Initialize Once, Start Fast: Application Initialization at Build Time
Arbitrary program extension at run time in language-based VMs, e.g., Java’s dynamic class loading, comes at a startup cost: high memory footprint and slow warmup. Cloud computing amplifies the startup overhead. Microservices and serverless cloud functions lead to small, self-contained applications that are started often. Slow startup and high memory footprint directly affect the cloud hosting costs, and slow startup can also break service-level agreements. Many applications are limited to a prescribed set of pre-tested classes, i.e., use a closed-world assumption at deployment time. For such Java applications, we produce Native Images with fast startup and stable performance.