TFlow is an alternative FPGA design compilation flow which aims to reduce the back-end time required to implement an FPGA design. This flow focuses on enforcing modular design for both productivity and code reuse, while minimizing reliance on standard tools. This can be achieved by using a library of pre-compiled modules and associated meta-data to enable bitstream-level assembly of desired designs. In so doing, assembly occurs in a fraction of the time of traditional back-end tools. Modules are bound, placed, and routed using custom bitstream assembly with the primary objective of rapid compilation while preserving performance. Since licensed tools are not needed for assembly, compilation has been performed in embedded and/or untethered environments. As a result, large device compilations are assembled in seconds. This turbo flow enables software-like turn-around time for faster prototyping by leveraging pre-compiled omponents.