Performance degradation in SslContextBuilder.build() on Java 11 for mTLS connections

Expected behavior

When we build an SslContext for a Client using SslContextBuilder, no matter the parameters we set for the builder, running it on Java 11 takes 2x or 3x more time than on Java 8.

An average of 30 runs of the below code on Java 8 shows an average of 500 ms, when the same is run on JDK11, it takes up to 1500 ms.

Actual behavior

Ideally Java 11 and Java 8 performance should be similar.

Minimal yet complete reproducer code (or URL to code)

SslContextBuilder sslContextBuilder = SslContextBuilder.forClient()
                    .trustManager(rootCACert)
                    .ciphers(null)
                    .sessionCacheSize(0)
                    .sessionTimeout(0)
                    .sslProvider(SslProvider.OPENSSL) // or SslProvider.JDK, doesn't matter
                    .clientAuth(ClientAuth.REQUIRE);

sslContextBuilder.build();

Netty version

4.1.50.Final, 4.1.64.Final

JVM version (e.g. java -version)

openjdk1.8.0_172, openjdk_11.0.8_11.41.54

OS version (e.g. uname -a)

MacOS 19.6.0 Darwin Kernel

[hyperxpro]

Well, this one fell off my radar. I will get back by this weekend with some updates.

[normanmaurer]

Anyone did investigate this yet ?