Features
Sun's JRE features two virtual machines, one called Client and the other Server. The Client version is tuned for quick loading. It makes use of interpretation. The Server version loads more slowly, putting more effort into producing highly optimized JIT compilations, that yield higher performance. Both VMs compile only often-run methods, using a configurable invocation-count-threshold to decide which methods to compile.
The HotSpot Java virtual machine is written in C++. As stated on the HotSpot web page, the source contains approximately 250,000 lines of code. Hotspot provides:
- A class loader,
- A bytecode interpreter,
- Client and Server virtual machines, optimized for their respective uses
- Several garbage collectors,
- A set of supporting runtime libraries.
The version of HotSpot for Microsoft Windows runs a background process jucheck.exe, which continually checks for updates from Oracle.
Read more about this topic: Hot Spot
Famous quotes containing the word features:
“Art is the child of Nature; yes,
Her darling child, in whom we trace
The features of the mother’s face,
Her aspect and her attitude.”
—Henry Wadsworth Longfellow (1807–1882)