Abstract: A computing system performs a policy-based machine code compression method. The computing system hosts a virtual machine that generates machine code from bytecode. The computing system determines whether to compress the machine code file according to a set of conditions specified by a policy. If the set of conditions is satisfied, the machine code file is compressed. For system booting and package installation, the machine code file can be deleted to save storage. When launching an application, the compressed machine code file is decompressed for execution. When the application process terminates, the decompressed machine code file can be deleted. The machine code file compression can be performed on a mobile device to save storage, or on a host when building a system image to reduce download time. Parallel compression and decompression algorithms can be used for the machine code file compression and decompression in a multi-core computing system.

Abstract: A programmable device is provided, comprising a memory for storage of an encrypted boot loader, and a processing unit coupled to the memory. In the processing unit, a boot straper decrypts the encrypted boot loader into a plurality of boot loader instructions when the programmable device is initialized. A core executes boot loader instructions to accordingly load and execute an operation system.

Abstract: Methods and systems for controlling a user interface of a consumer electronic device. An exemplary embodiment of a method for controlling a user interface of a consumer electronic device, including a plurality of I/O interfaces for communication with a plurality of data sources, is disclosed. The method comprises: utilizing the user interface to display a content list of a first data source present in the consumer electronic device if the first data source is active; and when a second data source is added to the consumer electronic device and then actively selected, utilizing the same user interface to display a content list of the second data source.