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https://issues.apache.org/jira/browse/KAFKA-2561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16483042#comment-16483042
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Ismael Juma commented on KAFKA-2561:
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[~prasincs], given the improvement in Java 9, this work seems less appealing.
The blog post from [~jaikiran] has some numbers. Even though OpenSSL is a bit
faster in some cases still, the gap has narrowed considerably.
> Optionally support OpenSSL for SSL/TLS
> ---------------------------------------
>
> Key: KAFKA-2561
> URL: https://issues.apache.org/jira/browse/KAFKA-2561
> Project: Kafka
> Issue Type: New Feature
> Components: security
> Affects Versions: 0.9.0.0
> Reporter: Ismael Juma
> Priority: Major
>
> JDK's `SSLEngine` is unfortunately a bit slow (KAFKA-2431 covers this in more
> detail). We should consider supporting OpenSSL for SSL/TLS. Initial
> experiments on my laptop show that it performs a lot better:
> {code}
> start.time, end.time, data.consumed.in.MB, MB.sec, data.consumed.in.nMsg,
> nMsg.sec, config
> 2015-09-21 14:41:58:245, 2015-09-21 14:47:02:583, 28610.2295, 94.0081,
> 30000000, 98574.6111, Java 8u60/server auth JDK
> SSLEngine/TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
> 2015-09-21 14:38:24:526, 2015-09-21 14:40:19:941, 28610.2295, 247.8900,
> 30000000, 259931.5514, Java 8u60/server auth
> OpenSslEngine/TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
> 2015-09-21 14:49:03:062, 2015-09-21 14:50:27:764, 28610.2295, 337.7751,
> 30000000, 354182.9000, Java 8u60/plaintext
> {code}
> Extracting the throughput figures:
> * JDK SSLEngine: 94 MB/s
> * OpenSSL SSLEngine: 247 MB/s
> * Plaintext: 337 MB/s (code from trunk, so no zero-copy due to KAFKA-2517)
> In order to get these figures, I used Netty's `OpenSslEngine` by hacking
> `SSLFactory` to use Netty's `SslContextBuilder` and made a few changes to
> `SSLTransportLayer` in order to workaround differences in behaviour between
> `OpenSslEngine` and JDK's SSLEngine (filed
> https://github.com/netty/netty/issues/4235 and
> https://github.com/netty/netty/issues/4238 upstream).
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