update android

A delta update is a software update that only requires the user to download those parts of the software's code which are new, or have been changed from their previous state, in contrast to having to download the entire program. The use of delta updates can save significant amounts of time and computing bandwidth. The name delta derives from the mathematical science use of the Greek letter delta, Δ or δ to denote change.By using a delta update, a program can be updated more quickly and efficiently. For example: An auto racing simulation game has a size of 300 megabytes; it is updated to include a new racetrack, and the body of code which inserts the new racetrack into the game has a size of two megabytes; the game may use a delta update, which would require the download of only the two megabytes of new code, instead of a total download of 302 megabytes.

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