1. A computer program product in a non-transitory computer readable storage medium for adapting web-based applications in a client/server architecture, comprising: an adaptable application platform embodied on the non-transitory computer readable storage medium, the adaptable application platform including program instructions executable by a processor, the program instructions comprising: program instructions stored on the non-transitory computer readable storage medium for execution by a processing unit via the non-transitory computer readable storage medium, the program instructions comprising: program instruction to provide at least a first version and a second version of a client/server application wherein the first version executes primarily on an application server, executes a web-based application on the application server and sends an execution result to a client wherein the client renders the execution result in a web browser on the client, and wherein the second version executes primarily on the client and receives a package of data and executable code from the application server and wherein the client executes the received executable code using the received data and renders the execution result in the web browser on the client; program instructions to monitor, by an adaptable application platform, the client and the application server in the client/server architecture for one or more performance characteristics, wherein the one or more performance characteristics include CPU utilization, network latency, and network bandwidth between the client and the application server, and wherein the one or more performance characteristics are configurable and weighted; and responsive to detecting the one or more performance characteristics exceeding a configurable threshold, program instructions to switch dynamically between executing the first version to executing the second version.