The only way to make them to write efficient code is to force developers to do development and testing of the software on the weak machine.
At my current job we have Windows virtual machines with 4 old Xeon cores, running at 2.4Ghz and 16Gb of RAM, no GPU. Such config will force them to write efficient UI.
At my current job we have Windows virtual machines with 4 old Xeon cores, running at 2.4Ghz and 16Gb of RAM, no GPU. Such config will force them to write efficient UI.