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:
“These, then, will be some of the features of democracy ... it will be, in all likelihood, an agreeable, lawless, particolored commonwealth, dealing with all alike on a footing of equality, whether they be really equal or not.”
—Plato (c. 427–347 B.C.)
“However much we may differ in the choice of the measures which should guide the administration of the government, there can be but little doubt in the minds of those who are really friendly to the republican features of our system that one of its most important securities consists in the separation of the legislative and executive powers at the same time that each is acknowledged to be supreme, in the will of the people constitutionally expressed.”
—Andrew Jackson (1767–1845)
“The features of our face are hardly more than gestures which force of habit made permanent. Nature, like the destruction of Pompeii, like the metamorphosis of a nymph into a tree, has arrested us in an accustomed movement.”
—Marcel Proust (1871–1922)