libdispatch: libdispatch (Grand Central Dispatch) libdispatch: libdispatch: Grand Central Dispatch (GCD or libdispatch) provides comprehensive libdispatch: support for concurrent code execution on multicore hardware. libdispatch: libdispatch: Homepage: https://apple.github.io/swift-corelibs-libdispatch/ libdispatch: libdispatch: libdispatch: libdispatch: libdispatch: