From: rjh@cpax.org.uk   
      
   On 30/10/2025 04:24, Keith Thompson wrote:   
   > I haven't been using make's "-j" option for most of my builds.   
   > I'm going to start doing so now (updating my wrapper script).   
      
   Well, let's see, on approximately 10,000 lines of code:   
      
   $ make clean   
   $time make   
      
   real	0m2.391s   
   user	0m2.076s   
   sys	0m0.286s   
      
   $ make clean   
   $time make -j $(nproc)   
      
   real	0m0.041s   
   user	0m0.021s   
   sys	0m0.029s   
      
   That's a reduction in wall clock time of 4 minutes per MLOC to 4   
   *seconds* per MLOC. I can't deny I'm impressed.   
      
   --   
   Richard Heathfield   
   Email: rjh at cpax dot org dot uk   
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