just-in-time

Adjective

 * 1)  Taking place at the time when it is needed, and not in advance.
 * 2)  Of a manufacturing system in which components are delivered at the precise time required, thus minimizing inventory carrying costs.
 * 3)  Performing compilation of code on the client machine immediately before execution.
 * 1)  Performing compilation of code on the client machine immediately before execution.