JFR Van Hooff By R
JFR can mean: * J. Front Retailing, a Japanese company * JDK Flight Recorder, Java diagnostic software * Johann's Face Records, Chicago, US * John Faulkner Racing, a former motor racing team in Australia * Paamiut Airport (IATA airport code), in Paamiut, Greenland * ''Journal of Formalized Reasoning The ''Journal of Formalized Reasoning'' is a peer-reviewed open access academic journal established in 2009. It publishes mathematical formalization, formalization efforts in any area, including classical mathematics, constructive mathematics, form ...

JDK Flight Recorder
JDK Flight Recorder is an event recorder built into the OpenJDK Java virtual machine. It can be thought of as the software equivalent of a Data Flight Recorder (Black Box) in a commercial aircraft. It captures information about the JVM itself, and the application running in the JVM. There is a wide variety of data captured, for example method profiling, allocation profiling and garbage collection related events. The JDK Flight Recorder was designed to minimize the Observer Effect in the profiled system, and is meant to be always on in production systems. The technology was open sourced in 2018. Analysis and visualization of flight recordings are normally done using JDK Mission Control. Technology A recording file consists of binary chunks of data. Each chunk is self describing and self contained. In other words, the metadata (such as the datatype and the content type of each attribute) needed to make use of the data (not only parse the events, but actually use them) is included i ...
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