Talk proposal: Optimizing Errors Away

[Volker Simonis]

Title:

Optimizing Errors Away

Abstract:

The HotSpot JIT compilers use a lot of sophisticated
optimization techniques to speed up your Java code. Sometimes, these
advanced optimizations are so aggressive that they may eliminate
required checks by mistake and therefore suppress expected
program errors.

In this talk, I'll briefly introduce Escape Analysis and Intrinsics,
two commonly used HotSpot optimization techniques. I'll show how a
combination of these two features can optimize away
IndexOutOfBoundsExceptions in some corner cases where they are
required by the standard and how I fixed this error in recent versions
of the OpenJDK.

Bio:

Volker Simonis works in SAP JVM Technology group. He is an
OpenJDK contributor from the very beginning and helped SAP engage
in the OpenJDK project. He's the project lead of the OpenJDK
PowerPC/AIX and s390x porting projects, a JDK9 reviewer and JCP
Executive Committee representative for SAP.

Recording me on audio/video is acceptable under a CC-BY-2.0 license.

Thank you and best regards,
Volker