Java on CRaC: Superfast JVM Application Startup by Simon Ritter

Java on CRaC: Discover how the JVM's startup process can be accelerated, leveraging AOT and JIT compilation, coordinated restore, and runtime optimization techniques for faster application startup and improved overall performance.

Key takeaways

The JVM’s startup process involves three phases: parsing, compilation, and execution.
Deoptimizations can occur when the JVM’s assumptions about the code are proven wrong, leading to performance issues.
Ahead-of-time (AOT) compilation can improve performance by compiling code beforehand, but it can lead to larger executables.
Just-In-Time (JIT) compilation can also improve performance by compiling frequently executed code at runtime.
The JVM can take advantage of compiler optimization techniques such as monomorphic site inlining and branch analysis.
The CRaC project aims to improve JVM performance by reducing startup time and increasing overall performance.
CRaC uses a technique called “coordinated restore” to quickly resume an application after a checkpoint.
The JVM can benefit from being made aware of when an application is being restarted, allowing it to optimize its behavior accordingly.
The JVM’s performance warm-up process involves multiple stages, including parsing, compilation, and execution.
Further optimization techniques can be applied at runtime, such as profiling and speculative optimization.
The JVM’s ability to adapt to changing profiling patterns can lead to improved performance over time.
Java’s popularity can be attributed to its vast range of libraries and frameworks, as well as its strong backwards compatibility.
Java’s platform independence allows code to be written once and run on any platform without modification.

Java on CRaC: Superfast JVM Application Startup by Simon Ritter

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