Compilation is very slow
I have a theory - or at least a partial one - why builds may be slow when using the external (make) builder and networking is enabled.
It may have something to do with the executable search PATH (environment variable) pointing to locations on network resources. Or, perhaps something within Eclipse’s build system is doing a PATH-driven search to find the toolchain executables, or maybe make is doing this.
It is just a theory - completely untested - that occurred to me while I was reading this thread.