tlbuild: Build in parallel

 
 4.3 Build in parallel
 =====================
 
 The TL build system carefully formulates dependencies as well as 'make'
 rules when a tool (such as 'tangle', 'ctangle', and 'convert') creates
 several output files.  This allows for parallel builds ('make -j N' with
 N>1 or even 'make -j') that can considerably speed up the TL build.
 
    Incidentally, a noticeable speed-up can be independently gained by
 using a configure cache file, i.e., specifying the 'configure' option
 '-C' (recommended).