K)] 823650K->45954K(1966080K), 0.0309940 secs] [Times: user=0.09 sys=0.00, real=0.03 secs]
[GC [PSYoungGen: 795168K->11424K(917504K)] 832386K->48642K(1966080K), 0.0513360 secs] [Times: user=0.13 sys=0.00, real=0.05 secs]
[GC [PSYoungGen: 797856K->14560K(917504K)] 835074K->51778K(1966080K), 0.0432940 secs] [Times: user=0.12 sys=0.00, real=0.05 secs]
[GC [PSYoungGen: 800992K->15680K(917504K)] 838210K->52898K(1966080K), 0.0491200 secs] [Times: user=0.14 sys=0.00, real=0.05 secs]
[GC [PSYoungGen: 802112K->17568K(917504K)] 839330K->54786K(1966080K), 0.0484950 secs] [Times: user=0.14 sys=0.00, real=0.05 secs]
[GC [PSYoungGen: 804000K->17600K(917504K)] 841218K->54818K(1966080K), 0.0456460 secs] [Times: user=0.14 sys=0.01, real=0.05 secs]
[GC [PSYoungGen: 804032K->19488K(917504K)] 841250K->56706K(1966080K), 0.0542000 secs] [Times: user=0.15 sys=0.00, real=0.05 secs]
[GC [PSYoungGen: 805920K->20224K(917504K)] 843138K->57442K(1966080K), 0.0486350 secs] [Times: user=0.16 sys=0.00, real=0.05 secs]
[GC [PSYoungGen: 806656K->20192K(917504K)] 843874K->57410K(1966080K), 0.0566690 secs] [Times: user=0.15 sys=0.00, real=0.06 secs]
[GC [PSYoungGen: 806624K->21152K(917504K)] 843842K->58370K(1966080K), 0.0536740 secs] [Times: user=0.16 sys=0.00, real=0.06 secs]
[GC [PSYoungGen: 807584K->21088K(917504K)] 844802K->58306K(1966080K), 0.0576060 secs] [Times: user=0.18 sys=0.00, real=0.06 secs]
[GC [PSYoungGen: 807520K->22080K(917504K)] 844738K->59298K(1966080K), 0.0663300 secs] [Times: user=0.19 sys=0.01, real=0.06 secs]
- - - - - - - - - - - - - - - - - - - -
Statistics Ended at Fri Mar 09 13:45:21 CET 2012
Elapsed time: 45826 ms
    Time in JIT compilation: 52 ms
    Time in Young Generation GC: 606 ms (12 collections)
    Time in Old Generation GC: 0 ms (0 collections)
Garbage Generated in Young Generation: 9036.513 MiB
Garbage Generated in Survivor Generation: 21.65625 MiB
Garbage Generated in Old Generation: 0.0 MiB
Average CPU Load: 156.54865/400
----------------------------------------
Outgoing: Elapsed = 45820 ms | Rate = 218 messages/s - 21 requests/s - ~0.083 Mib/s
Waiting for messages to arrive 996960/999045
All messages arrived 999045/999045
Messages - Success/Expected = 999045/999045
Incoming - Elapsed = 45945 ms | Rate = 21743 messages/s - 9496 responses/s(43.68%) - ~8.295 Mib/s
Messages - Wall Latency Distribution Curve (X axis: Frequency, Y axis: Latency):
 @                    _  24 ms (8765, 0.88%)
       @              _  45 ms (58952, 5.90%)
          @           _  67 ms (87065, 8.71%)
             @        _  88 ms (113786, 11.39%)
                   @  _  109 ms (167426, 16.76%)
                   @  _  131 ms (176163, 17.63%) ^50%
              @       _  152 ms (123182, 12.33%)
          @           _  174 ms (90918, 9.10%)
        @             _  195 ms (67209, 6.73%) ^85%
     @                _  216 ms (46989, 4.70%)
   @                  _  238 ms (24975, 2.50%) ^95%
  @                   _  259 ms (16509, 1.65%)
 @                    _  281 ms (8454, 0.85%) ^99%
@                     _  302 ms (4324, 0.43%)
@                     _  323 ms (2955, 0.30%)
@                     _  345 ms (957, 0.10%) ^99.9%
@                     _  366 ms (204, 0.02%)
@                     _  388 ms (144, 0.01%)
@                     _  409 ms (25, 0.00%)
@                     _  430 ms (43, 0.00%)
Messages - Wall Latency 50th%/99th% = 117/275 ms
Messages - Wall Latency Min/Ave/Max = 2/123/430 ms
Messages - Network Latency Min/Ave/Max = 1/114/417 ms
Thread Pool - Concurrent Threads max = 239 | Queue Size max = 1002 | Queue Latency avg/max = 12/101 msDeploy cometd.war to the webapps directory of the jetty-distribution tested above.
cp cometd-demo/target/cometd-demo-[version].war [pathToJetty]/jetty-distribution-[jetty-version]/webapps/
Start jetty and make sure there are no exceptions.
cd [pathToJetty] && java -jar start.jar
Go through all pages of the demo and test them:
http://localhost:8080/cometd-demo-2.4.1-SNAPSHOT/
If all tests are green, you are done!